Accumulator Bet Calculator

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.