15 Bet Accumulator Calculator
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Reviewed by Calculator Editorial Team
This calculator helps you determine the potential payout of a 15-bet accumulator in sports betting. By entering the odds for each of your 15 selections, you can calculate the total potential return if all bets win.
What is a 15-Bet Accumulator?
A 15-bet accumulator is a sports betting strategy where you combine 15 individual bets into a single wager. If all 15 selections win, you receive the combined payout. However, if any single bet loses, the entire accumulator is void.
Accumulators offer higher potential returns but come with increased risk. The more bets you include, the higher the potential payout but also the greater the chance of losing everything.
Important: Accumulators are not available in all betting markets. Check with your bookmaker to confirm they offer multi-leg accumulators.
How to Use This Calculator
- Enter the odds for each of your 15 selections in the calculator form.
- Select whether the odds are in decimal, fractional, or American format.
- Click "Calculate" to see your potential payout.
- Review the results and adjust your selections if needed.
The calculator will show you the total potential return if all bets win, as well as the implied probability of your accumulator winning.
Formula Explained
The calculator uses the following formula to determine the accumulator payout:
Total Payout = (Bet Amount × Odds1) × Odds2 × ... × Odds15
Where Odds1 through Odds15 are the decimal odds for each of your 15 selections.
The implied probability of your accumulator winning is calculated as:
Implied Probability = 1 / (Odds1 × Odds2 × ... × Odds15)
Worked Example
Let's say you have a 15-bet accumulator with the following decimal odds for each selection:
- 1.50, 2.00, 2.50, 3.00, 3.50
- 4.00, 4.50, 5.00, 5.50, 6.00
- 6.50, 7.00, 7.50, 8.00, 8.50
Using the calculator, you would enter these odds and select "Decimal" as the odds format. The calculator would then show:
- Total Payout: £1,000,000.00 (if you bet £100)
- Implied Probability: 0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000