Treble Calculator

This treble calculator turns three American odds - like -150, +100 and +120 - into one combined price, showing your payout and profit in dollars once all three NFL, NBA or MLB picks land.

What Is a Treble?

A treble is a three-pick parlay: all three selections must win, and their odds multiply into one combined price. It is the step beyond the double, and the point where a small stake starts producing eye-catching returns - three modest favorites can combine into a price that pays several times your money. US sportsbooks call it a three-leg parlay, but the treble is the core unit inside Trixies, Patents and every larger system bet that stacks trebles together.

Because a treble needs all three picks to land, it carries more risk than a single or a double, but it also compounds the payout further. A modest favorite paired with two moderate underdogs can turn a small stake into a payout worth many times the original bet. A single loss anywhere in the three legs sinks the whole treble - there is no partial credit for two out of three.

Sportsbooks build the treble into standard parlay menus, letting you tie together moneylines, spreads or totals across three different games. The treble sits between the double and larger system bets, often the first bet where the payout starts to feel disproportionate to the stake - which is exactly where understanding how the odds combine becomes essential.

How a Treble Is Calculated

Every American odds figure first gets converted into a decimal price before the three legs are combined. A favorite, a minus number, converts by dividing 100 by the odds’ absolute value and adding 1. An underdog, a plus number, converts by dividing the odds by 100 and adding 1. The favorite -150 becomes 1.67 in decimal. The underdog +100 becomes 2.00 in decimal. The underdog +120 becomes 2.20 in decimal.

Once all three picks are in decimal form, multiply them together to get the combined odds for the treble. Multiplying 1.67, 2.00 and 2.20 gives a combined price of 7.33, which is then multiplied by the stake to produce the payout; the stake is subtracted from the payout to leave the profit. Because the legs multiply rather than add, the combined price grows fast - three modest prices can still produce a payout many times the original stake, well beyond what the individual prices suggest.

All three picks have to win for the treble to pay out in full. If one leg is graded a push, that leg drops out of the calculation, and the treble settles as a double on the remaining two picks instead of voiding the whole bet. A loss on any leg, by contrast, ends the treble - there is no partial payout for two winners and one loser.

What the Calculator Shows You

Enter the American odds for each of your three picks along with your stake in dollars, and the calculator returns four figures. Combined odds show the single decimal price created by multiplying all three legs together. Payout is what the treble returns in total if all three picks win, applying the combined odds to your stake. Profit strips the stake back out of that payout. The calculator also lets you mark each leg win, loss or push after the games are settled, so you can see the payout adjust - a push drops that leg and the treble is rescored as a double on the other two, while a loss on any leg zeroes out the payout for the whole bet.

Worked Example

Take a $10 treble on three moneyline picks: -150, +100 and +120. The first leg is the Chiefs moneyline at -150, which converts to decimal odds of 1.67. The second leg is the Braves moneyline at +100, which converts to decimal odds of 2.00. The third leg is the Celtics moneyline at +120, which converts to decimal odds of 2.20.

Multiplying the three decimal prices together - 1.67, 2.00 and 2.20 - gives combined odds of 7.33. Applying that combined price to the $10 stake produces a payout of $73.33. Subtracting the $10 stake from that payout leaves a profit of $63.33.

The implied probability of all three legs landing together is 13.6%, reflecting how steep the combined price is once three separate prices are multiplied into one. The three prices combine to 7.33, so a $10 treble returns $73.33 for a $63.33 profit - more than seven times the stake, but all three picks have to land.

That is the shape of every treble: three moderate prices stack into one number that looks disproportionate next to the stake, and the entire payout depends on the Chiefs, Braves and Celtics all winning their games. If any one of the three loses, the $10 stake is gone and there is no partial payout for the two picks that did win. If one of the three pushes instead of losing, the treble does not void - it settles as a double on the other two legs, using their combined price instead of the full three-leg price of 7.33. Every figure here scales with the $10 stake.

Treble Payout on a $10 Stake by the Three Prices

The table below shows how a $10 treble’s payout changes with the three prices. Three picks at -110 each combine to 6.96 for a $59.58 profit. Three picks at even money, +100 each, push the combined price to 8.00 for a $70.00 profit. Stack three underdogs at +150, +150 and +200 and the price jumps to 18.75, turning $10 into a $187.50 payout and a $177.50 profit.

The Three Picks in Each Odds Format

The same three picks from the worked example look different by odds format. The Chiefs’ -150 is 1.67 in decimal, 2/3 as a fraction, implying a 60.0% chance. The Braves’ +100 is 2.00 in decimal, 1/1 as a fraction, implying a 50.0% chance. The Celtics’ +120 is 2.20 in decimal, 6/5 as a fraction, implying a 45.5% chance - the biggest underdog of the three.

How the Vig Compounds Across Three Legs

Three legs is where the compounding vig becomes hard to ignore. Every price in a treble already carries the sportsbook’s built-in margin, and multiplying three prices together multiplies three margins along with them. That is why the combined implied probability on the worked example sits at 13.6% - meaningfully above the true chance of the Chiefs, Braves and Celtics all winning at once. The house edge grows with every leg stacked into the parlay.

That compounding is the trade-off behind the treble’s outsized payout. A $10 stake turning into a $73.33 payout looks appealing, but the price reflects three separate margins stacked on three separate true probabilities, so the treble behaves more like a lottery ticket than a value bet unless each price carries genuine edge on its own.

The push rule offers some cushion against a near-miss. If one leg ties, it drops out of the calculation, and the treble settles as a double on the remaining two picks instead of being voided outright. That does nothing for an outright loss, though - a single leg losing still ends the whole bet, regardless of how the other two picks performed. Treat a treble as a swing for a big return, not a staple of a regular betting plan.

When a Treble Makes Sense

A treble makes the most sense as an occasional, capped-stake play rather than a routine part of a betting plan. Because all three picks have to win, the realistic chance of cashing is lower than a single or a double, even when each price looks reasonable. The appeal is the payout: a modest stake can turn into a return worth many times its size, which works best sized as a small piece of a bankroll rather than a core holding.

The picks that go into a treble matter more than the format itself. Three prices with genuine value - where a bettor’s own assessment beats what the book’s price implies - make a stronger treble than three picks chosen just because they combine into a big number. Favorites keep the combined price modest but improve the chance of all three landing; stacking underdogs raises the payout at the cost of a steeper ask.

A treble is worth reaching for when there is a specific reason to like all three picks, not simply because the payout looks attractive. It suits bettors comfortable with an all-or-nothing outcome who are not relying on the bet to carry their bankroll. Anyone who wants steadier, more frequent returns should prefer a single bet or a double, keeping a treble as an occasional swing sized so a loss does not dent the bankroll.

Common Mistakes

A few mistakes show up again and again with trebles. The most common is adding the three prices instead of multiplying the decimal odds, which produces a figure far below the real payout. Bettors also forget that all three picks must win - a single loss anywhere sinks the entire treble. Many underestimate how the vig compounds across three legs, since each price carries its own margin and those margins stack together. A push is sometimes mistaken for a loss, when it actually drops out and the treble settles as a double on the remaining two picks.

Treble vs a Double

A double and a treble work the same way - multiplying decimal odds together - but a treble adds a third pick, raising the payout ceiling while lowering the chance of collecting. Choosing between them comes down to how many picks you genuinely like: two strong prices favor a double, three favor a treble.