Simple Accumulator Calculator For 2026

What The Accumulator Calculator Works Out

• Combined odds: the decimal odds of every leg multiplied together, because the winnings from each selection roll onto the next. Four selections at evens (2.0) combine to 16.0, and adding a fifth at evens doubles it again to 32.0. Fractions such as 6/4 are converted automatically.
• Total return: stake multiplied by the combined odds. Every single leg must win; one loser and the whole bet is lost however the others fared.
• Profit: total return minus the stake.
• Acca bonus (advanced): many bookmakers add 5% to 70% to the winnings of a successful accumulator, rising with the number of legs. The bonus is paid on profit, not on the stake.
• Non-runner or void leg (advanced): a withdrawn selection is settled at odds of 1.0, so the bet continues as a smaller accumulator. Enter the selection number to see the reduced return.
• Bookmaker margin per leg (advanced): the margin built into each price compounds across the legs: four legs at 5% each is about a 21.6% combined take, which is why accumulators are poor value relative to singles. The card shows the compounded margin and what a fair return would have been.
• Exchange commission (advanced): exchanges charge 2% to 5% of net winnings instead of a margin in the price. Enter 0 for an ordinary bookmaker.
• Acca insurance (advanced): some firms refund the stake, usually as a free bet, if exactly one leg lets you down. A free bet is worth roughly 70% of its face value because the stake is not returned when it wins.
• Maximum payout (advanced): bookmakers cap winnings, typically GBP 100,000 to GBP 1 million for mainstream football and racing but far less for minor markets. The card shows any winnings lost to the cap.
• Implied chance of landing (advanced): the product of 1 divided by each leg's odds. Four evens shots imply 6.25%, or about 1 in 16, before the bookmaker's margin makes the real chance smaller still.
• Leg-by-leg table (advanced): each leg's implied chance plus the running combined odds and return, so you can see how the multiplication builds.
• Please gamble responsibly: stake only what you can afford to lose. GamCare offer free confidential support on 0808 8020 133. 18+.