ROI Calculator
Measure the real return of your bets and place your performance on a clear scale.
Calculate ROI %
Measure the return on your bets over a given period
💡 Total profit = Winnings - Losses across all your bets
📚 Full guide
Understanding ROI
The true measure of your performance, beyond profit alone
📈What is ROI?▼
ROI (Return On Investment) is the return on your bets expressed as a percentage of what you staked.
ROI = (Profit ÷ Total stake) × 100
Example: you staked 4300€ in total and won 520€ net. Your ROI = 520/4300 × 100 = 12.09%.
ROI is far more telling than gross profit: winning 1000€ by staking 100,000€ (ROI 1%) has nothing to do with winning 1000€ by staking 10,000€ (ROI 10%).
🎯Why it's THE metric that matters▼
Many bettors brag about their winnings without mentioning their stakes. ROI sets the record straight:
🎯 Comparable between bettors
A big bettor making 15% ROI on 50,000€ staked is less efficient than a small bettor making 30% on 5,000€.
📊 Evaluate a strategy
Your monthly ROI tells you if your method works, regardless of your bankroll size.
💎 Forecast your gains
With a stable ROI, you can project your gains: "if I stake 1000€/month at 5% ROI, I make 50€/month".
📏What is a GOOD ROI?▼
Many amateurs think you should aim for 50%+. In reality, professional sports betting runs around 2-8%:
🏆 ROI ≥ 10%
Pro/elite level. Rare and remarkable, often on modest volumes or over a short period.
✅ ROI 5-10%
Very good level. Typical of a serious bettor following a disciplined method (value betting, selective tipsters).
👍 ROI 2-5%
Profitable. You beat the bookmakers but modestly. That's already an excellent result in the long run.
⚠️ ROI 0-2%
Breakeven. A single bad streak can put you in the red. To watch.
❌ ROI < 0%
Losing. The majority of amateur bettors. The strategy needs revising.
Note: bookmakers typically have a 3-7% margin (RTP 93-97%). A positive ROI means you beat that margin.
📅Over how many bets is it reliable?▼
ROI is an average: the more bets you have, the more reliable it is. An ROI calculated over 10 bets doesn't mean much.
❌ < 100 bets
Too unreliable, far too much variance. Draw no conclusions.
⚠️ 100-500 bets
First visible trend but still a lot of randomness.
✅ 500-1000 bets
Reliable ROI. You can evaluate your strategy.
🏆 1000+ bets
Very reliable ROI. Represents your true skill level.
Pro tips
📌 A stable 3-5% ROI over 1000+ bets = you're an excellent bettor
📌 Beware of ROIs > 30% on a small sample: high probability of regression
📌 Calculate your ROI by bet type (1X2, Over/Under, BTTS...) to identify your strengths
📌 ROI mechanically drops with accumulators (margin multiplied)
📌 A pro bettor aims for 5-8% ROI in the long run, no more
📌 Yield (= ROI) is the true measure of skill, not absolute profit
📌 Track your ROI month by month to detect trends (hot/cold sport)