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Acca Calculator

Our free acca calculator works out the combined odds, return and profit on any accumulator. Add your selections, mark any void legs, and include an acca boost or a free bet stake if you have one.

Combined odds–
Total return–
Profit–

Enter odds as fractions (5/2), decimals (3.5), American (+150) or “evens”. Mark a selection as void if the event was cancelled or a non-runner: it counts as odds of 1.0. The boost applies to winnings only, as most UK acca boosts do; check your bookmaker’s maximum boost.

Video: how to use the acca calculator (1 minute 40 seconds, with voiceover).

How to use the acca calculator

  1. Enter your stake. If you're using a free bet, choose "Free bet (stake not returned)" so the stake isn't counted in the return.
  2. Add each selection's odds. Type them as shown on your bet slip. Fractions, decimals, American odds and "evens" all work.
  3. Set each leg's result. Mark legs as won, void or lost. A void leg (a postponed match or a non-runner) is treated as odds of 1.0, so the acca continues at shorter odds.
  4. Add an acca boost. Enter the boost percentage if your bookmaker offers one. It applies to the winnings, not the stake.

How acca odds are worked out

The combined odds of an accumulator are every selection's decimal odds multiplied together. A treble at 2.5, 3.0 and 2.0 has combined odds of 15.0, so a £5 bet returns £75. That's why accas pay so well, and also why they lose so often: every leg has to win.

Many bookmakers offer acca insurance, which refunds your stake as a free bet if one leg lets you down. Read acca insurance explained to see how it works.

What happens if one leg of my acca is void?

The void leg is removed and your acca is settled as if it had one fewer selection, at the combined odds of the remaining legs.


Does an acca boost apply to my stake?

Usually not. Most UK acca boosts increase the winnings only. Check your bookmaker's terms for the maximum boost.


Can I use this for a bet builder?

Not reliably. Bookmakers adjust bet builder prices because the selections are linked, so the price on your bet slip will usually be lower than the legs multiplied together. Use the price your bookmaker quotes.

18+ only. The calculator is for guidance; your bookmaker's settlement rules always apply.