Calculatree

Random Number Generator

Pick a random number between any two values.

Inputs

Updates live as you type

How it works

A simple, uniform random number generator for picking a winner, rolling a custom die, or making a decision. Each value in the range is equally likely; recompute to draw again.

Frequently asked questions

Is this truly random?

It uses your browser’s built-in pseudo-random generator, which is more than random enough for games, raffles, and everyday choices — but not for cryptography or anything requiring certified randomness.

Related calculators

Scientific CalculatorEvaluate an arithmetic expression with parentheses and powers.Percentage CalculatorWork out a percentage of a number and percentage change.Date Difference CalculatorCount the days, weeks, and months between two dates.Age CalculatorCalculate exact age in years, months, and days from a birth date.