About the Coin Flip & Dice Roller
Sometimes you need a decision made for you, or a set of dice you left at home. This tool flips up to fifty coins and rolls up to twenty dice of any common size, using your browser's cryptographic random generator so every result is independent and unbiased — genuinely better than a worn physical die with rounded corners.
How to use the Coin Flip & Dice Roller
- Choose coin flip or dice roller.
- Set how many coins, or how many dice and how many sides.
- Press Flip or Roll.
- Read the individual results plus the total, highest and average.
Why use this tool?
Any die size
D4, D6, D8, D10, D12, D20 and D100 for board games and tabletop RPGs.
Batch flipping
Flip fifty coins at once to demonstrate probability or settle a multi-way decision.
Roll history
The last dozen results stay on screen so nobody can dispute what was rolled.
Frequently asked questions
Is it truly random?
It uses crypto.getRandomValues, the cryptographically secure generator browsers provide, not Math.random. For games and decisions it is as fair as it needs to be.
Can I roll advantage in D&D?
Roll two D20 and take the higher — the highest value is shown in the summary.
Do previous flips affect the next one?
No. Each flip is independent. Five heads in a row does not make tails more likely next time — that belief is the gambler's fallacy.