Bet Boost Calculator
Sportsbook boosts can be great — and they can also be marketing dressing on a worse price. Drop in the boosted odds and the standard market price and we'll show you whether the boost actually beats fair value.
The promo price, e.g. +200
Same bet, non-boosted price
Opposing side, for devigging
How much you'd put on it
This boost is priced above the fair market — you have a real edge. Worth taking.
How to read a boost
A "30% odds boost" sounds great until you check what the unboosted price was. Sportsbooks sometimes start with a price below fair value, then "boost" it back to roughly fair — or even still below it.
The only honest test is to compare the boosted price to the devigged market consensus. That's exactly what this calculator does.
- Find the same bet at a standard (non-boosted) sportsbook.
- Grab both sides and paste them in — we'll devig automatically.
- Compare your boosted price to the fair odds we return.
- Positive edge = take it. Negative edge = skip it, no matter how flashy the promo looks.
Worked example — is this DraftKings boost actually +EV?
- 1DraftKings boosts Bills moneyline from +170 to +200Headline: '+30 odds boost!'
- 2Same game on Pinnacle: Bills +180 / Chiefs −210
- 3Pinnacle Bills implied: 100/(180+100) = 35.71%
- 4Pinnacle Chiefs implied: 210/(210+100) = 67.74%
- 5Sum: 103.45%Pinnacle hold = 3.45%
- 6Devigged Bills fair prob: 35.71 / 103.45 = 34.52%Fair price ≈ +190
- 7Boost (+200) vs fair (+190): +1.6% edgeEV per $100 = +$1.55
Frequently asked questions
Are sportsbook boosts always worth taking?+
No. A 'boost' only means the price was raised from the book's starting price — which may itself have been worse than fair. The real test is whether the boosted price beats the no-vig market consensus. Many boosts (especially same-game parlays) are still −EV after the boost.
What boost percentage actually matters?+
Ignore the headline number. A '50% boost' from +200 to +300 sounds huge but tells you nothing without the fair price. If fair was +350, you're still getting a bad deal. If fair was +250, you have real edge.
Why do SGP boosts usually look better than they are?+
Same-game parlays are correlated, so the true probability is higher than the multiplied legs suggest — but books price them as if legs were independent. The 'boost' often just brings the price closer to fair, not above it.
Which boosts are usually +EV?+
Straight moneyline and spread boosts on single games tend to be the most honest. SGP and 'mega' parlay boosts are usually −EV even after the boost. Same-game token boosts on a single player prop are often the best opportunities.
How big an edge should I need to take a boost?+
Anything above 0% is technically +EV, but factor in book risk (limits, voided promos) and your own bankroll. Most sharp bettors target ≥2% edge on boosts to make the effort worthwhile.
Skip the manual lookup
The Bet Analyzer handles the market lookup for you — paste a sportsbook screenshot and you'll get the fair price, edge, and an A–F grade in seconds.