BTC Dice Simulator
Roll with play money on committed, verifiable seeds; auto-bet with on-loss multipliers runs any system over thousands of bets.
Each tool covers one job. The simulator is a full dice table with play money: it commits a hashed server seed before you roll, computes each result with HMAC-SHA256 over your client seed and an incrementing nonce, and includes auto-bet with on-loss multipliers, so you can run a thousand-roll Martingale test in minutes without risking a satoshi. The verifier works the other direction: paste a server seed, client seed, and nonce from any real casino session and it recomputes the roll, checks the revealed seed against the hash the site committed to, and tells you whether the numbers hold up. The calculator is pure math: exact payout multipliers for any win chance, house edge comparisons, expected loss over a session, and the bust probability of a Martingale run against your table limit.
All three run entirely client-side through your browser's Web Crypto API. There is no server round-trip, which means no signup wall, no stored seeds, and results you can reproduce anywhere. The constructions match what real dice sites document on their fairness pages, so what you learn here transfers directly when you move to one of the best bitcoin dice sites, ideally with a tested strategy and a stop-loss already decided.
Free Tools 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.
| Cost | Free, no limits, no premium tier |
| Signup required | None: open the page and use it |
| Where the math runs | Entirely in your browser via the Web Crypto API |
| Construction | HMAC-SHA256(serverSeed, clientSeed:nonce) mod 10000, as real dice sites document |
| Real money involved | Never: the simulator uses play money only |
The Tools
Provably Fair Dice Verifier
Paste a server seed, client seed, and nonce to recompute any real roll and confirm the revealed seed matches its committed hash.
BTC Dice Calculator
Exact payout and house edge for any win chance, expected session loss, and Martingale bust odds against your table limit.
Related Topic Hubs
This topic connects to the hubs below in our coverage graph. Each hub
holds its own cluster of guides.
Dice Strategy →
Eleven systems with million-roll simulations; every guide links back here so you can test before you wager.
Dice Glossary →
Server seed, nonce, house edge, RTP: the precise definitions behind every field these tools expose.
Best Dice Sites →
When you are done practicing: four dice casinos we deposit at, roll at, and withdraw from before ranking.
Pick a tested dice site
Our reviewers deposit, roll, and withdraw at every site we rank. Compare the results before you play.
See the Best BTC Dice Sites