Lucky 15 Calculator

This calculator works out the returns on a Lucky 15: fifteen bets across four moneyline picks, singles included, so you can see the outlay, the settled return, and how a single winner still pays before any sportsbook bonus lands.

What Is a Lucky 15?

A Lucky 15 is a full cover bet on four picks that includes every possible singles, so it pays out something even when only one of your four picks comes in. In full, it is made up of four singles, six doubles, four trebles and one four-fold, which adds up to fifteen separate bets from just four selections. Every combination of your four picks is covered by one of those fifteen lines, so there is no combination of results, short of a total wipeout, that returns nothing at all.

What sets the Lucky 15 apart from a plain four-fold parlay, or even from its close relative the Yankee, is the inclusion of the four singles. Those singles are what let a single correct pick produce a return, rather than requiring at least two picks to land before anything comes back. That is also why the Lucky 15 is the bet most associated with sportsbook bonuses: a single winner among four picks is a common enough outcome that many books have built promotional terms specifically around it, on top of a percentage uplift when every leg lands. That bonus structure is a large part of why bettors choose a Lucky 15 over a straightforward four-fold, even though the extra lines mean a larger outlay for the same four picks.

How a Lucky 15 Is Calculated

The bet count itself is simple addition: 4 singles + 6 doubles + 4 trebles + 1 four-fold = 15 bets in total, covering every possible combination of your four picks. Your total outlay is then 15 x your unit stake, since every one of those fifteen lines carries its own stake.

Settling the bet means working out the return on each of those fifteen lines individually, using the price attached to each pick, and adding them together. American odds convert to a decimal price before that math happens. For a favorite like -143, the decimal price is 1.70: you divide 100 by the odds figure (ignoring the minus sign) and add 1. For picks quoted at even money or better, such as +100, +120 and +200, the decimal prices are 2.00, 2.20 and 3.00: you divide the American figure by 100 and add 1. Multiplying the relevant decimal prices together, and then by the stake on that line, gives the return for each of the fifteen bets. Sum all fifteen and you have the total return on the bet before any bonus.

Sportsbook bonuses, where a book offers them, are applied on top of that settled return rather than being part of the underlying math. They typically depend on how many of your four picks won, which is why this calculator separates the raw fifteen-line return from any bonus a book might add afterward.

What the Calculator Shows You

Once you enter your four prices, your unit stake and the result of each pick, the calculator shows you the full bet breakdown, singles, doubles, trebles and the four-fold, so you can see exactly which of the fifteen lines are still live. It shows your total outlay across all fifteen bets, so you know the full cost of the ticket up front. It then shows the settled return based on however many picks actually won, along with the profit once that outlay is subtracted. Because the Lucky 15 pays on partial results, the calculator reflects a return even when not every pick comes in, distinct from the return you would see if all four had won. None of these figures include any sportsbook bonus, which sits outside the raw settlement math.

Worked Example

Take a Lucky 15 on four moneyline picks at a $0.50 unit stake: 49ers to beat Seahawks at -143, Nuggets to beat Jazz at +100, Astros to beat Mariners at +120, and Avalanche to beat Coyotes at +200. In decimal terms those prices are 1.70, 2.00, 2.20 and 3.00. With four picks, the bet breaks down into 4 singles, 6 doubles, 4 trebles and 1 four-fold, for 15 bets in total. At $0.50 a line, the total outlay is $7.50.

If all four picks win, the fifteen lines together return $51.34. Subtracting the $7.50 outlay leaves a profit of $43.84. That return comes from every one of the fifteen combinations landing at once, from the four singles right through to the single four-fold covering all four picks.

Now suppose the Avalanche lose while the 49ers, Nuggets and Astros all win. The four-fold is dead, along with any double or treble that included the Avalanche leg. What survives is the three singles on the winning picks, the three doubles between them, and the one treble combining all three, still a meaningful slice of the fifteen lines. That partial result returns $12.46, for a profit of $4.96 once the $7.50 outlay is accounted for.

The gap between $43.84 and $4.96 shows exactly what the singles buy you: even a single upset among four picks still leaves a live return, just a far smaller one than a clean sweep, and well short of what a straight four-fold parlay would have paid on the same three winners alone.

What the 15 Bets in a Lucky 15 Actually Are

The fifteen lines break down into four bet types, and it helps to see the split laid out rather than just added up. Singles and doubles make up the bulk of the ticket, while only one bet, the four-fold, needs all four picks to land.

Total Outlay for a Lucky 15 at Different Unit Stakes

Because a Lucky 15 always runs to fifteen lines regardless of your stake size, the outlay scales in a straight line as you move the unit stake up or down. The table below shows that outlay at four common stake sizes, all still covering the same fifteen bets.

The Sportsbook Bonus Layered on a Lucky 15

The feature that most defines the Lucky 15 is not the fifteen lines themselves but the bonus structure many sportsbooks build around them. It is common for a book to offer a consolation bonus when just one of your four picks wins, softening what would otherwise be a small partial return, and then a further percentage uplift on top of the settled return if all four picks land. Those terms are set by each individual sportsbook rather than being a fixed part of how a Lucky 15 settles, so they vary from one book to the next and can change over time.

That variation matters because this calculator, like the underlying bet itself, works out only the headline return from the fifteen lines as priced. Any bonus a sportsbook adds sits on top of that figure, applied after settlement rather than folded into it. Treat the number this calculator produces as the floor, not the ceiling, on what a winning Lucky 15 ticket might actually pay. Before relying on a bonus as part of your expected return, check the specific terms at the book you are using: whether the one-winner consolation is a fixed amount or a multiple of stake, and whether the four-winner uplift applies to the total return or only part of it. Those terms sit outside the raw settlement math, so confirm them each time rather than assuming an old promotion still applies.

When a Lucky 15 Makes Sense

A Lucky 15 suits a bettor who likes to back four picks but wants a return even if only one comes in, rather than needing at least two to land the way a Yankee requires. That safety net comes at a real cost: fifteen times the unit stake against four picks is a larger outlay than the eleven lines of a Yankee or the single line of a straight four-fold parlay, so it only makes sense if that extra cost is justified by the extra coverage, or by a sportsbook bonus that rewards the format specifically.

It tends to make the most sense when a bettor is already inclined to place four separate bets and wants them tied together for a shot at a larger four-fold payout, without giving up the chance of a return if the four-fold misses. It makes less sense as a way to chase a bonus alone, since the underlying math still has to work: fifteen lines of stake need to be justified by the prices on offer, independent of whatever a book adds afterward. Bettors managing a bankroll should treat the total outlay, not the unit stake, as the real commitment, and compare that outlay against what a Yankee or a set of straight bets on the same four picks would cost. Where a bettor only wants exposure to combinations of two or more picks, without paying for the four singles, a Yankee is the more efficient choice on the same four selections.

Common Mistakes

Do not assume the bonus applies automatically, since the terms differ from one sportsbook to the next. Do not underestimate the outlay: it is fifteen times the unit stake, not four times. Do not expect a single winning pick to produce a profit; it typically returns only a partial amount against the full outlay. Do not compare a Lucky 15’s return directly with a Yankee’s without accounting for the Lucky 15’s larger outlay, since the extra four lines change what counts as a genuine profit.

Lucky 15 vs Yankee (and the Rest of the Lucky Family)

The Lucky 15 sits inside a family of full cover bets that scale with the number of selections. Against its nearest relative, the Yankee, the difference is exactly the four singles that push eleven lines to fifteen.