Free Basic Arithmetic Calculators

Basic Calculator

Free online calculator with memory functions, keyboard support, calculation history, and floating-point correction. Add, subtract, multiply, and divide instantly.

Exponent Calculator | bⁿ, Roots & Logarithms

Calculate any base raised to any power (bⁿ), find the base given a result and exponent, or solve for the exponent using logarithms. Handles negative, fractional, and zero exponents with step-by-step working.

Scientific Notation Calculator

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.

Remainder Calculator | Long Division with Steps

Calculate the quotient and remainder of any division with full long division working shown step by step. Also computes the modulo and checks divisibility for multiple divisors at once.

Recipe Scaling Calculator | Multiply or Divide Servings

Scale any recipe up or down by servings or a custom multiplier. Convert between cups, tablespoons, teaspoons, and grams. Handles fractions, adjusts pan sizes, and notes ingredients that do not scale linearly.

Advanced Scientific Calculator

A CAS-level scientific calculator with graphing, matrices, complex numbers, derivatives, integrals, statistics, and equation solving, all in one.

GPA Calculator | Weighted & Cumulative GPA with What-If

Calculate weighted GPA for a semester or cumulatively across all years. Supports letter grades with +/− and custom grading scales. Built-in what-if analyzer shows the exact grades needed to reach your GPA target.