Your sports betting ROI is the most honest measure of whether you're winning or losing. Most bettors avoid calculating it because they'd rather not know. Here's how to do it correctly.
The ROI Formula
ROI = (Total Profit ÷ Total Amount Wagered) × 100
Total Profit = Total winnings from bets won, minus total losses from bets lost Total Wagered = The sum of all stakes placed (not the amount risked, but the actual bet amount)
A Simple Example
You placed 100 bets at $110 each (standard -110 odds):
- Total wagered: 100 × $110 = $11,000
- You won 55 bets: 55 × $100 = $5,500 profit
- You lost 45 bets: 45 × $110 = $4,950 loss
- Net profit: $5,500 - $4,950 = $550
- ROI: $550 ÷ $11,000 = 5.0%
At a 55% win rate on -110 odds, you have a 5% ROI — solid performance.
Break-Even ROI by Odds
At -110 odds: Win rate needed = 52.38% (ROI = 0%) At -105 odds: Win rate needed = 51.22% (ROI = 0%) At -115 odds: Win rate needed = 53.49% (ROI = 0%)
Why Manual Calculation Is Unreliable
Manual ROI calculation requires recording every single bet accurately — no cherry-picking, no forgetting losses, no rounding in your favor. Most bettors who calculate ROI manually either undercount losses or fail to maintain the record consistently.
The most accurate approach: an app that auto-imports every bet from your sportsbooks. Your ROI is calculated continuously, automatically, and honestly.
What Good ROI Looks Like
- Below 0%: You're losing money — normal for casual bettors
- 0-2%: Near break-even — improving
- 2-5%: Strong recreational performer
- 5%+: Professional-level performance (very rare)
[See your real ROI calculated automatically in Oddible →]
