Lucky 15 Calculator
Enter 4 selections, a stake per line, and mark which selections won. This calculator supports decimal (e.g. 3.50) and fractional odds (e.g. 5/2).
What is a Lucky 15 bet?
A Lucky 15 is a popular multiple bet made up of 4 selections. Those 4 picks automatically create 15 separate lines:
- 4 singles
- 6 doubles
- 4 trebles
- 1 fourfold accumulator
Because it includes singles, you can still get a return with just one winner. That makes Lucky 15 bets more forgiving than a straight accumulator, but your total stake is higher because you are placing 15 bets at once.
How this lucky fifteen betting calculator works
Step 1: Enter your stake per line
If you enter a stake of 1.00, your total outlay is 15.00 (because 15 lines). If your stake is 0.50, your total outlay is 7.50.
Step 2: Enter odds for all 4 selections
You can use decimal odds like 2.75 or fractional odds like 7/4. Fractional values are converted to decimal automatically for the calculations.
Step 3: Mark winning selections
Tick the checkboxes for winners. The calculator then counts which singles, doubles, trebles, and fourfold lines are successful and totals the return.
Step 4: Optional all-winners bonus
Some bookmakers add a bonus when all 4 selections win. This can vary by provider and promotion. Use the bonus field if your bookie offers it; otherwise leave it at 0%.
Return formula used
This page uses a straightforward approach:
- Line return = Stake per line × (product of decimal odds in that line)
- Total return = Sum of all winning line returns + optional bonus
- Net profit/loss = Total return − Total stake
Decimal returns include the stake in each winning line, which is the standard format for betting calculators.
Example scenario
Suppose your 4 odds are 2.50, 3.00, 4.00, and 5.00 with a 1.00 unit stake per line. If all 4 win, every line wins and the return can become very large because multiples compound odds across doubles, trebles, and the fourfold.
If only two selections win, you will still collect from the corresponding singles and one double. That is the core appeal of the Lucky 15 structure: partial success can still produce a payout.
Tips for using Lucky 15 bets
- Manage bankroll: Remember you are placing 15 bets, not one.
- Check bookmaker terms: Bonus rules and each-way Lucky 15 variants differ.
- Compare odds: Small odds improvements can have a big effect on multiples.
- Track expected vs actual returns: Use a calculator before placing the bet.
Frequently asked questions
Is this calculator for win-only Lucky 15 bets?
Yes. This tool calculates standard win-only Lucky 15 returns. Each-way Lucky 15s require place terms and place fractions, which are bookmaker and race dependent.
Can I enter fractional odds?
Yes. Formats like 5/2, 11/4, and 7/1 are supported.
What happens if all selections lose?
All 15 lines lose, so return is 0 and net result is your full stake outlay.