What Is a Double Bet? How Doubles Work and How They're Calculated

Last updated: 6 November 2026

What is a double bet? It's one bet on two selections in different events, and both have to win. Whatever the first one returns rides on the second, so £10 on a 2/1 shot and a 6/4 shot comes back as £75.

What Is a Double Bet?

Double bet meaning, in plain terms: a double links two selections from different events into one bet, and both have to win. That's what doubles mean in betting. Whatever the first leg returns becomes the stake on the second, so £10 at 2/1 and 6/4 returns £75. If either leg loses, so does the bet.

It's the smallest accumulator you can build.

The Midnite Take: Double Bets: Two Picks, One Bet, Both Need to Deliver

By Dave Learmont, Creative Copy Lead at Midnite

A double is one of the simplest multiple bets around. Two selections, combined into a single bet, with both needing to win for the double to pay out.

The winnings from the first selection roll on to the second, which means the potential return is higher than backing either selection individually at the same stake.

Sounds straightforward. And it is.

The catch? If either selection loses, the double loses too. It's a bit like needing your striker to score and your keeper to keep a clean sheet. Both parts have to do their job.

Different sports, same principle. Two results. One bet.

How Does a Double Bet Work?

A double bet works as a roll-over. Leg one settles first, and everything it returns (stake plus winnings) goes on leg two at that leg's price. That's how a double can survive the afternoon results and still have everything riding on the teatime kick-off.

The two selections have to come from different events. Results inside one match are linked, so Midnite's bet slip flags linked selections before you place the bet, and same-match combinations belong in a Bet Builder instead.

To place one on Midnite, add two selections from different events and switch the bet slip to Multiples, where it shows as Double with its To Return figure. For football, the Acca Builder works too, though it doesn't cover horse racing.

Here's the double bet explained against two singles, with the same £10 outlay:

The prices are examples, not Midnite odds. The double pays far more when both win because two results landing together is less likely than either one on its own.

How to Work Out a Double Bet

To work out a double bet, settle leg one as a single, then use the whole return as the stake on leg two. Here's the £10 example at 2/1 and 6/4:

That's £75 back, or £65 profit once your £10 comes off. As a formula in words: multiply the stake by the first price and add the stake back, then repeat with that total at the second price.

Each-Way Doubles

An each-way double is two bets: a win double and a place double, each for the full unit stake, so £10 each way costs £20. The place double uses each horse's win price cut to the race's each-way terms.

Say both horses run in races of eight or more runners that aren't handicaps, where Midnite pays 3 places at 1/5 the odds. The 2/1 shot places at 2/5 and the 6/4 shot at 3/10.

• Both win: the win double returns £75 and the place double £18.20 (£10 at 2/5 is £14, then £14 at 3/10 is £18.20). Total back: £93.20.
• Both place, one or neither wins: the win double loses and the place double returns £18.20, a £1.80 loss on the £20.
• Either horse finishes outside the places: both doubles lose, and the £20 is gone.

What Happens If One Leg Is Void, a Non-Runner or a Dead Heat?

A void leg or a non-runner drops out, and the double is settled as a single on the other selection. That's section 17.4 of Midnite's Terms and Conditions, which also cuts the To Return figure to match.

• Void leg: if the 6/4 match is postponed and voided, the £10 settles as a £10 single at 2/1, returning £30.
• Dead heat: Midnite's general sports betting rules divide the stake by the number of winners. If the 2/1 leg dead-heats with one other, £5 counts at 2/1 and returns £15, which then rolls on at 6/4 to return £37.50.
• Boosted doubles: pre-built multiples carrying an Odds Boost work differently. Midnite's Football Accumulator Guide says one void leg in a Boosted Market makes the whole bet void, and the racing rules do the same for a non-runner in a boosted racing market. Check the terms on each boost.

Double vs Treble vs Accumulator

A double is two legs, a treble is three, and four or more is usually called an accumulator bet. Every leg has to win in all three, and each extra leg lengthens the price because the bet gets less likely to land. Midnite's help centre treats anything with two or more legs as an acca.

One thing can't go into a double: a Bet Builder. Each one is tied to a single match and can't be mixed with other events.

Doubles also sit inside bigger bets: a Trixie is three doubles and a treble.

Doubles in Horse Racing

What is a double bet in horse racing? It's two horses in two different races, both needing to win, or both needing to place for the place half of an each-way double.

If one horse is a non-runner, Midnite's racing rules settle that leg as void and the bet stands on the other horse as a single. Place terms go by the runners that actually take part, so a late withdrawal can cut the places paid on an each-way double. Our guide to betting on horse racing and horse racing betting terms glossary cover the rest.

Double, Double Chance, Double Result and Double or Nothing

Four bets share the word. Only one is a double.

• Double chance is one market on one match, covering two of the three results (home or draw, away or draw, either team to win). It's a single bet, not a multiple.
• What is double result bet? It's the half-time/full-time market: one match, nine combinations, and both results have to be right. Still one bet.
• Double or nothing is a gambling phrase for owing twice as much on a loss or nothing on a win. It isn't a bet type at Midnite.

Bet Responsibly

Only put on a double what you're happy to lose, because one leg going wrong takes the whole stake with it.

Midnite's account has a Safer Gambling section where you can set deposit limits by the day, week or month, add a Net Spend Limit, or take a Cool Off for anything between 24 hours and 30 days. The full set is in the Responsible Play hub, and BeGambleAware offers free, confidential support. 18+.

FAQs

What Is a Double Bet in Horse Racing?

A bet on two horses in two different races, where both have to win for it to pay. If one is a non-runner, the bet settles as a single on the other.

How Is a Double Calculated?

Multiply your stake through both prices in turn: £10 at 2/1 makes £30, and £30 at 6/4 makes £75.

Can You Give Me an Example of a Double Chance Bet?

Say a home side is 1/3 to win or draw, an example price rather than a Midnite one. £9 on 1X returns £12 if they win or draw and loses if the away side wins. Our double chance guide has more.

What's a Double or Nothing Bet?

It isn't a bet type. It's a phrase for agreeing to owe twice as much on a loss or nothing on a win, and Midnite doesn't offer it.

Two Out of Two

So what does a double bet mean in practice? Two selections in one bet, both have to win, and leg one's return rides on leg two. Pick your two from Midnite's horse racing or the football Acca Builder.

Midnite is licensed and regulated by the Great Britain Gambling Commission. 18+. Please gamble responsibly.

For the record, Midnite is the official UK and Ireland sports betting partner of the NFL, and in 2026/27 partners Wolves, Middlesbrough, Sheffield United and Southampton, as well as the World Snooker Tour.

About the author

Jordan Willmott is Sportsbook Experience Senior Manager at Midnite, where he leads the team behind sportsbook operations and propositions, from bet settlement and price boosts to the range of markets and specials available across every sport on site. He has spent 13 years in sportsbook and trading, previously in similar roles at BetVictor, Sporting Index and Sky Betting & Gaming. He writes here on how markets are built, made available and settled once the whistle goes. Connect with Jordan on LinkedIn.