Tools
Dice calculators and tools
These dice calculators answer the questions that come up when you plan a betting strategy: how much bankroll a martingale needs, how likely a losing streak is, what a win chance pays and how much the house edge costs over a session. Next to the main calculator there are four focused calculators, a seed verifier, the simulator and a script library. All of them run in your browser and need no account.
Crypto dice calculator
The full strategy calculator. Enter win chance, bankroll and bet progression to get the payout, the longest losing streak you can survive, risk of ruin over a horizon and a bankroll projection. Doubling 1 from 1,000 at 49.5% has a 99.9975% risk of ruin over 10,000 rolls.
Open crypto dice calculatorMartingale calculator
Bankroll needed for N losses in a row, the next bet and the total lost after N losses, with a table for 1.5x to 3x. A balance of 1,000 with a base bet of 1 survives 9 losses when doubling.
Open martingale calculatorLosing streak calculator
The exact chance of N losses in a row, both for your next N rolls and anywhere in a session of T rolls. At 49.5% a run of 10 losses somewhere in 10,000 rolls has a 99.53% chance.
Open losing streak calculatorDice payout calculator
Convert between win chance, payout multiplier and the roll under or roll over target at any house edge. At 1% edge, 49.5% pays 2x. Includes a table of common payouts from 1.01x to 9,900x.
Open dice payout calculatorHouse edge calculator
Expected loss from the amount you wager and the house edge, with optional rakeback. A second table compares flat betting with martingale progressions at the same number of rolls.
Open house edge calculatorProvably fair dice verifier
Recompute dice rolls from a revealed server seed, client seed and nonce with HMAC-SHA256 (Stake-style) or HMAC-SHA512, and check the server seed hash. Seeds stay in your browser.
Open provably fair dice verifierDice bot simulator
Write a Lua strategy and run millions of provably fair rolls in your browser with a live balance chart. Use it to see how the numbers from the calculators play out in practice.
Open dice bot simulatorLua dice bot scripts
Free dice bot scripts for martingale, Paroli, d'Alembert, Labouchere and other systems, each with its full source and the streak math for its default settings.
Open lua dice bot scripts
Odds and guides
For payouts and streak odds at one win chance, see dice odds by win chance. The crypto dice strategy guide explains the ideas behind the numbers, starting with risk of ruin and the house edge.
Every calculator uses the same formulas as the DiceSim engine, and the worked examples on each page are computed by the engine when the page is rendered, so they match what the tools show.