Lucky 15 Calculator
Total outlay = stake per bet x 15
How To Use This Calculator
The Lucky 15 calculator computes returns for the full 15-bet multiple from 4 selections. Mark winners and losers, set your unit stake, and toggle optional UK bookmaker bonuses.
The calculator multiplies your unit stake by 15 for the total outlay.
Enter odds for each pick and toggle whether it won or lost.
See returns split by singles, doubles, trebles, and the four-fold accumulator.
What Is a Lucky 15?
A Lucky 15 is a UK multiple bet built from 4 selections. It combines every possible single, double, treble, and four-fold accumulator into 15 separate bets. You only need one selection to win to get a return, but the more winners you have, the bigger the payout from compounding combinations.
The bet originated in UK horse racing and remains popular at most British and Irish bookmakers. It is the smallest member of the Lucky family. Lucky 31 (5 picks) and Lucky 63 (6 picks) extend the same structure with additional selections.
- 4 singles
- 6 doubles
- 4 trebles
- 1 four-fold accumulator
- 15 total bets per Lucky 15
How a Lucky 15 Pays Out
Each of the 15 component bets settles independently. Returns from winning combinations are added together; losing combinations contribute zero.
Stake: 1 unit per bet. 4 selections, all winners at decimal odds 2.00.
Singles: 4 x 2.00 = 8 units
Doubles: 6 x (2.00 x 2.00) = 24 units
Trebles: 4 x (2.00 x 2.00 x 2.00) = 32 units
Four-fold: 1 x (2.00 x 2.00 x 2.00 x 2.00) = 16 units
Total return: 80 units (stake 15)
Profit: 65 units (4.33x the total outlay)
If only one selection wins, you only collect on that single bet (and any bookmaker bonus). If two win, you collect on 2 singles and the 1 double they share. The combinatorial structure is what gives Lucky 15s their characteristic payout curve.
Sample Lucky 15 Returns
All scenarios below assume 1 unit stake per bet (15 unit total outlay) with all selections at the same decimal odds.
| Winners | Odds Each | Return | Profit |
|---|---|---|---|
| 1 of 4 | 2.00 | 2 units | -13 units |
| 2 of 4 | 2.00 | 8 units | -7 units |
| 3 of 4 | 2.00 | 26 units | +11 units |
| 4 of 4 | 2.00 | 80 units | +65 units |
| 4 of 4 | 3.00 | 340 units | +325 units |
| 4 of 4 | 5.00 | 1560 units | +1545 units |
Returns exclude any bookmaker bonus. Add the relevant bonus toggle in the calculator above to model your specific bookmaker's terms.
UK Bookmaker Bonuses
If only one of your 4 selections wins, many UK bookmakers settle the single bet at double (or treble) the win odds. Our calculator includes a double-odds toggle. Check your bookmaker for the exact multiplier.
Some bookmakers add 10 to 20 percent on top of the total return when all 4 selections win. The default toggle uses 10 percent; treat published numbers as a guide and verify on your bookmaker's terms page.
Bonus rules vary widely. Bet365 doubles single-winner odds; William Hill historically did the same on horse racing only. Always confirm the exact terms before placing the bet, particularly for non-runners and dead-heat rules.
Common Mistakes to Avoid
A 5 unit Lucky 15 costs 75 units total, not 5. Always size your unit stake based on the 15x multiplier.
Bookmaker bonuses often exclude certain markets, non-runners, or dead-heat finishes. Read the small print before relying on bonus payouts in your calculation.
Small differences on each leg compound across 11 winning combinations. Use an odds comparison tool to lock in the best price on every selection.
The structure does not turn poor picks into +EV bets. Each leg should still be a value bet on its own merits.
Frequently Asked Questions
What is a Lucky 15 bet?
A Lucky 15 is a UK multiple bet of 15 bets from 4 selections: 4 singles, 6 doubles, 4 trebles, and 1 four-fold accumulator.
How many bets are in a Lucky 15?
Exactly 15: 4 singles + 6 doubles + 4 trebles + 1 four-fold. Your unit stake is multiplied by 15 to reach the total outlay.
How many winners do I need for a return?
Just one. A single winning selection pays out the matching single. Two winners add the connecting double; three add three doubles plus a treble; four winners trigger the full 15-bet payout.
What does a Lucky 15 pay if all four win at 2.00?
With a 1 unit stake per bet, the return is 80 units against a 15 unit outlay, or roughly 5.33x. Bonuses can push this higher.
What Lucky 15 bonuses are common?
Double odds on a single winner is the most common offer in UK and Irish racing. Some bookmakers add a 10 to 20 percent bonus when all four selections win. Terms vary by bookmaker and market.
What is the difference between a Lucky 15 and a Yankee?
A Yankee is 11 bets (6 doubles + 4 trebles + 1 four-fold) without singles. The Lucky 15 adds the 4 singles, raising the cost but lowering the bar for a return.
What is the difference between a Lucky 15 and a Lucky 31?
Lucky 31 uses 5 selections (31 bets) and Lucky 63 uses 6 (63 bets). Both follow the same singles-through-N-fold structure.
Can I bet a Lucky 15 each-way?
Yes. Each-way Lucky 15s are 30 bets total (15 win + 15 place), so a 1 unit each-way stake costs 30 units. Place legs settle at the win odds reduced by the bookmaker's place fraction.
Can I bet a Lucky 15 on football or other sports?
Yes. Lucky 15s work on any sport with discrete outcomes. They are most popular on UK and Irish horse racing because of the each-way structure, but football match-winner Lucky 15s are common too.
Are Lucky 15s profitable long term?
Only when every selection has positive expected value. The bet structure compounds your edge if your picks are sharp; it compounds the bookmaker's margin if they are not.
What unit stake should I use?
Choose a unit you would comfortably risk 15 times. Most disciplined bettors keep the total Lucky 15 exposure under 1 to 2 percent of bankroll.
Pro Tip: Validate Each Leg as +EV First
A Lucky 15 only outperforms straight bets when each selection is a value bet. Use our EV Calculator to confirm every leg has positive expected value before staking 15x your unit on the full multiple.