Provably Fair
The commit-reveal scheme that lets you recompute every roll yourself instead of trusting the casino's word.
Precise terms are not pedantry in this niche; they are the audit trail. A casino that says "provably fair" is making a specific cryptographic claim: it committed to a server seed by publishing its SHA-256 hash before you bet, combined it with your client seed and an incrementing nonce, and will reveal the seed so you can recompute every roll. If you cannot define those three words, you cannot check the claim, and an uncheckable fairness claim is just marketing.
The same goes for money terms. Players who conflate RTP with a session guarantee, or miss that a payout multiplier below 99 divided by win chance means a bigger hidden edge, lose real funds to definitions they skipped. Each entry below is short by design: definition first, formula second, worked example third. When you want to see a term operate on live numbers, the provably fair verifier recomputes real rolls, and the fairness pages of the best bitcoin dice sites are where these terms appear in the wild.
Dice Glossary Quick Facts
The table below records the key parameters of this topic. Each value is
covered in depth by its own guide within this hub.
| Terms defined | 12, grouped into fairness, math, and casino terms |
| Core fairness trio | Server seed, client seed, nonce |
| Standard dice numbers | 1% house edge, 99% RTP, multiplier = 99 / win chance |
| Most misunderstood | RTP: a long-run average, never a session promise |
| See terms in action | Recompute a real roll in the provably fair verifier |
Provably Fair Terms
Server Seed
The casino's secret random value, committed as a SHA-256 hash before you bet and revealed when you rotate.
Client Seed
Your half of the randomness: change it to anything after seeing the hash and the site cannot precompute your rolls.
Nonce
The bet counter that makes each roll unique under one seed pair; gaps in the sequence are a red flag worth chasing.
The Math
House Edge
The 1% of every wager the site keeps on average, and what it compounds to over ten thousand rolls.
Payout Multiplier
Always 99 divided by win chance at a fair dice site; anything lower is a bigger edge hiding in plain sight.
Win Chance
The percentage you set with the slider, from 0.01% to 98%, and what each end of the range does to variance.
RTP
Return to player: 99% on standard dice, higher than nearly any slot, and exactly what that figure does and does not promise.
Casino Terms
Wagering Requirement
The playthrough multiple locked to a bonus, and why 40x turns most "free" money into an expected loss.
Rakeback
A rebate of the house edge on your wagers; the one perk that genuinely lowers the cost of every roll.
Max Bet
Site and bonus bet caps, and why they exist: table limits are what break Martingale progressions.
Dice Faucet
The small free crypto drip some dice sites offer so you can roll real bets without depositing a satoshi.
Related Topic Hubs
This topic connects to the hubs below in our coverage graph. Each hub
holds its own cluster of guides.
Free Dice Tools →
Put the definitions to work: recompute a roll in the verifier or watch house edge act on 10,000 simulated bets.
Dice Strategy →
Eleven betting systems analyzed with the exact edge, multiplier, and variance terms defined here.
BTC Dice Blog →
Longer guides on provably fair auditing, dice history, and US legality that build on these definitions.
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