Wheel
Table
Tap a number or an outside bet to place the chip you picked. Pays 35 to 1 on a single number, 2 to 1 on dozens and columns, evens on red, black, odd, even, 1-18 and 19-36. Play money only.
- Maths reviewed by Josh Miller
- Tested by Diana Westfield
The reverse martingale calculator flips the doubling system round: you double after a win, not a loss, and go back to your base bet the moment you lose. Here it banks the profit after four wins in a row. With £5 on red, four straight wins is +£75; anything less loses your £5. The CasinoCalcs simulator above plays that out over thousands of spins with your own bankroll and table.
Reverse martingale calculator: one run
| Win in a row | Bet | Up so far |
|---|---|---|
| 0 | £5 | £0 |
| 1 | £10 | +£5 |
| 2 | £20 | +£15 |
| 3 | £40 | +£35 |
| 4 (bank it) | back to £5 | +£75 |
Lose at any step and you’re back to −£5 for that run, since the winnings were all riding on the bet. Four reds in a row comes up about 5.6% of the time, roughly 1 in 18. So for every run that pays £75, around 17 cost you £5 each, £85 in all. The difference, about £10 over 18 runs, is the house edge doing its usual job.
Why people like it anyway
Your own money at risk is never more than one base bet per run, which is the opposite of the martingale’s scary doubling of losses. Sessions drift down slowly and the occasional streak makes for a good night. Stretch the cap to five or six wins and the wins get bigger and rarer, but the average is unchanged. The cap of four used here is the same idea as the Paroli system, which stops after three wins; the betting systems simulator has both.
For the original doubling-after-losses version, see the martingale calculator, and for the house edge on every bet, the roulette cheat sheet.
Streaks are easy to spot afterwards and impossible to predict. BeGambleAware.org has free support if you need it.