How to Use the Betting ROI Calculator
Enter the total number of bets you placed, the total amount staked across all those bets, and the total money returned (including stakes on winning bets). The calculator instantly computes your return on investment.
Understanding Your ROI
- Positive ROI — You are beating the bookmaker. Anything above 0% is profitable.
- ROI of 3–10% — Professional range. Very difficult to sustain long-term.
- ROI of −5% — Typical recreational bettor. Losing money at a steady rate.
- ROI below −15% — High-risk approach or poor value selection.
Why Sample Size Matters
With fewer than 200–300 bets, your ROI is dominated by luck, not skill. A bettor can be up 20% after 50 bets purely by variance, only to regress to the mean over 1,000 bets. Use this calculator to track your ROI as your sample grows.
ROI Formula
ROI (%) = (Total Returns − Total Staked) ÷ Total Staked × 100
For example: Staked £1,000, received £1,080 back → ROI = (1080 − 1000) / 1000 × 100 = +8%
Frequently Asked Questions
What is a good ROI in sports betting?
A positive ROI in sports betting is rare — even 3–5% long-term ROI is considered excellent. Most recreational bettors have a negative ROI of −5% to −15%. Professional bettors typically achieve 3–10% ROI over very large sample sizes (thousands of bets).
How is sports betting ROI calculated?
Betting ROI = (Total Returns − Total Staked) ÷ Total Staked × 100. If you staked $1,000 and received $1,050 back in total returns, your ROI is (1050 − 1000) / 1000 × 100 = 5%. "Returns" means all money received back, including the stake on winning bets.
What is the difference between ROI and yield?
In sports betting, ROI and yield are often used interchangeably. Both equal profit ÷ total staked × 100. The term "yield" is more common in UK/European betting markets, while "ROI" is standard in North America. The calculation is identical.
How many bets do I need for a reliable ROI?
Statistical significance in betting typically requires at least 500–1,000 bets. With fewer bets, your ROI figure is heavily influenced by variance. Consider your result preliminary until you have at least 300 bets, and treat it as directionally meaningful after 500+.
Should I include each-way bets and void bets?
For the most accurate ROI: include void bets (they return your stake, so count the stake in "staked" and the returned stake in "returns"). For each-way bets, include the full stake and the full return received. The calculator works with your total figures regardless of bet type.