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Calculators
Betting calculators
Every calculator runs on the same tested maths. Fractional, decimal and American odds all work, with each way, Rule 4 and non runners built in.
Most used
Bet calculator
Pick your bet type, enter your odds and stake, then mark each selection as won, placed, lost or void.
Each way calculator
An each way bet is two bets of the same stake: one to win and one to place.
Odds converter
Type odds in any format.
Singles, doubles and accas
Double calculator
A double is one bet on two selections.
Treble calculator
A treble is one bet on three selections.
Acca calculator
An accumulator, or acca, is one bet on four or more selections.
Full cover bets with singles
Patent calculator
A Patent bet is 7 bets on 3 selections: 3 singles, 3 doubles and 1 treble.
Lucky 15 calculator
A Lucky 15 is 15 bets on 4 selections: 4 singles, 6 doubles, 4 trebles and 1 fourfold.
Lucky 31 calculator
A Lucky 31 is 31 bets on 5 selections: 5 singles, 10 doubles, 10 trebles, 5 fourfolds and 1 fivefold.
Lucky 63 calculator
A Lucky 63 is 63 bets on 6 selections: 6 singles, 15 doubles, 20 trebles, 15 fourfolds, 6 fivefolds and 1 sixfold.
Full cover bets without singles
Trixie calculator
A Trixie bet is 4 bets on 3 selections: 3 doubles and 1 treble.
Yankee calculator
A Yankee bet is 11 bets on 4 selections: 6 doubles, 4 trebles and 1 fourfold.
Super Yankee calculator
A Super Yankee, also called a Canadian, is 26 bets on 5 selections: 10 doubles, 10 trebles, 5 fourfolds and 1 fivefold.
Heinz calculator
A Heinz is 57 bets on 6 selections: 15 doubles, 20 trebles, 15 fourfolds, 6 fivefolds and 1 sixfold.
Super Heinz calculator
A Super Heinz is 120 bets on 7 selections: 21 doubles, 35 trebles, 35 fourfolds, 21 fivefolds, 7 sixfolds and 1 sevenfold.
Goliath calculator
A Goliath is 247 bets on 8 selections: every double, treble and bigger multiple up to an eightfold.
Free bets and matched betting
Free bet calculator
A free bet usually pays your winnings but not the stake.
Matched betting calculator
A matched bet backs a selection at a bookmaker and lays the same selection at a betting exchange.
Lay bet calculator
A lay bet is a bet that something won't happen.
Staking and strategy
Dutching calculator
Dutching means backing several selections in the same race or match, with the stake split so any winner pays the same.
Arbitrage calculator
An arb is when the best prices for every outcome, usually at different bookmakers, add up to less than 100%.
Kelly criterion calculator
The Kelly criterion is a formula for how much of your bankroll to stake when you think a price is too big.