Math Tools

Average Calculator

Mean, Median, Mode & Standard Deviation

Paste a list of numbers and instantly get every key statistic: mean, median, mode, range, minimum, maximum, sum, count, and standard deviation. Whether you are grading assignments or analyzing data, this tool does the math.

Fraction Calculator

Add, Subtract, Multiply & Divide Fractions

Enter two fractions, pick an operation, and get the simplified answer instantly — shown as both a fraction and a decimal. Uses the Euclidean algorithm to reduce every result to its simplest form.

Percentage Calculator

Find Percentages, % of a Number & % Change

Solve the three most common percentage problems in one tool: find a percentage of a number, determine what percent one number is of another, or calculate percentage change between two values.

Random Number Generator

Cryptographically Secure Random Integers

Generate one or more random integers within any range you specify. Powered by the Web Crypto API for high-quality randomness. Control the min/max values, how many numbers to generate, and whether duplicates are allowed.

Ratio Calculator

Solve Proportions & Simplify Ratios

Solve, simplify, and scale ratios instantly. Enter any two-term ratio to simplify it, or find a missing value in a proportion. Results update in real time and display both the simplified ratio and its decimal equivalent.