Random Number Generator
Generate random numbers within any range — integers or decimals, single or multiple.
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How to use this calculator
- 1
Set the minimum and maximum values.
- 2
Choose how many numbers to generate.
- 3
Select integer or decimal output.
- 4
Click Calculate for a new set of random numbers.
Frequently asked questions
Is this truly random?
This uses JavaScript's Math.random(), a pseudo-random number generator (PRNG). It is suitable for most uses (games, decisions, sampling) but NOT for cryptographic or security purposes. For security, use crypto.getRandomValues().
How do I simulate a dice roll?
Set min to 1 and max to 6 for a standard 6-sided die. For a D20 (roleplaying), set min=1, max=20. For multiple dice, set count accordingly.
Can I generate unique lottery numbers?
Yes — set your range (e.g. 1–49), the count (e.g. 6), and turn off duplicates to get lottery-style unique numbers.
Random number generation: uses and fairness
Pseudo-random vs truly random
Computers generate pseudo-random numbers using algorithms. These are deterministic but appear random for practical purposes. True randomness comes from physical processes (thermal noise, radioactive decay) — used in hardware random number generators. For most applications, pseudo-random is sufficient.
Fair random selection
Randomly picking a winner, splitting into teams, or shuffling a list all require unbiased random selection. A proper random number generator (unlike a human "random" pick) has no bias toward any outcome.
Learn more from an authoritative source:
WikipediaDice Roller
Roll any number of dice with custom sides — D4, D6, D8, D10, D12, D20, D100, or custom.
Coin Flip
Flip a virtual coin — heads or tails. Flip multiple times and see statistics.
Magic 8 Ball
Ask the Magic 8 Ball a yes/no question and receive its mystical answer.
Random Color Generator
Generate random colors in HEX, RGB, and HSL formats. Generate a single color or a set of 5 random colors at once for design inspiration.
Color Palette Generator
Generate a harmonious color palette from any base hex color. Choose from complementary, analogous, triadic, or monochromatic schemes.
Username Generator
Generate unique, creative usernames from your name or keyword. Get 10 username suggestions with different styles — social media, gaming, professional.
Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →