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Session Loss Calculator

This Session Loss Calculator shows the expected cost of a casino session before you play. Enter your bankroll, average bet, game speed, session length, and house edge to estimate your total action, expected loss, hourly cost, and bankroll risk.

Total Wagered Average bet × bets per hour × session hours
Expected Loss Total wagered × house edge
Net Expected Cost Expected loss + extra costs − comp value

Enter your session plan

Use realistic numbers. A small house edge becomes expensive when you make many bets.

Presets update house edge and bets per hour. Choose Custom to keep your own values.
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Roulette may be 30–50 spins/hour. Blackjack may be 50–100 hands/hour. Slots may be 400–800 spins/hour.
Use hours. Example: 2.5 for two and a half hours.
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The maximum amount you are willing to lose before quitting.
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The amount of profit where you plan to stop.
Estimated comps, cashback, free play, or rewards as a percentage of total action.
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Tips, drinks, ATM fees, transport, side expenses, or other leakage.
Advanced options
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Side bets often carry much higher house edges than the main game.
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Your expected session cost

Expected loss is the long-term average. One real session can be much better or much worse.

What the numbers mean

Simple comparison

This shows how reducing bet size or session length changes expected loss. The house edge does not have to change for your cost to drop.

Scenario Average bet Hours Total wagered Expected loss Net cost

Saved scenarios

Save up to 3 scenarios in this browser. Nothing is sent to a server.

Responsible gambling notice

This calculator is an educational tool. It does not predict the exact result of one session. Gambling involves risk, and the actual result can be much better or much worse than the expected loss. Never gamble with money needed for bills, rent, food, debt, or family responsibilities. If gambling no longer feels controlled, stop and seek help.

Session Loss Calculator FAQ

What is a session loss calculator?
A session loss calculator estimates the average mathematical cost of a casino session based on how much you bet, how fast you play, how long you play, and the house edge of the game.
How do you calculate expected casino loss?
Expected casino loss is calculated by multiplying total wagered by the house edge. Total wagered equals average bet size multiplied by decisions per hour multiplied by session hours.
Does expected loss predict what will happen today?
No. Expected loss is a long-term average, not a prediction for one session. You can win, lose a little, or lose far more than the expected loss in a single visit.
Why does bet speed matter?
Bet speed matters because every decision exposes more money to the house edge. A small edge can become expensive when hundreds of bets happen in one hour.
Can casino comps cancel out expected loss?
Usually not. Comps may reduce the net cost, but most casinos do not give back enough value to overcome the house edge, especially on high-edge games or side bets.
What is a safe gambling session budget?
A safer session budget is money you can fully afford to lose without affecting bills, debt, rent, food, or family responsibilities. The safest number is different for each person, but it should never be essential money.
Why can I lose more than the expected loss?
Expected loss is an average over many repeated sessions. Real casino results swing. Bad luck, fast play, bigger bets, and long sessions can create losses far above the average.
Is a stop-loss limit useful?
A stop-loss limit is useful only if you actually follow it. It can limit damage in one session, but it does not change the house edge or make a negative-expectation game profitable.
Play smart. Gambling involves real financial risk. If the game stops being entertainment, it's time to stop playing.
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