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Bookmaker margin calculator

Every market has a built-in margin (the "overround") — the bookmaker's edge. Enter the decimal odds for each outcome to reveal it. Lower margin = better value for you.

A two-way market around 2-4% is sharp; 8%+ is poor value. Related: how bookmakers set odds · low-margin bookmakers. 18+ · Bet responsibly.

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This is a regulated market, so we only advertise operators that hold a local licence here. The bookmakers we review are licensed elsewhere, and we won't promote them to you — so you'll see no betting offers on this page. Our reviews, licence checks and guides stay available — we've removed the advertising, not the information. 18+ · Support and safer-gambling tools.