Where the money went
Illustrative exampleReading the ledger
Expected loss is the amount the house edge says you should lose on average: stake × bets × edge. It is a long-run average, not a forecast for one session.
Actual net is what really happened: your wins minus your losses. It can be positive even when the odds are against you.
The gap is actual net minus expected loss. A large positive gap means you got lucky relative to the odds; a large negative gap means the variance ran against you. Neither changes the underlying edge.
What this tool does and does not do
It turns a session's numbers into a clear comparison between the odds and the outcome, and exports a plain-text report. It does not predict results, guarantee wins, or advise on how much to bet. Gambling carries real financial risk, and the house edge means the expected value is negative over time.
How to use it with your own numbers
Replace the sample stake, bet count, house edge, and net result with your own. The chart and report update as you type. Use the export button to save a text summary you can keep or share.
Supported inputs and limits
Stake and bet count are positive numbers; the house edge is a percentage from 0 to 20; the net result can be any number, positive or negative. All arithmetic is done locally in your browser.