Random Number Generator

Generate truly pseudo-random numbers within a customizable minimum and maximum range for giveaways, statistical sampling, games, and lotteries.

Summary:A random number generator produces unbiased numerical values within designated lower and upper bounds. It supports single numbers, batches of unique non-repeating integers, and random decimal sequences.
Randomized Sequence

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Copy this code snippet to add the Random Number Generator to your blog or website for free. It adjusts dynamically to mobile and desktop screens.

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How to Use Random Number Generator

Follow these steps to use the Random Number Generator: 1. Input the minimum and maximum boundaries of your desired number range. 2. Specify how many random numbers you wish to generate in a single sequence. 3. Toggle the duplicate setting to allow or restrict repeating numbers in lists. 4. Click the generate button to view your custom list of random integers. Choose your preferences and generate the result instantly. This tool performs calculations locally in your browser.

Random Number Generator Formula / How It Works

The tool utilizes the browser’s pseudo-random number generator, scaling decimal inputs to the integer range between the specified boundaries.

Formula:Rnd = Math.floor(Math.random() * (Max - Min + 1)) + Min.
Example Calculation:

For example, let's look at generating 5 unique random numbers between a minimum of 1 and a maximum of 50. By entering these values into the tool, you will get a generated list of five non-repeating random integers, such as 12, 45, 7, 33, and 28 instantly.

Frequently Asked Questions

It uses Math.random() which is pseudo-random. For cryptography, use Web Crypto API.

Yes, check the "Unique numbers only" setting.

You can input negative or positive integers up to millions.

Assign numbers to names and generate a random integer within that range.

A starting value for pseudo-random algorithms; this browser tool uses dynamic seeds.

More tools available in our full calculator directory.