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Accumulator Bet Calculator

Your acca’s odds and payout.

How it is calculated

Enter one stake and the decimal odds of two to four legs in odds1 to odds4. The tool multiplies the odds: total odds = odds1 × odds2 × …. The payout is stake × total odds and the profit is payout − stake, so the payout includes your stake back. Blank legs are skipped, so three legs need only three fields. Each odds value must be above 1.00; an odds of 1.00 or less returns no result, and so does fewer than two legs. Amounts are shown in dollars, total odds to 2 decimals. The calculator assumes every leg wins, as the bet only pays then. It does not model rule variations such as dead heats or void legs.

Worked example

A 10 stake on three legs at decimal odds of 1.8, 2.1 and 1.5. Multiply: 1.8 × 2.1 = 3.78, then 3.78 × 1.5 = 5.67, so the total odds are 5.67. Payout: 10 × 5.67 = $56.70. Profit: 56.70 − 10 = $46.70. If any one of the three legs loses, the whole stake of 10 is lost, which is the price of the higher combined odds.

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Common mistakes

  • Typing fractional or American odds. The fields need decimal odds above 1; 5/4 must be entered as 2.25.
  • Treating the payout as profit. The payout of 56.70 includes the 10 stake, so the profit is 46.70.
  • Adding the odds instead of multiplying them. 1.8 + 2.1 + 1.5 gives 5.4, not 5.67, and the gap grows with each leg.
  • Ignoring the risk. Every leg must win, so the chance of collecting is the product of each leg's chance and falls with every leg added; the odds shown say nothing about that probability.

About this calculator

An accumulator (also called a parlay in the US) combines multiple individual bets — called "legs" — into a single wager that only pays out if every leg wins. The combined odds are found by multiplying the decimal odds of each leg together, which is why accumulators offer much larger potential payouts than betting on each outcome separately: four legs at odds of 2.00 each combine to 2.00⁴ = 16.00, turning a $10 stake into a possible $160 instead of four separate $20 payouts.

That multiplicative structure cuts both ways — since every leg must win, the true probability of collecting drops sharply with each added leg (even at even money per leg, a four-leg acca only wins about 6.25% of the time), which is exactly why bookmakers offer such attractive combined odds. Bettors use accumulator calculators to quickly see the total odds and potential return of a multi-leg bet slip before placing it, factoring in each leg's individual price.

This calculator multiplies the odds of 2 to 4 legs together and shows your total odds and payout for a given stake.

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