Bankroll Calculator
Find out how many losses in a row your bankroll can take before a betting progression runs out. Enter your bankroll, starting bet and how much you increase your stake after each loss. The calculator shows every step of the progression, with bet sizes and total losses, up to the point where you can't afford the next bet. It works for the classic Martingale (doubling after every loss) and for any other multiplier.
Your setup
Your results
| Step | Bet size | Net loss |
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How to use the bankroll calculator
- Pick your currency. USD, GBP, EUR, CAD and AUD are supported.
- Enter your total bankroll. This is the full amount you’re prepared to lose in the session.
- Set your base bet. This is your stake at the start of each sequence and after every win.
- Choose your multiplier. 2 is the classic Martingale, where you double after each loss. A lower number like 1.5 grows more slowly but doesn’t recover all your losses with one win. A higher number recovers faster but runs out sooner.
- Add a return on loss (optional). If you get cashback or rakeback that returns part of each losing stake, enter it as a percentage to see how it stretches your bankroll.
The results table shows each step’s bet and your running total loss. The last row is the bet you couldn’t afford to place.
What the Martingale actually risks
On an even-money bet, these are the chances of a new sequence losing several times in a row:
| Losses in a row | European roulette | American roulette | Baccarat (Banker, ties ignored) |
| 5 | 3.6% (1 in 28) | 4.0% (1 in 25) | 2.9% (1 in 34) |
| 7 | 0.94% (1 in 106) | 1.1% (1 in 89) | 0.71% (1 in 141) |
| 9 | 0.25% (1 in 403) | 0.31% (1 in 324) | 0.21% (1 in 476) |
| 10 | 0.13% (1 in 784) | 0.16% (1 in 613) | 0.09% (1 in 1,174) |
Those odds look small for any single sequence, but you play many sequences in a session. Over 1,000 spins of European roulette, the chance of seeing at least one run of nine straight losses is roughly 70%. That’s enough to end the progression at the default settings. A typical $1 Martingale player wins around $400 in small amounts over roughly 400 sequences, then gives back $511 in one streak.
Why no progression beats the house edge
Changing the size of your bets doesn’t change the odds of any single bet. Each spin or hand is independent, and each bet carries the same house edge whether it’s your first stake or your eighth doubled one. Progressions only change when you win and how much is at risk. Most tables also have a maximum bet, which can end a progression before your bankroll does.
Using the calculator responsibly
The best use of this calculator is to see your risk before you play. Decide on your bankroll first, check how many losses it can cover, and treat a busted progression as the end of the session, not a reason to top up. To try a system with no money at stake, use the Roulette Spin Simulator, or plan a full system with the Progression App.
Bankroll calculator FAQs
What is a bankroll calculator?
A tool that shows how far your money stretches under a betting plan. Ours calculates how many consecutive losses a progression system can survive with your bankroll, base bet and multiplier.
How much bankroll do I need for the Martingale?
To survive N losses in a row when doubling, you need your base bet × (2^N − 1). With a $1 base bet that’s $63 for 6 losses, $511 for 9 and $1,023 for 10. Even then, a long enough losing streak will eventually exhaust your bankroll.
Does the Martingale strategy work?
It wins small amounts often and loses large amounts occasionally. Over time the house edge applies to every bet you place, so the system doesn’t create a long-term profit.
What does “return on loss” mean?
The percentage of each losing stake you get back, for example through cashback or rakeback. The calculator subtracts it from your running losses, which lets you cover more steps.
Can I use it for baccarat or blackjack?
Yes. It works with any bet you increase after a loss. For baccarat, pair it with our Ultimate Baccarat Tracker to see how often losing streaks show up in real shoes.
Play responsibly
Set your budget before you play and stop when it’s gone. If gambling stops being fun, call 1-800-GAMBLER or visit the National Council on Problem Gambling.