Math Tools
Math Tools range from percentages and ratios to algebra, geometry, factorials, logarithms and other focused calculations with formulas and examples.
Percentages & everyday math
Solve common percentage, ratio and everyday number questions.
Percentage Calculator
Find what percentage one number is of another.
Open tool →Percentage Change Calculator
Calculate percentage increase or decrease between two values.
Open tool →Average Calculator
Find the arithmetic mean of a list of numbers.
Open tool →Ratio Simplifier
Simplify a two-number ratio to its lowest whole-number form.
Open tool →Fraction to Percent Calculator
Convert a fraction into a percentage.
Open tool →Square Root Calculator
Calculate the principal square root of any non-negative number.
Open tool →Absolute Value Calculator
Find the non-negative absolute value of a number.
Open tool →Modulo Calculator
Calculate the non-negative remainder after division.
Open tool →Random Number Generator
Generate one or more random whole numbers inside a minimum and maximum range.
Open tool →Number theory & powers
Work with factors, primes, factorials, exponents, logarithms and scientific notation.
GCD & LCM Calculator
Find the greatest common divisor (GCD) and least common multiple (LCM) of two positive whole numbers.
Open tool →Prime Number Checker
Check whether a positive whole number is prime and see the basic divisibility result.
Open tool →Factorial Calculator
Calculate n! for a non-negative whole number.
Open tool →Exponent Calculator
Raise a base number to a chosen exponent.
Open tool →Logarithm Calculator
Calculate a logarithm using any valid positive base except 1.
Open tool →Scientific Notation Converter
Convert a finite number into scientific notation.
Open tool →Algebra, geometry & combinatorics
Solve equations, geometry measurements and counting problems.
Quadratic Equation Solver
Solve ax² + bx + c = 0 for real or complex roots.
Open tool →Pythagorean Theorem Calculator
Find the hypotenuse of a right triangle from its two perpendicular sides.
Open tool →Circle Calculator
Calculate circle diameter, circumference and area from radius.
Open tool →Triangle Area Calculator
Calculate triangle area from base and perpendicular height.
Open tool →Rectangle Calculator
Calculate rectangle area, perimeter and diagonal from length and width.
Open tool →Permutation & Combination Calculator
Calculate nPr and nCr for non-negative whole numbers.
Open tool →About Math Tools
Everyday and study-focused math calculators for arithmetic, algebra, geometry, combinatorics and number operations.
- Helpful for schoolwork, reports and everyday calculations.
- Supports decimals where the underlying formula allows them.
- Examples on each tool page make the method easier to verify.
Each tool page includes its own inputs, method or formula, example and relevant notes. Use the topic sections above to move between closely related tasks, or browse the complete SmartCheu tools directory.