Win Rate Calculator — Break-Even Rate & Betting Edge
Calculate your actual win rate, break-even win rate, and betting edge from your historical results. Enter your total bets, wins, stake, and average odds to instantly see your profitability, ROI, and how many wins you need to break even.
Odds format
Saved for all betting calculators
Total number of bets placed
Number of winning bets
Amount wagered per bet
e.g. -110 or +150
Your Win Rate
55.00%
Break-Even Rate
50.00%
Edge
+5.00%
Required Wins (B/E)
50
Profitable?
Yes
Total Staked
$1,000.00
Net Profit / Loss
+$100.00
Total Return
$1,100.00
ROI
+10.00%
Estimated CLV Edge
+5.00%
Bettor Profile
Likely Sharp
CLV measures whether you consistently beat the closing line. A positive CLV over 50+ bets is the strongest indicator of a profitable bettor. This is an estimate based on your win rate vs break-even.
Last reviewed · How we check our calculators
How to Use the Win Rate Calculator
Using the win rate calculator is straightforward. Enter four values: your total number of bets placed, the number of those bets that won, your stake per bet in dollars, and the average odds you typically bet at, in the odds format you picked (American, decimal, or fractional). Your results update instantly as you type.
The calculator compares your actual win rate against the break-even win rate implied by your odds. If your actual win rate exceeds the break-even rate, you have a positive edge and your betting record is profitable. If it falls short, you are losing money over the long run.
The edge figure is the most important output — it tells you how much of an advantage (or disadvantage) you have over the bookmaker's implied probability. A positive edge of even 2–3% is considered excellent in professional sports betting. Use the required wins figure to understand exactly how many bets out of your sample needed to win just to break even.
The Formula
The win rate calculator uses the following formulas:
- Actual Win Rate: (Wins ÷ Total Bets) × 100
- Break-Even Win Rate: (1 ÷ Decimal Odds) × 100
- Edge: Actual Win Rate − Break-Even Win Rate
- Net Profit: (Wins × Stake × (Odds − 1)) − (Losses × Stake)
- ROI: (Net Profit ÷ Total Staked) × 100
- Required Wins to Break Even: ⌈Total Bets ÷ Decimal Odds⌉ (ceiling)
The break-even win rate is the implied probability embedded in the odds. At 2.0 decimal odds (even money), a bookmaker implying fair odds would require you to win exactly 50% of bets to break even. Because bookmakers include a margin (vig), the true implied probability is slightly higher than 50% — meaning you need a win rate above the break-even threshold to profit.
The profit formula counts the net profit on winning bets (stake × (odds − 1)) and deducts the full stake on every losing bet. This gives you your true net P&L over the sample, which can then be expressed as a percentage of total money wagered (ROI).
Practical Examples
Example 1 — Profitable Record at Even Money
A bettor places 100 bets at 2.0 decimal odds (even money) with a $10 stake per bet. They win 57 and lose 43.
- Actual Win Rate: (57 ÷ 100) × 100 = 57%
- Break-Even Win Rate: (1 ÷ 2.0) × 100 = 50%
- Edge: 57% − 50% = +7%
- Net Profit: (57 × $10 × 1) − (43 × $10) = $570 − $430 = +$140
- Total Staked: 100 × $10 = $1,000
- ROI: ($140 ÷ $1,000) × 100 = +14%
- Required wins to break even: ⌈100 ÷ 2.0⌉ = 50
This bettor is performing well above break-even. A 7% edge and 14% ROI over 100 bets suggests a genuinely profitable strategy, though sample size should be increased before drawing firm conclusions.
Example 2 — Chasing Longshots at 5.0 Odds
A bettor places 200 bets at 5.0 decimal odds with a $5 stake. They win 35 and lose 165.
- Actual Win Rate: (35 ÷ 200) × 100 = 17.5%
- Break-Even Win Rate: (1 ÷ 5.0) × 100 = 20%
- Edge: 17.5% − 20% = −2.5%
- Net Profit: (35 × $5 × 4) − (165 × $5) = $700 − $825 = −$125
- Total Staked: 200 × $5 = $1,000
- ROI: (−$125 ÷ $1,000) × 100 = −12.5%
- Required wins to break even: ⌈200 ÷ 5.0⌉ = 40
Despite winning 17.5% of bets — which sounds reasonable for 5/1 shots — the bettor is losing money because they need to win at least 20% to break even. The negative edge of 2.5% represents a typical bookmaker margin eroding long-run returns.
Frequently Asked Questions
A 'good' win rate depends entirely on the odds you are betting at. At 2.0 (even money) odds, the break-even win rate is 50% — so anything above 52–53% is considered strong after accounting for bookmaker margin. At higher odds of 5.0, the break-even rate is 20%, and you need to win above that consistently to profit. The key metric is your edge (actual win rate minus break-even win rate) rather than the raw win rate figure. Professional bettors typically target a long-run edge of 2–5%.
The break-even win rate is the minimum win percentage needed to avoid losing money at a given set of odds. It is calculated as (1 ÷ Decimal Odds) × 100. At 2.0 odds it is 50%; at 3.0 odds it is 33.33%; at 10.0 odds it is 10%. If your actual win rate equals this figure, your long-run profit is exactly zero (before bookmaker margins). Because bookmakers build in a margin of 3–8%, the true required win rate is slightly higher than the break-even formula suggests.
Statisticians generally recommend a minimum of 500–1,000 bets before drawing conclusions about whether your edge is real. With fewer bets, variance (luck) can make a losing strategy look profitable, or vice versa. At 100 bets, even a skilled bettor can appear to lose money due to a bad run. Use the win rate calculator to track your running record, but avoid making strategy changes based on samples under 200–300 bets.
Required wins is the minimum number of bets in your sample that needed to win just to break even — it is calculated as the ceiling of (Total Bets ÷ Decimal Odds). For example, with 100 bets at 2.0 odds, you need at least 50 wins to avoid losing money. If you won 48, you fell 2 wins short of break-even. This metric is useful for understanding how close you are to profitability and for comparing your actual win count directly against the minimum required.
Yes. The calculator works for any situation where you have a known payout multiplier and a win/loss record. For casino games, convert the house payout to decimal odds (e.g. a 35:1 roulette bet is 36.0 in decimal). For poker, the concept is less direct because odds vary by hand, but you can use it to evaluate a specific bet type (e.g. all-in situations). The formula is universal — actual win rate vs. break-even win rate determines whether you have an edge.
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