Free Online Math Tools
& Calculators
Fast, accurate, and easy-to-use math calculators for students, teachers, and professionals. From basic arithmetic to advanced calculus — all in your browser.
All Math Tools by Category
Browse our growing collection of free online calculators and converters.
Basic Arithmetic
Fundamental math operations including addition, subtraction, multiplication, and division.
Basic Calculator
Perform addition, subtraction, multiplication, and division with an easy-to-use online calculator.
Exponent Calculator
Calculate powers and exponents. Compute any base raised to any exponent instantly.
Scientific Notation Calculator | DigitHelm
Convert numbers to and from scientific notation and perform arithmetic in scientific notation.
Modulo Calculator — Remainder Division
Calculate the remainder of a division (modulo operation) for any two numbers.
Nth Root Calculator — Square & Cube
Calculate any nth root of a number including square root, cube root, and custom roots.
Number Sorter — Sort & Statistics
Sort a list of numbers in ascending or descending order. Find min, max, sum, and average.
Advanced Scientific Calculator
A CAS-level scientific calculator with graphing, matrices, complex numbers, derivatives, integrals, …
Percentages
Calculate percentages, percentage changes, and related operations.
Percentage Calculator | DigitHelm
Calculate percentages easily. Find what percent one number is of another, increase or decrease by a …
Percentage Change Calculator
Calculate the percentage increase or decrease between two values quickly and accurately.
Markup Calculator — Profit & Selling Price
Calculate markup percentage, selling price, and profit margin from cost and revenue.
Percentage Discount Calculator
Calculate sale price, discount amount, and savings percentage for any original price.
Percentage Error Calculator
Calculate the percentage error and absolute error between a measured and true value.
Averages & Ratios
Compute means, medians, modes, ratios, and proportions.
Average Calculator — Mean, Median & Mode
Calculate the mean, median, and mode of a set of numbers.
Weighted Average Calculator
Calculate the weighted average of values with different weights.
Ratio Calculator — Simplify & Solve
Simplify ratios, find equivalent ratios, and solve ratio problems.
Proportion Solver — Cross Multiply
Solve proportions by finding the unknown value in a/b = c/d equations.
Grade Calculator — GPA & Final Grade
Calculate your final grade from assignments, tests, and weighted components. Also computes GPA.
Harmonic Mean Calculator
Calculate the harmonic mean of a dataset. Compare with arithmetic and geometric means. Used for rate…
Fractions & Decimals
Convert and calculate with fractions, decimals, and mixed numbers.
Fraction Calculator — Add & Subtract
Add, subtract, multiply, and divide fractions with step-by-step solutions.
Fraction to Decimal Converter
Convert fractions to decimals and decimals to fractions instantly.
Mixed Number Calculator — Add & Divide
Add, subtract, multiply, and divide mixed numbers. Converts between mixed numbers, improper fraction…
Unit Conversions
Convert between units of length, weight, temperature, and more.
Unit Converter — Length, Weight & More
Convert between units of length, weight, temperature, volume, and more.
BMI Calculator — Body Mass Index
Calculate your Body Mass Index (BMI) to assess your weight category.
Number Base Converter — Binary, Hex
Convert numbers between binary, octal, decimal, and hexadecimal bases.
Speed Converter — mph, km/h, m/s
Convert between mph, km/h, m/s, knots, and feet per second.
Temperature Converter — °C, °F, K
Convert between Celsius, Fahrenheit, Kelvin, and Rankine temperature scales.
Energy Converter — Joules, kWh, BTU
Convert between joules, kilojoules, calories, kilocalories, BTU, kWh, and electron volts.
Pressure Unit Converter
Convert between Pascal, psi, atm, bar, mmHg, and torr pressure units.
Data Storage Converter
Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes.
Fuel Efficiency Converter
Convert between mpg (US), mpg (UK), L/100km, and km/L fuel economy units.
Angle Converter — Degrees & Radians
Convert between degrees, radians, gradians, and turns.
Power Unit Converter — Watts & HP
Convert between watts, kilowatts, horsepower, BTU/h, and other power units.
Algebra
Solve equations, simplify expressions, and work with variables.
Quadratic Equation Solver | DigitHelm
Solve quadratic equations (ax² + bx + c = 0) and find both real and complex roots.
Cubic Equation Solver | DigitHelm
Solve cubic equations (ax³ + bx² + cx + d = 0) and find all three roots.
Polynomial Evaluator — Compute f(x)
Evaluate any polynomial at a given value of x using Horner method.
Logarithm Calculator — Log & Ln
Calculate logarithms with any base. Supports natural log (ln), log base 10, and custom bases.
Absolute Value Equation Solver
Solve absolute value equations |ax + b| = c with step-by-step solutions.
Linear Equation Solver — Solve ax+b=c
Solve linear equations in one variable (ax + b = c) with step-by-step solutions.
Systems of Equations Solver 2×2
Solve systems of two linear equations with two unknowns using Cramer's rule.
Inequality Solver — Linear & Quadratic
Solve linear and quadratic inequalities with step-by-step solutions.
Summation Calculator — Sigma Notation
Evaluate summation expressions with custom formulas, bounds, and step values.
Complex Number Calculator — a+bi
Add, subtract, multiply, divide complex numbers and convert to polar form.
Completing the Square Calculator
Convert ax² + bx + c to vertex form a(x-h)² + k by completing the square.
Synthetic Division Calculator
Divide polynomials using synthetic division and find quotient and remainder.
Rational Root Theorem Calculator
Find all possible rational roots of a polynomial using the Rational Root Theorem.
Exponent Rules Calculator
Apply and simplify exponent rules: product, quotient, power, negative, and fractional exponents.
Logarithm Laws Calculator
Apply logarithm laws: product, quotient, power, change of base, and natural log rules.
Arithmetic Sequence Calculator
Find the nth term, partial sum, and common difference of any arithmetic sequence. Generate the first…
Geometric Sequence Calculator
Find the nth term, partial sum, and infinite sum of any geometric sequence. Determine convergence an…
Simplify Radicals Calculator
Simplify radical expressions by extracting perfect square (or nth-power) factors. Converts √72 → 6√2…
Geometry
Calculate areas, volumes, perimeters, and properties of shapes.
Area Calculator — Shapes & Formulas
Calculate the area of rectangles, circles, triangles, and other common shapes.
Volume Calculator — 3D Shapes
Calculate the volume of cubes, spheres, cylinders, cones, and other 3D shapes.
Perimeter Calculator — 2D Shapes
Calculate the perimeter and circumference of common 2D shapes.
Pythagorean Theorem Calculator
Find the missing side of a right triangle using a² + b² = c².
Distance Calculator — 2D & 3D Points
Calculate the distance between two points in 2D or 3D space.
Midpoint Calculator — Two Points
Find the midpoint between two points in 2D or 3D coordinate space.
Slope Calculator — Gradient & Line
Calculate the slope of a line between two points and find the line equation.
Circle Calculator — Area & Circumference
Calculate radius, diameter, circumference, and area of a circle from any known value.
Surface Area Calculator — 3D Shapes
Calculate surface area of cubes, spheres, cylinders, cones, and other 3D shapes.
Triangle Solver — Law of Sines & Cosines
Solve any triangle given SSS, SAS, ASA, or AAS using law of sines and cosines.
Coordinate Geometry Calculator
Calculate distance, midpoint, slope, equation of line, and area using coordinates.
Ellipse Calculator — Area & Perimeter
Calculate the area, perimeter (circumference), and eccentricity of an ellipse.
Regular Polygon Calculator
Calculate the area, perimeter, interior angles, and diagonal of any regular polygon.
Heron's Formula Calculator
Calculate the area of any triangle from its three side lengths using Heron's formula.
Circle Sector Calculator
Calculate the area, arc length, and perimeter of a circle sector or segment.
Torus Calculator — Volume & Surface Area
Calculate the volume, surface area, and other properties of a torus (donut shape).
Golden Ratio Calculator — φ = 1.618
Calculate golden ratio dimensions, find the golden mean, and explore related Fibonacci sequences.
Frustum Calculator — Truncated Cone
Calculate the volume, lateral surface area, and total surface area of a frustum.
Aspect Ratio Calculator — Screen & Image
Calculate and convert between aspect ratios. Find missing dimensions for any screen or image.
Map Scale Calculator
Convert between map distances and real-world distances using any map scale ratio.
Trigonometry
Work with sine, cosine, tangent, and related functions.
Trigonometry Calculator — Sin, Cos, Tan
Calculate sine, cosine, tangent, and their inverses for any angle.
Inverse Trig Calculator — Arcsin, Arccos
Calculate arcsin, arccos, arctan and get angles from trig ratios.
Right Triangle Solver — Sides & Angles
Solve any right triangle given two sides or one side and one angle.
Radians to Degrees Converter
Convert angles between radians and degrees instantly.
Calculus
Derivatives, integrals, limits, and differential equations.
Derivative Calculator — Differentiation
Compute numerical derivatives of polynomial, trig, exponential, and log functions at any point.
Second Derivative Calculator
Compute the second derivative and determine concavity at a given point.
Integral Calculator — Numerical
Compute definite integrals numerically using Simpson's rule and the trapezoidal rule.
Limit Calculator — Evaluate Limits
Evaluate limits of functions numerically as x approaches a value from left, right, or both sides.
Riemann Sum Calculator
Approximate definite integrals using left, right, midpoint, and trapezoidal Riemann sums.
Tangent Line Calculator
Find the equation of the tangent line to a function at a given point.
Newton's Method Calculator
Find roots of equations using Newton's iterative method with step-by-step convergence.
Arc Length Calculator — Curve Length
Calculate the arc length of a curve using numerical integration.
Partial Derivative Calculator
Compute partial derivatives of multivariable polynomial functions.
Taylor Series Calculator | DigitHelm
Compute Taylor/Maclaurin series expansions for common functions.
Differential Equation Solver — ODE
Solve first-order ODEs numerically using Euler method and RK4.
Area Between Curves Calculator
Calculate the area enclosed between two functions over an interval.
Volume of Revolution Calculator
Calculate volumes of solids of revolution using disc and shell methods.
Laplace Transform Calculator
Find Laplace transforms and inverse transforms for common functions.
Fourier Series Calculator
Compute Fourier coefficients for periodic functions.
Improper Integral Calculator
Evaluate improper integrals with infinite limits or discontinuities.
Series Convergence Calculator
Test if an infinite series converges or diverges using ratio, root, and comparison tests.
Statistics & Probability
Statistical analysis, probability calculations, and data tools.
Standard Deviation Calculator
Calculate standard deviation, variance, and other statistics for a dataset.
Z-Score Calculator — Standard Score
Calculate the z-score and find probabilities from the standard normal distribution.
Probability Calculator — Events
Calculate single event, multiple event, conditional, and complementary probabilities.
Correlation Coefficient Calculator
Calculate the Pearson correlation coefficient (r) between two datasets.
Linear Regression Calculator
Find the best-fit line (y = mx + b) using least squares regression.
Binomial Distribution Calculator
Calculate binomial probabilities, mean, variance, and cumulative distributions.
Poisson Distribution Calculator
Calculate Poisson probabilities for rare event modeling.
Chi-Square Calculator
Perform chi-square goodness-of-fit and independence tests.
Confidence Interval Calculator
Calculate confidence intervals for means and proportions.
Sample Size Calculator
Calculate the required sample size for surveys and experiments.
Percentile Calculator — Rank & Value
Find percentile ranks and values from a dataset.
ANOVA Calculator — One-Way
Perform one-way analysis of variance to compare group means.
Bayes' Theorem Calculator
Calculate conditional probabilities using Bayes' theorem.
T-Test Calculator — One-Sample
Perform a one-sample t-test to determine if a sample mean differs significantly from a known value.
Variance Calculator — Population & Sample
Calculate population variance and sample variance from a dataset with step-by-step workings.
Quartile Calculator — Q1, Q2, Q3 & IQR
Calculate Q1, Q2 (median), Q3, interquartile range (IQR), and detect outliers from data.
Frequency Distribution Calculator
Build a frequency distribution table from data. Calculate relative and cumulative frequencies.
Geometric Mean Calculator
Calculate the geometric mean and harmonic mean of a set of numbers.
Moving Average Calculator — SMA & EMA
Calculate simple moving average (SMA) and exponential moving average (EMA) for time series data.
Effect Size Calculator — Cohen's d
Calculate Cohen's d, Hedge's g, and r effect size for statistical significance testing.
Financial Math
Interest rates, loan payments, investment returns, and more.
Compound Interest Calculator
Calculate compound interest on savings and investments over time.
Simple Interest Calculator — I=PRT
Calculate simple interest using I = P × R × T formula.
Loan Payment Calculator
Calculate monthly loan payments, total interest, and amortization.
Tip Calculator — Split Bill
Calculate tip amount, total bill, and split between multiple people.
Mortgage Calculator — Monthly Payment
Calculate monthly mortgage payments, total interest, and amortization schedule.
ROI Calculator — Return on Investment
Calculate return on investment percentage from cost and revenue.
Currency Converter — Exchange Rates
Convert between major world currencies with customizable exchange rates.
Depreciation Calculator
Calculate straight-line and declining balance depreciation of assets.
Income Tax Calculator — US 2024
Estimate your income tax based on US federal tax brackets (2024). Calculate effective tax rate.
Break-Even Calculator
Calculate the break-even point in units and revenue from fixed costs, variable costs, and price.
Retirement Savings Calculator
Project how much you will have at retirement based on savings rate, return, and time horizon.
Inflation Calculator — Purchasing Power
Calculate the purchasing power of money over time using historical or custom inflation rates.
NPV Calculator — Net Present Value
Calculate the net present value (NPV) and profitability index of an investment.
Debt Payoff Calculator
Calculate how long to pay off debt and total interest paid for loans and credit cards.
Savings Goal Calculator
Calculate how long to reach a savings goal or the monthly contribution needed.
Salary to Hourly Calculator
Convert annual salary to hourly, daily, weekly, and monthly rates.
GST / VAT Calculator
Calculate GST and VAT amounts. Add or remove tax from any price at any tax rate.
Bill Splitter — Tip & Split
Split a restaurant bill with custom tip percentage and divide equally among any number of people.
Annuity Calculator — PV & FV
Calculate the present value and future value of ordinary annuities and annuities-due. Find payment a…
APR Calculator — Annual Percentage Rate
Calculate the Annual Percentage Rate (APR) of a loan from the loan amount, monthly payment, and term…
Fuel Cost Calculator — Trip Cost
Calculate trip fuel cost from distance, fuel efficiency, and price per litre or gallon. Supports km/…
Number Theory
Prime numbers, factors, GCD, LCM, and other number properties.
GCD & LCM Calculator
Find the GCD and LCM of two or more numbers.
Prime Factorization Calculator
Find the prime factorization of any positive integer and check primality.
Factorial Calculator — Compute n!
Calculate the factorial (n!) of any non-negative integer.
Fibonacci Calculator — nth Term
Generate Fibonacci numbers, find the nth term, and check if a number is Fibonacci.
Prime Number Checker
Check if any number is prime using an optimized trial division algorithm. Also lists factors.
Perfect Number Checker
Check if a number is perfect, abundant, or deficient and find all its proper divisors.
Roman Numeral Converter
Convert between Arabic numbers and Roman numerals (I, V, X, L, C, D, M).
Number Sequence Calculator
Find the nth term of arithmetic, geometric, and other common sequences.
Digital Root Calculator
Calculate the digital root (iterated sum of digits) and sum of digits of any number.
Physics
Kinematics, forces, energy, waves, electricity, and thermodynamics calculators.
Velocity Calculator — Speed & Time
Calculate velocity, distance, or time using v = d/t.
Acceleration Calculator — Kinematics
Calculate acceleration, velocities, or time using kinematic equations.
Force Calculator — Newton's Second Law
Calculate force, mass, or acceleration using Newton's second law.
Projectile Motion Calculator
Calculate range, max height, time of flight, and trajectory.
Work & Energy Calculator
Calculate work done, kinetic energy, potential energy, and power.
Momentum Calculator — p=mv
Calculate momentum, impulse, and solve collision problems.
Ohm's Law Calculator — V=IR
Calculate voltage, current, resistance, or power using Ohm's law.
Wave Calculator — Wavelength & Frequency
Calculate wavelength, frequency, period, and wave speed.
Gravitational Force Calculator
Calculate gravitational force between two masses using Newton's law.
Ideal Gas Law Calculator — PV=nRT
Solve PV = nRT for any unknown variable.
Friction Force Calculator
Calculate static and kinetic friction forces from normal force and coefficients.
Pendulum Calculator — Period & Frequency
Calculate the period, frequency, and length of a simple pendulum.
Spring Constant Calculator — Hooke's Law
Calculate spring constant, force, or displacement using Hooke's law (F = kx).
Coulomb's Law Calculator
Calculate electrostatic force between two charges.
Capacitance Calculator — Q=CV
Calculate capacitance, charge, voltage, and energy stored in capacitors.
Thermal Expansion Calculator
Calculate linear and volumetric thermal expansion of materials.
Pressure Calculator — P=F/A
Calculate pressure from force and area, convert pressure units, and compute fluid pressure.
Density Calculator — ρ=m/V
Calculate density, mass, or volume using ρ = m/V.
Decibel Calculator — dB Conversions
Convert between decibels, power ratios, and amplitude ratios.
Doppler Effect Calculator
Calculate observed frequency shifts due to relative motion of source and observer.
Centripetal Force Calculator
Calculate centripetal force, velocity, radius, and period for circular motion.
Torque Calculator — τ = rF sin(θ)
Calculate torque from force, distance, and angle of application.
Kinetic Energy Calculator — KE=½mv²
Calculate translational and rotational kinetic energy.
Potential Energy Calculator — PE=mgh
Calculate gravitational potential energy (mgh) and elastic potential energy (½kx²).
Snell's Law Calculator — Refraction
Calculate refraction angles and critical angles for light passing between media.
Lens Equation Calculator — Optics
Calculate focal length, object distance, image distance, and magnification for thin lenses.
Half-Life Calculator — Radioactive Decay
Calculate radioactive decay, remaining quantity, and elapsed time from half-life.
Escape Velocity Calculator
Calculate the escape velocity from any celestial body given mass and radius.
Buoyancy Calculator — Archimedes
Calculate buoyant force using Archimedes principle (F = ρVg).
Heat Transfer Calculator — Q=mcΔT
Calculate heat energy using Q = mcΔT for specific heat and phase changes.
Electric Power Calculator — P=VI
Calculate electric power using P = V×I, P = I²R, or P = V²/R formulas.
Magnetic Force Calculator — Lorentz
Calculate the magnetic force on a moving charge (Lorentz force) F = qvB sin(θ).
Resistor Color Code Calculator
Decode 4-band and 5-band resistor color codes to find resistance and tolerance.
Blackbody Radiation Calculator
Calculate blackbody radiation power using the Stefan-Boltzmann law and peak wavelength.
Reynolds Number Calculator
Calculate the Reynolds number to determine laminar or turbulent fluid flow.
Electric Field Calculator — E=kq/r²
Calculate electric field strength using E = F/q and E = kq/r² (Coulomb's law).
Sound Intensity Calculator — dB
Calculate sound intensity level in dB from intensity, and convert between intensity and dB.
Specific Gravity Calculator
Calculate specific gravity, relative density, and compare material density to water.
Linear Algebra
Matrices, determinants, vectors, eigenvalues, and systems of equations.
Matrix Determinant Calculator
Calculate the determinant of 2×2 and 3×3 matrices.
Matrix Multiplication Calculator
Multiply two matrices together with step-by-step dot products.
Vector Calculator — Dot & Cross Product
Add, subtract, find dot product, cross product, and magnitude of vectors.
Matrix Inverse Calculator
Calculate the inverse of a 2×2 or 3×3 matrix with step-by-step elimination.
Eigenvalue & Eigenvector Calculator
Calculate eigenvalues and eigenvectors for 2×2 matrices.
Matrix Transpose Calculator
Transpose matrices of any size by swapping rows and columns.
Matrix RREF Calculator
Reduce any matrix to Row Reduced Echelon Form (RREF) using Gauss-Jordan elimination. Shows pivot pos…
Discrete Math
Permutations, combinations, factorials, and set operations.
Combination Calculator — nCr
Calculate the number of combinations (n choose r).
Permutation Calculator — nPr
Calculate the number of permutations where order matters.
Boolean Algebra Calculator
Evaluate Boolean expressions with AND, OR, NOT, XOR, NAND, NOR operators.
Combinations with Repetition Calculator
Calculate combinations with repetition (multiset coefficients) where repetition is allowed.
Pascal's Triangle Calculator
Generate Pascal's triangle up to any row and expand (a + b)ⁿ using the binomial theorem. Shows all c…
Advanced Equations
Systems of equations, matrices, and complex number operations.
More tools coming soon in this category!
Graphing & Visualization
Plot and visualize mathematical equations and curves with downloadable graphs.
Equation Graph Generator — Plot & Download
Plot any mathematical equation y = f(x) on a beautiful graph and download it as a PNG image.
Parametric Curve Grapher — x(t) y(t)
Plot parametric curves defined by x(t) and y(t) and download the graph as PNG.
Polar Graph Generator — r(θ)
Plot polar equations r(θ) including roses, spirals, and limaçons. Download as PNG.
Random Generators
Generate random numbers, passwords, dice rolls, colors, and more.
Random Number Generator
Generate random integers or decimals within any range. Generate single or multiple numbers at once.
Random Password Generator
Generate strong, secure random passwords with custom length and character sets.
Dice Roller — Virtual Dice
Roll any number of dice with any number of sides. Supports D4, D6, D8, D10, D12, D20 and custom dice…
Random List Picker
Enter a list of items and randomly pick one or more. Perfect for decisions, giveaways, and selection…
Coin Flip Simulator — Heads or Tails
Flip a virtual coin and track heads/tails statistics over multiple flips.
Random Color Generator — HEX, RGB
Generate random colors with HEX, RGB, and HSL values. Copy values instantly.
Lottery Number Generator
Generate random lottery numbers for Powerball, Mega Millions, or custom number ranges.
UUID Generator — UUID v4
Generate UUID v4 universally unique identifiers instantly. Generate single or bulk UUIDs.
Date & Time
Calculate ages, date differences, countdowns, and time conversions.
Age Calculator — Years, Months & Days
Calculate your exact age in years, months, days, hours, and minutes from your birthdate.
Date Difference Calculator
Calculate the exact number of days, weeks, months, and years between two dates.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds.
Day of Week Calculator
Find out what day of the week any date falls on using Zeller's formula.
Work Hours Calculator — Time & Pay
Calculate total work hours between a start and end time, with optional break deductions.
Countdown Calculator — Days Until
Calculate the exact days, hours, and minutes until or since any date or event.
Time Duration Calculator
Add or subtract time durations. Convert hours, minutes, and seconds.
Business Days Calculator
Count the number of working days (weekdays) between two dates, excluding weekends and optionally pub…
Health & Fitness
Calorie needs, body fat, heart rate zones, and fitness calculators.
Calorie Calculator — TDEE
Calculate your Total Daily Energy Expenditure (TDEE) and recommended calories for your goal.
Body Fat Percentage Calculator
Estimate body fat percentage using the US Navy method from waist, neck, and height measurements.
Heart Rate Zone Calculator
Calculate your target heart rate zones for fat burning, cardio, and peak performance training.
Ideal Weight Calculator
Calculate ideal body weight using Devine, Robinson, Miller, and Hamwi formulas.
Water Intake Calculator — Hydration
Calculate your recommended daily water intake based on weight, activity level, and climate.
Running Pace Calculator
Calculate pace, speed, distance, or time for running, walking, and cycling activities.
Macronutrient Calculator — Macros
Calculate your daily protein, carbohydrate, and fat targets based on your TDEE and goals.
BMR & TDEE Calculator
Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) using the Miffli…
Sleep Calculator — Best Bedtime
Calculate ideal bedtimes or wake-up times based on 90-minute sleep cycles. Find out when to sleep or…
Chemistry
Molar mass, pH, molarity, dilution, and chemistry calculations.
Molar Mass Calculator — Molecular Weight
Calculate the molar mass of common chemical elements and simple compounds.
Molarity Calculator — M = n/V
Calculate molarity, moles, or volume of solutions using M = n/V formula.
pH Calculator — pH, pOH & Ions
Calculate pH, pOH, [H⁺], and [OH⁻] concentrations for acids and bases.
Dilution Calculator — C₁V₁=C₂V₂
Calculate solution dilutions using C₁V₁ = C₂V₂ formula. Find any unknown variable.
Stoichiometry Calculator — Moles & Grams
Convert between moles and grams using molar mass. Calculate mass from moles and vice versa.
Text & Encoding
Word count, text conversion, Base64, Morse code, and encoding tools.
Word Count Calculator
Count words, characters, sentences, paragraphs, and estimate reading time for any text.
Text Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, or snake_case.
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 strings back to plain text instantly.
Morse Code Converter
Convert text to Morse code and decode Morse code back to text.
ASCII & Unicode Value Calculator
Look up ASCII and Unicode values for any character, or convert character codes to text.
Number to Words Converter
Convert any number (up to trillions) to its English word representation.
Computer Science
Bitwise operations, binary arithmetic, RGB/HEX, and CS calculators.
Bitwise Calculator — AND, OR, XOR
Perform bitwise AND, OR, XOR, NOT, left shift, and right shift operations on integers.
Binary Arithmetic Calculator
Add, subtract, multiply, and divide binary numbers with step-by-step solutions.
Two's Complement Calculator
Convert integers to two's complement binary representation and back.
RGB to HEX Color Converter
Convert colors between RGB, HEX, and HSL formats instantly.
IP Subnet Calculator — CIDR
Calculate subnet mask, network address, broadcast address, and usable hosts for any CIDR.
Floating Point Converter — IEEE 754
Convert decimal numbers to IEEE 754 32-bit and 64-bit floating point binary representation.
Engineering
Voltage divider, gear ratio, beam deflection, and engineering tools.
Voltage Divider Calculator
Calculate output voltage from a resistor voltage divider circuit using Vout = Vin × R2/(R1+R2).
Gear Ratio Calculator — RPM & Torque
Calculate gear ratio, output RPM, torque ratio, and speed reduction for gear trains.
Beam Deflection Calculator
Calculate maximum deflection and slope for simply supported and cantilever beams under various loads…
Pipe Flow Calculator — Darcy-Weisbach
Calculate fluid flow rate, velocity, and pressure drop in pipes using the Darcy-Weisbach equation.
Power Factor Calculator — AC Circuit
Calculate power factor, real power, reactive power, and apparent power for AC circuits.
Resistor Series & Parallel Calculator
Calculate equivalent resistance for resistors in series, parallel, or mixed configurations. Add or r…
Concrete & Cement Calculator
Calculate the volume of concrete needed for slabs, footings, columns, and stairs. Converts to bags o…
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