Sports All tools

Expected Value (EV) Calculator

Check if a sports bet is +EV using your win probability and the odds.

Expected value

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Worked result from default inputs (server-side math).

Stake	Decimal	Your win %	Book implied	EV ($)
10.00	2.10	52%	47.62%	+0.92

Educational maths only. Not betting advice. Confirm live odds and terms with the operator. 18+.

What does +EV mean here?

Positive expected value on your assumed win probability versus the odds. Your probability estimate can be wrong; the tool does not create edge.

Convert American, decimal, and fractional odds with implied probability.

Turn odds into win probability and reverse probability into fair odds.

Size a stake from edge, odds, and bankroll (full and fractional Kelly).