Lucky 15 Calculator
Total outlay = stake per bet x 15
How To Use This Calculator
The Lucky 15 calculator works out returns for all 15 bets from your 4 selections at any unit stake, from a 20p line upwards. Mark winners and losers, set your stake per bet, and toggle the 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 covers 4 selections with 15 separate bets: 4 singles, 6 doubles, 4 trebles, and 1 four-fold accumulator. One winner is enough for a return because every selection carries its own single, and each extra winner pays through every double, treble, and accumulator it appears in.
It is a horse racing bet at heart. Most Lucky 15s go on UK and Irish racing at small unit stakes, often 20p or 50p a line and frequently each-way, with bookmakers like Betfred competing on bonus concessions. Lucky 31 (5 picks) and Lucky 63 (6 picks) extend the same structure with more 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.
How to Work Out a Lucky 15
To work out a Lucky 15 by hand, list the 15 bets, settle every line made up only of winners by multiplying the decimal odds and your stake, then add the winning lines together. Any line containing a loser returns nothing.
£1 per line (£15 total). A wins at 2.00 (evens), B wins at 2.50 (6/4), C wins at 3.00 (2/1), D loses.
Singles: A £2.00 + B £2.50 + C £3.00 = £7.50 (the D single loses)
Doubles: AB £5.00 + AC £6.00 + BC £7.50 = £18.50 (the 3 doubles with D lose)
Treble: ABC = 2.00 x 2.50 x 3.00 = £15.00 (the 3 trebles with D lose)
Four-fold: loses, it needed all four to win
Total return: £7.50 + £18.50 + £15.00 = £41.00
Profit: £26.00 on £15 staked
Seven of the 15 lines paid (3 singles, 3 doubles, 1 treble) and eight lost. That is the whole method at any odds: settle each all-winner line, ignore the rest. The calculator above runs the same arithmetic instantly, including mixed odds and bonuses.
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.
20p and 50p Lucky 15 Examples
Small stakes are the norm for this bet. A 20p Lucky 15 costs £3.00 in total and a 50p Lucky 15 costs £7.50, because the unit stake is paid on each of the 15 lines. The returns below assume every selection is priced at decimal odds of 2.00 (evens).
| Winners | 20p Lucky 15 Return | 50p Lucky 15 Return |
|---|---|---|
| 1 of 4 | £0.40 | £1.00 |
| 2 of 4 | £1.60 | £4.00 |
| 3 of 4 | £5.20 | £13.00 |
| 4 of 4 | £16.00 | £40.00 |
At evens you need 3 winners to turn a profit: £5.20 back against £3.00 staked at 20p, or £13.00 against £7.50 at 50p. Longer odds pull the break-even point down. The sample table above shows the same scenarios in units, so you can scale to any stake.
Lucky 15 Bonuses at Betfred and Other Bookmakers
The classic Lucky 15 concession: if exactly one of your 4 selections wins, the single is settled at double the odds. Betfred is the bookmaker most associated with this offer, and several other UK books have run their own versions, occasionally at treble odds. Model it with the double-odds toggle in the calculator.
The other common variant adds a percentage on top of the total return when all 4 selections win. 10 percent is typical and some books have offered more. The calculator's all-winners toggle defaults to 10 percent.
These offers change often and carry conditions: many apply to horse racing and greyhounds only, exclude non-runners, or set minimum odds per selection. Never assume a bonus applies. Check the current terms on your bookmaker's site before you place the bet.
Each-Way Lucky 15
An each-way Lucky 15 doubles the bet to 30 lines: 15 on the win part and 15 on the place part. A £1 each-way Lucky 15 costs £30 in total, and a 20p each-way version costs £6.
Place lines settle at a fraction of the win odds, commonly 1/4 or 1/5 depending on the race type and field size. A horse that places at 4.00 (3/1) with a 1/4 place fraction returns the place line at 1.75 (3/4), so a £1 place line pays £1.75 even when the win line loses.
This is why the Lucky 15 suits racing so well: with four each-way picks, a couple of placed horses can pull back most of a losing card. There is no place market in football or tennis, so on those sports the bet stays win-only.
Common Mistakes to Avoid
A £5 Lucky 15 costs £75, not £5, and £150 each-way. Size your unit from the 15x multiplier, not the per-line figure.
Bookmaker bonuses regularly exclude certain sports, non-runners, or dead-heat finishes, and the headline percentages change. Check the current terms instead of assuming the toggle matches your book.
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 of the four legs should be a value bet on its own merits before you multiply your exposure by 15.
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.