Fibonacci System Calculator
See how the 1-1-2-3-5 progression stakes and recovers.
| Step | × unit | Bet | Cumulative loss |
|---|---|---|---|
| 1 | 1× | 10 ₽ | 10 ₽ |
| 2 | 1× | 10 ₽ | 20 ₽ |
| 3 | 2× | 20 ₽ | 40 ₽ |
| 4 | 3× | 30 ₽ | 70 ₽ |
| 5 | 5× | 50 ₽ | 120 ₽ |
| 6 | 8× | 80 ₽ | 200 ₽ |
| 7 | 13× | 130 ₽ | 330 ₽ |
| 8 | 21× | 210 ₽ | 540 ₽ |
| 9 | 34× | 340 ₽ | 880 ₽ |
How it works
The Fibonacci system follows the sequence 1, 1, 2, 3, 5, 8, 13… — each bet is the sum of the two before it. You step one number forward after a loss and two numbers back after a win, betting the base unit times the current Fibonacci number.
Because each number equals the previous two, a single win recovers the last two losing bets and leaves a small profit. It is gentler than Martingale, but the bets still climb and a long losing run grows the stake faster than a flat bet ever could.
Fibonacci System Calculator
The Fibonacci betting system stakes along the famous sequence 1, 1, 2, 3, 5, 8, 13 — where each number is the sum of the two before it. This free calculator lays out the staking ladder, shows how many losses your bankroll can absorb, and explains how a single win steps you back down the sequence.
How the Fibonacci system works
You bet the base unit times the current Fibonacci number. After a loss you move one step forward in the sequence; after a win you move two steps back. The two-step retreat matters: because each number is the sum of the previous two, one win recovers the last two losing bets and leaves a small profit.
It is usually played on even-money bets, where a win returns your stake plus the same again, which is exactly what the back-two-steps rule is built around.
Why it is gentler than Martingale — but not safe
Unlike Martingale, which doubles every loss, Fibonacci grows additively, so the bets climb more slowly and the bankroll lasts longer. That makes the ride feel safer.
It is not. The expected value of each individual bet is unchanged by the staking pattern — on a negative-edge game the system still loses over time. A long enough losing streak marches you deep into the sequence, where the stakes become large and a table limit or an empty bankroll ends the run.
What is the Fibonacci betting system?expand_more
A negative progression where stakes follow the Fibonacci sequence (1, 1, 2, 3, 5, 8…). You step one number forward after a loss and two numbers back after a win.
Does the Fibonacci system work?expand_more
It controls the size of bets better than Martingale, but it cannot overcome a negative expected value. Over many bets it loses at the same rate as flat betting — it just redistributes when the losses land.
Why do you go back two steps after a win?expand_more
Because each Fibonacci number equals the sum of the previous two, retreating two places means one win cancels the previous two losing bets and locks in a small gain.