Calculate the optimal bet size for your crypto casino bankroll using flat betting, percentage betting, and Kelly criterion. Stop busting your roll.
Different strategies match different risk tolerances and game types. Here is how each works.
Bet the same fixed amount every time. Simple, easy to track, and limits variance. Best for slots and casual players who want a steady session.
Bet a fixed percentage of your current bankroll. Bet sizes shrink when you lose and grow when you win. Slower to bust, slower to recover.
Mathematically optimal bet size based on your edge. We use half-Kelly to reduce variance. Only works when you can accurately estimate your true win probability.
Divide your bankroll into units (e.g. 100 units) and bet one unit at a time. Common in sports betting. Simple bankroll protection.
| Risk Level | % of Bankroll per Bet | Best For | Bust Risk |
|---|---|---|---|
| Conservative | 0.5% - 1% | Slots, long sessions | Very low |
| Moderate | 1% - 2% | Table games, sports bets | Medium |
| Aggressive | 2% - 5% | High edge, short sessions | High |
Set your bankroll before you deposit and stick to the bet size the calculator recommends. Read our Bitstarz review for reliable high-RTP slots, Bets.io review for table games, and Cryptocasino review for flexible limits. Practice without risk first in our free crypto casino games.
Alex deposits $1,000 worth of crypto and chooses a 1% flat bet. That means every slot spin is $10. With an average slot RTP of 96%, the expected loss per spin is about $0.40.
If Alex runs 300 spins — about one hour of play — the expected total loss is $120. The bankroll drops to $880 on average, but due to variance it could be anywhere from $400 to $1,800 in the short term. By sticking to 1% bets, Alex has roughly 100 bets of runway before the bankroll is gone, which is enough to survive normal downswings.
If Alex had bet 5% ($50 per spin), the expected loss per spin would be $2, but the bankroll would only survive about 20 losing spins in a row. That is why conservative bet sizing matters.
| Method | Best For | Pros | Cons |
|---|---|---|---|
| Flat Betting | Slots, casual play | Simple, predictable variance | Does not adapt to bankroll swings |
| % of Bankroll | Long sessions, unknown length | Auto-scales risk up and down | Bets shrink during losing runs |
| Kelly Criterion | When you have an edge | Mathematically optimal growth | Requires accurate win probability estimate |
| Unit Betting | Sports bettors, discipline | Easy to track, protects bankroll | Units feel abstract for casino games |
Chasing losses: Increasing bet size after a losing streak is the fastest way to bust. Stick to the percentage the calculator gives you even when you are down.
Betting too big after wins: A hot streak does not change the house edge. Lock in some profit and keep bet sizes consistent.
No stop-loss: Decide before you play how much you are willing to lose in one session. When you hit that number, stop.
Mixing gambling money with living money: Only deposit crypto you can afford to lose. Never gamble with rent, bill money, or borrowed funds.
Set two numbers before you open a game: the maximum you are willing to lose and the profit amount at which you will quit. A common approach is a 50% stop-loss and a 30-50% win goal.
On a $1,000 bankroll, that means stopping if you drop to $500 and cashing out if you reach $1,300-$1,500. Discipline protects more money than any betting system.
After setting your bet size, check whether a bonus is mathematically worth taking with our Bonus EV Calculator. If you are depositing crypto, see the true cost with our Crypto–Fiat Calculator, or compare odds formats with the Odds Converter.
