Calculator category

Math Calculators

Fast everyday percentage and arithmetic calculations.

About math calculators

Math calculators solve everyday number problems — from basic percentages and fractions to algebra, geometry, statistics, and number theory. Whether you're a student checking homework, a professional verifying calculations, or just curious about numbers, these tools provide fast, accurate results with step-by-step explanations.

Available calculators (28 total)

Scientific Calculator

Evaluate trigonometric functions, logarithms, exponents, roots, factorials, and complex expressions.

Percentage Calculator

Find what percentage one number is of another.

Proportion Calculator

Solve proportions using cross multiplication.

Quadratic Formula Calculator

Solve quadratic equations ax² + bx + c = 0.

Fraction Calculator

Add, subtract, multiply, or divide two fractions.

Decimal ↔ Fraction Converter

Convert between decimals and fractions.

GCD & LCM Calculator

Find the greatest common divisor and least common multiple.

Exponent Calculator

Calculate powers, roots, and exponential expressions.

Square & Cube Root Calculator

Calculate square roots, cube roots, and nth roots.

Average Calculator

Calculate mean, median, and mode of a set of numbers.

Prime Number Checker

Check if a number is prime and find its factors.

Factorial Calculator

Calculate n! and related combinatorial values.

Number Base Converter

Convert between binary, octal, decimal, and hexadecimal.

Pythagorean Theorem Calculator

Calculate the missing side of a right triangle.

Area Calculator

Calculate area of common shapes.

Volume Calculator

Calculate volume of common 3D shapes.

Logarithm Calculator

Calculate logarithms in various bases.

Permutation Calculator

Calculate P(n,r): arrangements where order matters.

Combination Calculator

Calculate C(n,r): selections where order doesn't matter.

Standard Deviation Calculator

Calculate population and sample standard deviation.

Variance Calculator

Calculate population and sample variance.

Roman Numeral Converter

Convert between Roman numerals and Arabic numbers.

GPA Calculator

Calculate grade point average from course grades and credit hours.

Random Number Generator

Generate random numbers within a specified range.

Password Generator

Generate secure random passwords with customizable options.

Numbers to Words Converter

Convert numbers to written words for checks and legal documents.

Color Converter

Convert colors between HEX, RGB, HSL, and CMYK formats.

Fun Comparisons Calculator

Convert measurements to fun object equivalents like football fields and Eiffel Towers.

When to use a calculator vs. mental math

Simple operations like percentages and proportions are great for mental math. Complex problems — quadratic equations, standard deviation, and base conversions — benefit from calculator precision. Always estimate the answer first to catch input errors, and verify results with a second method when possible.

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