Math Calculators

Pick a calculator below. Each page explains the formula, shows how we calculate the result, and links to related tools when you need them. See our About page for how we build and review tools.

Basic Arithmetic

5 tools

• Basic Calculator
• Percentage Calculator
• Ratio Calculator
• Rounding Calculator
• Long Division Calculator

Algebra & Equations

6 tools

• Quadratic Formula Calculator
• Exponent Calculator
• Root Calculator
• Log Calculator
• Scientific Notation Calculator
• Matrix Calculator

Number Theory

5 tools

• Factor Calculator
• Prime Factorization Calculator
• Greatest Common Factor Calculator
• Least Common Multiple Calculator
• Common Factor Calculator

Geometry

9 tools

• Area Calculator
• Volume Calculator
• Surface Area Calculator
• Pythagorean Theorem Calculator
• Circle Calculator
• Triangle Calculator
• Right Triangle Calculator
• Distance Calculator
• Slope Calculator

Statistics & Probability

10 tools

• Average Calculator
• Mean Median Mode Range Calculator
• Standard Deviation Calculator
• Probability Calculator
• Permutation and Combination Calculator
• Z Score Calculator
• P Value Calculator
• Confidence Interval Calculator
• Sample Size Calculator
• Statistics Calculator

Sequences & Series

1 tools

• Number Sequence Calculator

Number Systems

4 tools

• Binary Calculator
• Hex Calculator
• Fraction Calculator
• Big Number Calculator

Utilities

4 tools

• Scientific Calculator
• Random Number Generator
• Percent Error Calculator
• Half Life Calculator

These 44 calculators are free to use on any device. Results are estimates based on standard formulas — not professional advice.