Tools
Odds and probability calculators
Tools for the arithmetic behind market analysis: odds conversion, vig removal, expected value and parlay pricing. Everything computes in your browser — no input leaves the page.
Standing
VerifiedComputed from your input
Tools
Convert a price
What is this number claiming?
Negative for favourites (−145), positive for underdogs (+125). Runs locally; nothing is sent anywhere.
- Implied probability
- 59.2%
- Decimal
- 1.690
- Fractional
- 20/29
- Break-even win rate
- 59.2%
|odds| / (|odds| + 100)
1 + profit per unit staked
profit ÷ stake, reduced
equal to the implied probability
- ToolOdds converterConvert American odds to decimal odds and to the probability the price implies before the bookmaker's margin is removed.
- ToolNo-vig calculatorRemove the margin from a two-way market so both sides sum to 100%, giving the probability estimate implied by the price itself.
- ToolExpected value calculatorSize the expected value of a price given your own probability estimate, and see the fair price that estimate implies.
- ToolParlay calculatorCombine independent legs into a fair combined price and see how each leg's margin compounds across the ticket.