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Calculators
Every calculator here runs entirely in your browser. Nothing you type is sent anywhere or saved. They're the same formulas described in the guides, made interactive so you can put your own numbers in.
20 tools
What you'll take away
- Convert between odds formats and read the probability behind a price
- Strip margin out of a book to see what the market really thinks
- Turn expected goals into scorelines, totals and both-teams-to-score
- Size a stake, check an accumulator's real cost, and grade your closing line
Calculators
Price a market
Every price is a probability with a fee on top. These five separate the two.
Odds ConverterWhat is this price in every other notation?Free
Fair OddsWhat does the market think once the bookmaker's fee comes out?Free
Double Chance & DNBIs the quoted price on 1X consistent with the 1X2 book?Free
Odds MovementA price moved. How much did the probability actually change?Free
PoissonTwo expected-goals numbers in, a full grid of scorelines out.Free
Size the bet
Stake size decides whether a real edge survives long enough to pay.
Expected ValueRepeat this bet a thousand times. Do you end up ahead?Free
Kelly CriterionWhat stake does your edge justify, and why is full Kelly too much?Free
Break-EvenAt this price, how often must you be right just to stand still?Free
Risk of RuinHow likely is this staking plan to end your bankroll?Free
Bankroll SimulatorWhat does a bad run look like before it happens to you?Free
MartingaleDoubling after a loss feels safe. Here is where it stops being safe.Free
Work the book
More than one selection, or the other side of one.
AccumulatorFive legs, five margins. What is the acca really costing you?Free
ArbitrageDo two books disagree enough for the result not to matter?Free
DutchingBack several outcomes and return the same whichever lands.Free
HedgeLock the result in, and price what the cash-out button is worth.Free
Lay BettingWhat is your liability before you place the lay?Free
Asian HandicapWhere do half-wins come from, and what does a quarter line commit you to?Free
Grade your decisions
A result tells you almost nothing about a single bet. These three tell you more.