Betting calculators
Free tools to work out returns before you bet. All calculations run in your browser and nothing you enter is sent to a server.
Odds Calculator
Work out the total return and profit on a single bet.
How it works
Decimal odds include your stake, so total return is stake multiplied by odds. Profit is the return minus the stake. Fractional and American odds are converted to decimals first, so the same formula applies to all three formats.
What's the difference between decimal, fractional and American odds?
Decimal odds (e.g. 3.50) show your total return per £1 staked, including the stake back. Fractional odds (e.g. 5/2) show profit relative to stake: 5/2 means £5 profit for every £2 staked. American odds (e.g. +250 or -150) show profit per £100 staked for underdogs (positive) or the stake needed to win £100 for favourites (negative).
Does this include tax on winnings?
No. This shows the bookmaker's payout only. Betting winnings are not currently taxed in the hands of the customer in the UK, but rules can change and this is not tax advice.
Each-Way Calculator
An each-way bet is two equal stakes, one on the win and one on the place. Enter the stake per part, the odds and the place terms displayed by the shop.
How it works
Your total outlay is double your stated stake, since you're placing two separate bets of that size. The win part only pays out if the selection wins outright; the place part pays out at a fraction of the win odds (set by the place terms) if it merely places.
What does "1/5 odds, 4 places" mean?
It's the place terms a bookmaker offers for a specific race. Here, the place part of your bet pays out at 1/5 of the win odds if your selection finishes in the first 4. Terms vary by race size and type (handicap vs non-handicap), so always check the terms shown at the time of your bet.
Why is my outlay double my stake?
Because an each-way bet is really two bets in one slip, a win bet and a place bet, each at the stake you entered. A "£5 each-way" bet costs £10 in total.
Accumulator Calculator
Combine several selections into one bet. All must win for the accumulator to pay. Add each selection's odds; the calculator multiplies them together.
How it works
The combined odds are every selection's decimal odds multiplied together. Because every leg has to win, accumulators offer bigger potential returns than single bets but are much less likely to pay out overall.
What happens if one selection is void or postponed?
Most UK bookmakers treat a void or postponed leg as a non-runner and settle the rest of the accumulator as if that leg had odds of 1.0 (it is removed from the calculation), but rules vary by bookmaker, so always check their specific terms.
Implied Probability
Convert a bookmaker's odds into the chance of that outcome they imply.
How it works
Implied probability is simply 1 ÷ decimal odds, shown as a percentage. It's the chance of that outcome the odds imply, not necessarily the bookmaker's true assessment, since their odds also build in a margin (the "overround").
Why do the probabilities for all outcomes add up to more than 100%?
That extra percentage is the bookmaker's built-in margin (overround). It is how they price in their profit across all outcomes of an event, not a reflection of the true odds.