Betting maths on the numbers you enter. Amounts are in pounds (£).
Everything is worked out in your browser. Nothing you type is sent or saved.
Enter the odds for every outcome of one market. The implied probabilities add up to the "book"; above 100% is the bookmaker's overround. Hold is the share of all money staked the bookmaker keeps if stakes are balanced: 1 − 1 ÷ book. A negative hold means the prices form an arb.
Results are a record of maths on the numbers you enter, not advice.
