Odds Boost Value Calculator
Calculate the true value of sportsbook odds boosts
Odds before the boost
Odds after the boost
Enter your own probability estimate for custom EV calculation
| EV Range | Rating | Recommendation |
|---|---|---|
| +5% or higher | Excellent | Max bet - strong +EV opportunity |
| +2% to +5% | Good | Worth betting - solid value |
| 0% to +2% | Fair | Marginal value - bet if you like the pick |
| Below 0% | Poor | Skip - boost doesn't overcome the vig |
An odds boost is a promotional offer from sportsbooks that increases the payout on specific bets. For example, a bet that normally pays +150 might be boosted to +200, giving you a higher return if you win. But are these boosts actually valuable, or just marketing gimmicks?
How to Evaluate Odds Boosts
Not all odds boosts are created equal. To determine if a boost is worth taking, you need to calculate the expected value (EV) - the average amount you'd win or lose per bet over time. A positive EV (+EV) means the boost is profitable in the long run.
The Math Behind Boost Value
Expected Value = (Win Probability × Profit) - (Loss Probability × Stake)
The key is estimating the true win probability. Original odds typically include a 4-6% vig (sportsbook margin), so the implied probability is higher than the true probability. Our calculator estimates fair probability by removing this vig.
When Boosts Are Most Valuable
- Large percentage boosts - A 50% profit boost is more valuable than 20%
- Boosts on favorites - Higher base probability means more value from the boost
- Boosts on low-vig markets - Moneylines typically have less vig than props
- Boosts with high max bets - $50 max limits your potential profit
Common Boost Traps
Sportsbooks often boost parlays or long-shot props that already have high vig. A "boosted" +500 parlay might still be -EV because the original odds were so unfavorable. Always calculate the true value before betting.
