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Welcome to DietBet 4!

We call it The Kickstarter because sometimes you just need a short swift kick in the pants to get you on the right track. This is it!

You've got 4 weeks to lose 4% of your starting weight. To begin, everyone puts money into the pot. After four weeks, whoever's hit their 4% goal is a winner and splits the pot.
Join a game now or start your own.



Find a game or start your own

Choose from open games starting soon.
Or start your own and challenge your friends.

FIND A DIETBET 4 or start your own game

Try it risk-free!

Cancel up to 7 days into your game and get a full refund.

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Weigh In.

on your mark, get set ... weigh in!

Two days before your game begins, you'll be prompted to submit your official starting weight.
Our standard weigh-in process involves you submitting two photos, one of you on a scale in airport security attire; another of the scale's readout with your weigh-in word.

NOTE: We never post weigh-in photos and
your actual weight is kept private by default.
What you'll need...
a scale (preferably digital)
a digital camera or smartphone
A full-length mirror or someone to take your photo

We have a photo review process in which players submit proof of their initial and final weights to our team of Referees. We also have algorithms that detect unusual activity within a game or across games and use an auditing system where some players may be required to submit extra proof of their weight loss using a video weigh-in. If you are flagged by our system for unusual weight loss behavior, you will have to submit a video weigh-in for all games going forward until the flag has been removed by our DietBet Referees. This includes both initial and final weigh-ins. Failure to comply will result in disqualification and forfeiture of your winnings and initial bet. You may also be banned from playing again and subject to other penalties. To see the legal fine print, click here.

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game on!

Congratulations, your starting weight has been approved!
You've now got 28 days to lose 4%. Use DietBet to post photos, comments, and get weight-loss tips. Make sure to invite friends to cheer you on.

Update your weight as often as you like. Self-reported weigh-ins during the game are unofficial but can help hold you accountable.

DietBet on the go with your phone!
Nothing saps the spirit of your rivals faster than a photo of the salad you just ate (just as the waiter is putting a slice of cake in front of them.)

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Weigh Out.

you're almost there!

After the final day, you will have 48 hours to weigh out. Even if you have not won, please enter your final weight. You will not be required to submit photos for verification unless you are a winner.

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You won!

wow, you just got paid to lose weight!

48 hours after your game ends, the results are made official and the pot (less DietBet's fee) is divided among the winners. Winners are notified by email of their payout, which is credited to their DietBet account. You can apply your winnings to your next DietBet or cash out now via PayPal and treat yourself to something special ... you earned it!

New! "No Lose Guarantee"
This guarantee ensures that if you win your dietbet, you won't lose money. Most winners make money (about 1.5 to 2x on average) but in the event that your game has an unusually high percentage of winners, we'll forfeit our cut in order to ensure that nobody loses money. So the worst case scenario is that you'll end up losing weight for free, which is still a big win.

FIND ANOTHER GAME or create your own
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It's called Social Dieting

DietBet is not winner-take-all. Everyone who loses the weight splits the pot evenly.

How do you prevent cheating?

Players will submit official weigh-in photos at the start and end of a game. DietBet will verify each photo and certify the final winners.

Um, is this gambling?

Nope. DietBet is not a game of chance. Believe it or not, your weight is under your control.
Learn more

Still have questions?

Check out our FAQs., read the Official Rules, or Contact Us. We'll be happy to answer any question.