Interactive toolkit
Choose the calculation you need
Every tool is free, works without an account and includes a plain-English guide to the result.
12Returns
Complete bet calculator
Calculate singles, accumulators and eight system-bet structures with settled results.
Open tool→↔Market analysisNew
Odds converter
Convert fractional, decimal and American odds, then see implied probability and return.
Open tool→%Market analysisNew
Bookmaker overround calculator
Measure a market's book percentage and overround, then remove margin proportionally.
Open tool→EVMarket analysisNew
Expected value calculator
Compare a decimal price with your probability estimate and see expected value per stake.
Open tool→Y15ReturnsNew
Yankee vs Lucky 15
Compare 11 versus 15 lines, each-way cost and settled returns from the same four selections.
Open tool→VARStrategyNew
Betting variance simulator
Explore possible ending balances, losing runs and drawdown from clearly stated assumptions.
Open tool→AHReturnsNew
Asian handicap calculator
Settle whole, half and quarter lines from the selected team's final score.
Open tool→57ReturnsNew
Heinz bet calculator
Settle all 57 lines, including each-way terms, losses and void selections.
Open tool→BRStrategyNew
Bankroll and unit size
Compare flat, percentage and capped fractional Kelly stake calculations.
Open tool→=StrategyNew
Dutching calculator
Split one total stake across mutually exclusive outcomes to target an equal gross return.
Open tool→1-2-3RacingNew
Forecast and tricast
Count straight, reverse and combination lines, total outlay and declared-dividend returns.
Open tool→EWRacing
Each-way bet calculator
Check both bet parts, the place fraction and the overall profit or loss.
Open tool→R4Racing
Rule 4 calculator
Apply a stated non-runner deduction to profit while keeping the returned stake separate.
Open tool→½Racing
Dead-heat calculator
Check a win or place return when tied selections share qualifying positions.
Open tool→×Returns
Each-way accumulator
Settle the separate win and place multiples, including placed and void legs.
Open tool→£Strategy
Cash-out value
Compare an offer with a probability-weighted benchmark based on your estimate.
Open tool→ABStrategy
Accumulator vs bet builder
Compare fair odds and expected value while accounting for selection correlation.
Open tool→