GuidesDice Probability: Sums, Doubles and Common Mistakes
Understand fair dice with worked examples for sums, doubles and repeated rolls. Learn what changes the odds, and what a streak cannot tell you.
Read the storyOne die or a whole handful. Roll your next adventure with custom sides and instant totals.
Your goalRoll the dice you need and read their total.
ControlsTap the number fields to change the setup, then use the Roll button.
Rules & scoringChoose 1–12 dice with 2–100 sides. Each roll is independent. This is a casual tool, with no money or prizes.
Choose New game to restart. Your active board resets on refresh.
Use the controls above to start a fresh round. Your device handles the game; no account, payment or download is needed. Rules and supported modes are shown in the game itself.
This tool uses your browser’s cryptographic random generator where randomness is needed. It is for casual play and decisions, with no money or prizes.
GuidesUnderstand fair dice with worked examples for sums, doubles and repeated rolls. Learn what changes the odds, and what a streak cannot tell you.
Read the story
ResearchLearn to read game privacy notices, distinguish gameplay records from inferred profiles, and ask useful questions before sharing player data.
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