Payout & arbitrage calculator

Enter a price for each outcome (they can come from different bookmakers) to see the payout and how to split the stake.

What payout means

Payout is the share of your money that comes back whatever happens, if you split a stake across every outcome in proportion to 1/odds. The formula is 1 ÷ (1/odds₁ + 1/odds₂ + …), and this calculator, the site's combo payouts and the "payout" column of the odds tables all use it. The split column is each outcome's 1/odds as a share of the total; staking in those proportions makes the return the same whichever outcome wins.

The bookmaker's margin

Add up the implied probabilities (1/odds) of one bookmaker's prices for every outcome and the total is usually above 100%. The excess is the margin built into the prices, and the payout is roughly 100% minus the margin. If both outcomes are priced at 1.90, for example, the implied probabilities add up to 105.3% and the payout is 95.0%. Margins differ between bookmakers, so the same match has a different payout at each; the average payout ranking is on the bookmaker ranking.

Why combinations over 100% are rare

Taking the best price for each outcome from different bookmakers lifts the payout above what any single bookmaker gives, and occasionally above 100% (arbitrage). But every bookmaker has a margin and they watch each other's prices, so such combinations usually disappear within minutes. Bookmaker rules (voids, extra time), stake limits and differences in when prices were updated mean the numbers on screen can differ from reality, so treat the results as information only. The list built from the prices collected right now is on the combo payouts page.

Examples

3 outcomes · total stake 100 — Payout 97.40%

Difference -2.6 (-2.60%)

2 outcomes · total stake 100 — Payout 102.48%

Guaranteed profit +2.48 (+2.48%)

Combo payouts → · Betting odds glossary →

Odds and calculations are provided for information only.