The question is whether your bet size makes the timer reasonable.
Interactive Tool
How Long Will Your Slot Bankroll Last?
Stress-test your bankroll against bet size, RTP, volatility, and spin count before the reels turn curiosity into a bill.
Most slot bankrolls die slowly. Some explode immediately. Use the calculator before the session starts so your spin size matches the risk you are actually taking.
It will not change the edge, but it can change how fast variance hits.
Set the stop point before the session starts.
Calculator
Enter your slot session plan
Simulate many session runs so you can estimate how often your bankroll survives the target spins and how much volatility can swing your cash.
This calculator compares bankroll pressure and survival odds. It is a modeled risk estimate, not a prediction of a specific spin outcome.
Estimated survival odds0%
Average session RTP0%
Likely spin range (10–90% percentile)-
Simulation trials0
Ruin risk0%
Median ending bankroll$0.00
10th percentile bankroll$0.00
90th percentile bankroll$0.00
Spin range is estimated from the 10th–90th percentile of simulated session lengths, not a guaranteed outcome.
Ruin risk is the model's true simulated bust probability from the session Monte Carlo.
Why this matters
Ruin risk tells you how often the bankroll hit zero before the target spins, while average RTP measures the long-run expected loss rate. You can still survive a session with a negative average RTP, but a higher ruin risk means your bankroll is more likely to run out during one normal slot session.Session RTP is a long-run average, not a guarantee for a single session. Focus on ruin risk if you want a safer bankroll path.
These results are based on the site’s slot model presets and calibrated payout distributions. They are illustrative of a modeled slot environment, not exact results from any specific casino machine.
How this tool works
This calculator estimates how quickly a slot bankroll can come under stress.
- Estimates: Bankroll survival pressure, potential drawdowns, and session ruin risk.
- Assumes: Your bankroll, bet size, spin target, RTP, volatility/risk preset, and simplified modeling.
- Does not guarantee: Bankroll survival or prediction of outcomes on real casino machines.
For limits, warning signs, and help resources, read our responsible gambling guide.
Interpretation
Read the result like a risk report
Bet size drives bust risk
Small RTP differences matter over time, but oversized spins can end a session before the long-run average has any room to show up.
Volatility widens the range
High volatility creates wider outcome ranges around the same average return, which means longer droughts and sharper drawdowns.
One win is not enough
A single big hit can save one session, but it does not change the steady edge against your bankroll over many spins.
Next step: compare strategy across tools
Use this survival estimate, then run the same scenario in the slot simulator for a visual streak profile.
Keep Learning
Related slot pages
Use these pages to compare survival estimates against RTP, volatility, and simulated streaks.