A win percentage calculator answers the first question every tipster gets asked: how often do you actually win? Put in 46 wins and 54 losses and the free calculator above says 46.0%. On its own that number means little. At average odds of 2.05 you need 48.8% just to break even, so this record is 2.8 points short and down £57 at £10 a bet.
That gap is the whole point. A 35% strike rate can be excellent at odds of 3.5, and a 60% strike rate can lose money backing favourites at 1.6.
Win percentage calculator: strike rate against break-even
Strike rate is wins ÷ (wins + losses). Pushes, voids and refunded bets stay out of it, because you got the stake back. The break-even rate is 1 ÷ your average decimal odds:
| Average odds | Fractional | Break-even win rate |
|---|---|---|
| 1.50 | 1/2 | 66.7% |
| 1.91 | 10/11 | 52.4% |
| 2.00 | evens | 50.0% |
| 2.50 | 6/4 | 40.0% |
| 4.00 | 3/1 | 25.0% |
If your strike rate sits above the line for the odds you take, you’re winning. Below it, you’re paying the bookie’s margin and then some.
How many bets before it means anything?
Fewer than most people think it takes. After 100 bets at even money, a bettor with no edge at all lands outside 40% to 60% only about one time in twenty, so anything inside that range could be pure luck. A hot month proves very little. A record of 500 or 1,000 bets starts to show real skill, and even then the ROI tells you more than the strike rate.
Log the bets as you go in the bet tracker, which works out strike rate, yield and ROI by sport. To see whether one price is good value before you bet, use the implied probability calculator, and the expected value calculator puts a figure on the edge.
Winning more than break-even? The luck vs skill calculator shows how often luck alone gives a record like yours.
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