Value Bet Calculator

Calculate Implied Odds, Fair Value & EV in One Click.

Use our free Value Bet Calculator to work out potential returns, implied odds, no-vig win percentages and expected value (EV). Make better betting decisions backed by data.

🎯 How does it work?

This Value Bet Calculator helps you figure out whether a bet offers real value. Just enter your stake and odds, then choose either the opposing odds (e.g. the other team or outcome) or your own estimated chance of winning.

We’ll calculate your potential return, the implied probability and - if applicable - the no-vig fair odds. You’ll also see the expected value (EV) of your bet so you can make informed decisions. ✅ Tip: Fill in either the opposing odds or your estimated win % - not both. We’ll do the maths from there.

FAQ's

Q: What’s Expected Value (EV)?

A: Expected Value (EV) is a long-term indicator of whether your bet has a positive or negative edge. A positive EV means the odds are in your favour, while a negative EV suggests you're overpaying compared to the true chance of winning.

Example: If your EV is +£1.20, it means that - on average - you’d make £1.20 profit per £10 bet if you repeated that same bet hundreds of times.

Q: What are No-Vig Odds (or No-Vig Probability)?

A: Bookmakers build a profit margin into their odds - that’s the "vig" or "juice". No-vig odds remove that margin to show the true implied probability of each outcome. It’s a way of seeing what the odds should be if the bookie wasn’t taking a cut.

For example, if two teams are both priced at 1.91, the bookie is saying each has a 52.36% chance - which adds up to more than 100%. The no-vig version adjusts this so the total probability is 100%, giving a fairer view of the matchup.

Q: How do I estimate win %?

A: If you don't have opposing odds to work with then you can enter your own estimated win chance based on form, stats, expert opinion or historical data. It’s subjective, but better than guessing blindly. If in doubt then just enter the opposing odds - our Value Bet Calculator will use those to reverse-engineer a fair win percentage using no-vig logic.

Q: Why is this better than just calculating returns?

A: Most betting sites show your return, but not whether the odds are fair. Our calculator adds the value layer by telling you whether you're getting a good deal based on real probability. That’s what separates casual bets from smart ones.

Q: Does a high Expected Value (EV) mean this bet will probably win?

A: Not necessarily. A high EV means the bet has long-term value, not a high chance of winning on any single occasion.
For example, underdogs can have a high EV if the odds offered are generous - but they’ll still lose most of the time. This tool helps you spot value, not guaranteed outcomes.

Enter Your Bet Details

Enter either opposing odds or your win estimate - not both.

Your Bet Breakdown

Total Return: £0

Profit: £0

Implied Probability: 0%

No-Vig Probability: 0

Fair Odds (No-Vig): 0

Expected Value: 0 (0)

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