Random Number Generator

Need a random number? This tool provides a flexible way to generate one or more numbers to your exact specifications. It's perfect for picking lottery numbers, creating teams for a game, or selecting a random sample for a study.

Settings

Minimum Value

Maximum Value

How many numbers to generate?

Allow Duplicates Allow Decimals

Places:

Generated Numbers

How Does the Random Number Generator Work?

Our online Random Number Generator uses the JavaScript Math.random() function, a built-in method that produces a pseudo-random floating-point number between 0 (inclusive) and 1 (exclusive). This raw value is then mathematically scaled and adjusted to fit within the custom range you provide — whether it’s a minimum and maximum whole number, decimal values, or larger datasets.

If you select the option to prevent duplicates, the tool ensures every generated number is unique by re-running the process until a new value is found. This makes it especially useful for lottery simulations, classroom activities, raffles, gaming, math practice, probability studies, and any scenario where fair and non-repetitive randomization is required.

Unlike static number pickers, this free randomizer is fast, browser-based, and requires no downloads or registration. Simply set your range, click generate, and instantly get reliable results you can use for statistics, experiments, quizzes, programming projects, and more.