Bankroll Calculator

How large does my bankroll need to be to survive a session of this length?

Any currency or coin. The bankroll comes back in the same unit.
The single input people underestimate most. Autoplay reaches a thousand rounds in well under an hour.
Sets the expected loss the bankroll has to absorb before any swing is added.
Your assumption, not our measurement. Studios publish volatility as a word rather than a number. Roughly: 1–2 for even-money table bets, 3–6 for low and medium slots, 10–20 for high-volatility slots and buy features.
How often the bankroll should be enough. It is never all of them: no finite bankroll survives every session.
Bankroll the session needs352.10

The arithmetic,
line by line.

Every step of the Bankroll Calculator, for the figures currently entered
StepValue
Expected loss at 96.00% over 1,000 rounds40.00
Swing buffer — z 1.6449 × SD 6.0 × √1,000312.10
Bankroll that lasts 95% of sessions352.10
As a multiple of one round's stake352×
expected loss = stake × rounds × (100 − RTP) ÷ 100
swing buffer  = z × SD × stake × √rounds
bankroll      = expected loss + swing buffer

Bankroll Calculator by Solaspins