Acca Calculator
How To Use This Calculator
Enter the odds for each leg of your accumulator and set your stake. The calculator multiplies the legs together and shows the combined odds, total return, and profit. Mark legs as void or lost to see how the acca settles, and switch on each way to price the place part.
Enter 2 to 20 legs in fractional, decimal, or American odds. Use Add Leg for bigger accas.
Enter your stake, and switch on each way with the matching place fraction if your acca is each way.
Check the combined odds, total return, and profit. Mark legs win, lose, or void to settle the bet.
What Is an Acca?
An accumulator, or acca, is one bet built from several selections. The odds of every leg are multiplied together, so short prices stack into a big combined price fast. The catch is the same multiplication: every leg has to win, and a single loser sinks the whole bet.
Accas are most popular in UK football and horse racing. A typical Saturday acca strings four or five favourites into one bet at double-figure combined odds.
How to Work Out Accumulator Returns
You place a $10 acca on four legs at evens (2.00), 4/5 (1.80), 6/4 (2.50), and 3/5 (1.60), and all four win.
Each Way Accas
An each way acca is two accumulators in one: a win acca at full odds and a place acca at a fraction of each leg's odds. The stake is doubled to cover both parts. If every selection wins you collect both parts; if they all at least place, the place part still pays.
The place part rebuilds each leg at reduced odds. At 1/4 terms, a leg at 4.00 becomes 1.75: keep the stake unit, take a quarter of the 3.00 profit. The calculator multiplies these reduced odds together the same way as the win part.
Place terms depend on the bookmaker and the market. Racing markets commonly pay 1/4 or 1/5 of the win odds over a set number of places, and the number of places changes with field size. Check the terms on your bet slip and pick the matching fraction.
Void Legs and Non-Runners
A leg goes void when the selection never gets a run: a non-runner in racing, an abandoned match, or a market the bookmaker cancels. Bookmakers generally settle void legs at odds of 1.00 rather than treating them as losers, but rules differ, so check your book's terms.
At odds of 1.00 the leg drops out of the multiplication, so a five-fold with one void leg pays as a four-fold. Mark a leg void in the calculator and the combined odds and returns update to the smaller acca.
Acca vs Parlay
An acca and a parlay are the same bet under two names. Accumulator, or acca, is the UK and Irish term; parlay is the North American one. Both multiply the odds of several legs into one bet where every leg must win.
This page speaks fractional odds and each way terms. If you think in American odds, the parlay calculator does the same combined-odds math with a US framing.
Common Mistakes to Avoid
Every leg multiplies the payout and the chance that one loser wipes the bet. Long accas look like lottery tickets because they mostly settle like them.
The bookmaker's margin sits inside every leg's price, and multiplying legs multiplies the margin too. The longer the acca, the further the combined odds drift below a fair price.
Place fractions and places paid change between markets and bookmakers. Settling at 1/4 when your slip says 1/5 gives the wrong number; copy the terms from the actual bet.
An acca of overpriced legs multiplies your edge; an acca of short, poorly priced legs multiplies the bookmaker's edge instead. Check each leg's price on its own merits first.
Frequently Asked Questions
What is an acca in betting?
An acca, short for accumulator, is one bet that combines several selections. The odds multiply together and every leg must win for the bet to pay out. A four-leg acca is a four-fold, five legs a five-fold, and so on.
How do I work out accumulator returns?
Convert each leg to decimal odds, multiply them together, then multiply by your stake. A $10 acca on legs at 2.00, 1.80, 2.50, and 1.60 returns 10 x 14.40 = $144, for a $134 profit.
How does an each way accumulator work?
It is two accas in one: a win acca at full odds and a place acca at a fraction of each leg's odds, commonly 1/4 or 1/5. The stake doubles to cover both parts, and the place part pays as long as every selection at least places.
What happens to my acca if a horse is a non-runner?
Bookmakers generally settle a non-runner as a void leg at odds of 1.00, so a five-fold becomes a four-fold on the remaining legs. Rules vary between books and markets, so check the terms where you placed the bet.
Is an acca the same as a parlay?
Yes. Accumulator is the UK term and parlay the US term for the same bet: several selections combined into one, odds multiplied, all legs must win.
How many legs should an acca have?
This calculator handles 2 to 20 legs. There is no magic number, but every extra leg raises the chance that a single loser wipes the bet and stacks another slice of bookmaker margin into the price.
Can I enter fractional odds?
Yes. The calculator takes fractional odds like 5/2 by default and also accepts decimal and American formats. The combined odds are shown in whichever format you pick.
How do I find legs worth putting in an acca?
The math only multiplies what you feed it, so each leg needs to be a good price on its own. Bet Hero's value bet scanner compares bookmaker prices against sharp market odds in real time and flags selections priced above their true chance.
Price the legs, not the dream
A big combined price is not the same as a good bet. Before placing an acca, check each leg against the sharp market: if the individual prices are short of fair value, multiplying them compounds the damage. Bet Hero flags overpriced selections across more than 400 bookmakers in real time, so you can build accas from legs that stand on their own.