Dice roll calculator
with a real 3D die.
Set a target, pick a direction, roll — 1,000 free demo credits, a real spinning cube, no signup. Every win chance and payout below comes from the same formula every provably-fair dice game runs on, derived here in full.
- Return to player
- 99.00%
- House edge
- 1.00%
Demo credits only. No funds, no account, no payout.
Pick a target, the payout follows automatically.
Every round draws one number from 0.00 up to 100.00, generated before you see it — the same pre-commitment used by Mines' layout and Crash's crash point. Roll under your target and you win; roll over it (in "under" mode) and you don't. Because the draw is uniform, win chance is just the target itself: pick 25 and you win 25% of the time, pick 90 and you win 90% of the time. The payout scales the other way to keep the edge constant: 99 ÷ win chance%.
Two scope notes: real platforms typically allow four-decimal precision and let some accounts adjust the house edge itself within a range — this demo fixes both at a simple 1% edge and two-decimal rolls. And the 3D cube's face is a decorative mapping of which sixth of the 0–100 range the roll landed in, not the mechanic itself — the number and the win/loss call always come from the roll-under/over check above.
That −1.00% figure doesn't move if the target shifts to 5 or 95, or if the mode flips to roll-over — only the win chance and the size of the payout do. The edge is baked into the formula itself, not into any particular target.
Wider target, smaller payout — same edge underneath.
| Win chance | Payout | Expected value |
|---|---|---|
| 2% | 49.50× | -1.00% |
| 5% | 19.80× | -1.00% |
| 10% | 9.90× | -1.00% |
| 25% | 3.96× | -1.00% |
| 50% | 1.98× | -1.00% |
| 75% | 1.32× | -1.00% |
| 90% | 1.10× | -1.00% |
| 95% | 1.04× | -1.00% |
A tighter edge than most of the casino floor.
Dice shares its ~1% convention with Crash — both are simple, provably-fair formats that crypto casinos tend to price the tightest. It's not as tight as blackjack played with correct basic strategy, but it's meaningfully better than roulette or a typical online slot. These comparison figures are widely-cited industry conventions, not independently re-derived here the way the Dice formula itself is.
Not every "Dice" runs the same edge.
The formula above — 99 ÷ win chance% — is the standard shape almost every crypto dice game uses, but the exact edge and precision vary by platform. Stake and BC.Game's in-house Dice both cite the crypto-standard ~1% edge; Roobet's runs its own house-edge convention. Same math, different number plugged in.
99% RTP convention — the table above
Own in-house Dice, ~99% RTP cited. Read the guide →
Own in-house Dice, ~99% RTP cited. Read the guide →
Own in-house Dice. Read the guide →
One thing worth checking next.
Four more tools
run the same way.
Mines, Plinko, Crash and Bonus & VIP all publish their formula the same way Dice does here — free, no signup, demo only.