The dice roller lets you throw as many dice as you like without digging the box out of the cupboard. Choose the type of die, set how many you need, and see each individual roll alongside the total.
How the dice roller works
Start by choosing which die you want. The D6 is the familiar six-sided cube used in most board games, while the D20 is the standard for tabletop role-playing games such as Dungeons & Dragons. Then set how many dice to throw at once and press the button.
The result shows each die separately, followed by the sum. Every throw is kept in the history, so you can look back at what you rolled and repeat the same throw with a single click.
Are the dice really random?
Yes. Slumpa uses the browser's cryptographic random number generator through crypto.getRandomValues rather than the simpler Math.random. On top of that it applies rejection sampling, which removes the slight bias that appears when a raw random value is squeezed into a range of die faces.
In practice that means every face has exactly the same chance of coming up – just like a physical die, except there is no risk of it being weighted unevenly or landing on a sloping table.
Frequently asked questions
- Which dice can I roll?
- D4, D6, D8, D10, D12, D20 and D100. You can roll several dice of the same type at once and see both the individual results and the total.
- Does it cost anything?
- No. The dice roller is completely free, needs no account and works on phones, tablets and computers.
- Are my rolls saved?
- Rolls are kept in the history locally in your browser. Nothing is sent to a server.
