Dice is the most mathematically transparent probability game — you control the exact win probability. Set a 50% chance for a 1.98x return, or 1% for 98x. This free simulator and probability calculator shows the direct inverse relationship between probability and multiplier — fully transparent and verifiable at every setting.
Last updated: March 28, 2026
Control your exact win probability from 0.01% to 98% and see the inverse relationship between chance and multiplier.
Free to play · No signup required
This free dice probability simulator demonstrates one of the most mathematically transparent games. You set a target number between 0 and 99.99, then choose Roll Over or Roll Under. The game generates a random number — if it meets your condition, you win. The return multiplier is calculated directly from your probability.
The key mechanic is that you control the exact win probability through the target slider. Set a target of 50 with Roll Over for a roughly 50% chance and approximately 2x return. Move it to 10 with Roll Under for a 10% chance and approximately 10x return. The relationship is straightforward: lower probability equals higher multiplier.
The multiplier-to-probability relationship holds at every target setting, though short-term variance can swing results significantly. This makes Dice ideal for testing strategies like Martingale and D'Alembert, since the math is completely transparent. Note that this is a Roll Over/Under game, not a dice combination game — there is just a single random number.
Explore the inverse relationship between success chance and multiplier. Drag the slider or type a multiplier to see how the numbers are mathematically linked — higher multipliers always mean lower probability. Watch simulated rolls land in real-time on the number line.
Type a multiplier — slider updates instantly
Number Line — drag to adjust target
Live Cumulative Net Return — 1.00 unit per roll
At 50.00% chance with a 1.9800x multiplier, you need to succeed at least 50.51% of the time to reach a neutral outcome. Expected return: 99.00%.
Only Dice lets you choose the exact probability. Run the same strategy at two different success chances simultaneously and compare their trajectories. See how Martingale at 50% differs from Martingale at 25% — same math, different odds, radically different outcomes.
Compare up to eight success chances across tens of thousands of rolls. Every configuration sits on the same inverse probability curve — Multiplier = 1 / Chance — and follows the same mathematical model. The only difference is variance.
Honest, math-based answers about Dice.
Deal. Decide. Count.
Spin. Analyze. Learn.
Drop. Bounce. Multiply.
Rise. Collect. Or crash.
Reveal. Avoid. Multiply.
Guess. Stack. Collect.
Target. Launch. Instant.
Pick. Match. Multiply.
Pick. Flip. Double.
This is a free mathematical simulation for educational purposes. No real money is used.
