Random Number Generator: How It Works and How to Use It
Generate random numbers in any range, with or without repeats, or shuffle a list of names to pick a winner or make teams.
Like every tool on UltimateTools, it runs instantly in your browser, updates as you type, and doesn't require an account or sign-up to use.
What it calculates
Generate random numbers or shuffle a list of names.
Whether you think of it as a "random number generator" tool, a "number picker or shuffle list" tool, or simply the Random Number Generator, this page covers the same calculation.
You can find it at any time on the Random Number Generator page, where the calculator sits above a full explanation of the method it uses.
Tips for an accurate result
Negative numbers and signs are a common source of quiet errors — double-check the sign of a result before using it.
If two different formulas should give the same answer, use both once to confirm before trusting either going forward.
Small rounding differences between two methods are normal — they don't usually mean either one is wrong.
Keep units attached to numbers as you work, not just at the end — it's the fastest way to catch a mismatched calculation.
Related tools worth trying
If you found the Random Number Generator useful, Fraction Calculator, Percentage Calculator, Tip Calculator cover closely related ground and are worth a look next.