Enter your stake, choose your odds format (decimal, fractional, or American), and add the odds for each selection in your accumulator. The Accumulator Bet Calculator returns your total accumulator odds, potential return, and profit — all in one shot. Supports 2 to 8 selections (double through eightfold), with a visual breakdown of how your stake compounds across legs.
Potential Return
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Total Accumulator Odds
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Profit
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Total Stake
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An accumulator (or 'acca') combines multiple individual selections into a single wager. All selections must win for the bet to pay out. The odds for each selection are multiplied together, meaning potential returns grow dramatically — but so does the risk.
Convert each selection's odds to decimal format, then multiply them all together. For example, three selections at 2.0, 2.5, and 3.0 decimal give combined odds of 15.0. Multiply by your stake to get the total return, then subtract the stake to find profit.
If any single selection in your accumulator loses, the entire bet is lost. There are no partial payouts on a standard accumulator. Some bookmakers offer 'Acca Insurance' which refunds your stake (often as a free bet) if exactly one selection loses.
They are essentially the same thing — a multi-selection bet where all legs must win. 'Accumulator' is the term commonly used in the UK, while 'parlay' is the equivalent term used in the US and Canada. The calculation method is identical.
Select 'Fractional' as your odds format, then enter odds in the standard fractional format, for example '5/2' or '7/4'. The calculator will automatically convert these to decimal odds for the calculation. Whole number fractions like '3/1' are also supported.
Select 'American' as your odds format and enter odds as either a positive number (e.g. +150 for an underdog) or a negative number (e.g. -110 for a favourite). Positive odds indicate profit on a £100 stake; negative odds indicate the stake needed to win £100.
More selections mean higher potential returns but a much lower probability of winning. Most recreational bettors stick to 4–6 selections for a balance of return and feasibility. Adding more legs makes the bet progressively harder to win, as all must come through.
Acca Insurance is a promotional offer from bookmakers where, if exactly one selection in your accumulator loses, you receive your stake back (usually as a free bet or bonus). Typically available on accumulators of 5 or more selections. Terms and conditions vary by bookmaker.