Roulette calculator
Roulette Bankroll Calculator
Estimate session exposure from bankroll, unit size, spin count, wheel type, and bet type.
Quick answer
A bankroll calculator can show how many flat-bet units you have, the amount you plan to wager, and the average expected loss. It cannot guarantee how long a bankroll will last.
Calculate bankroll exposure
Bankroll exposure result
- Unit cushion
- 40.0 units
- Risk pressure
- Moderate pressure
- Planned amount wagered
- $500
- Win chance per spin
- 48.65%
- Average expected result
- -$13.51
A straight losing run of about 40 flat bets would consume this bankroll at the selected unit size.
Common swing estimate
Based on the selected bet and spin count, one rough standard-deviation swing is:
This range is descriptive, not a promise. Actual sessions can land outside it.
How to lower pressure
- Lower the unit size relative to bankroll.
- Use European roulette when available.
- Prefer lower-variance bets if session smoothness matters.
- Set stop points before the session starts.
Connect bankroll to expected value
Bankroll planning starts with unit size and session length, but expected value explains the average long-run cost of the total amount wagered. Compare this page with the roulette expected value calculator and the house edge guide.
Related roulette guides
Test bankroll settings in Free Play
Try lower and higher unit sizes with play money to see how session swings feel.
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