Free calculator
Odds Boost EV Calculator
Worth taking at this fair probability.
How to use it
Change any input and the results update immediately. The values are also written into the address bar, so you can bookmark a calculation or paste the link to someone else and they will see exactly the same numbers.
Everything here computes with the same functions that produce the grades inside WeBall, so a number on this page will never contradict a number on a bet card.
What the term means
A promotion that improves the price on a specific bet above its normal number.
Books offer boosts to drive volume: a +150 parlay bumped to +200, or a 30% profit boost on a chosen wager. Some are genuinely valuable, and boosts are one of the few sources of positive expected value available to a recreational bettor.
Full definition of odds boost →
Learn the math behind it
A calculator is faster than doing this by hand, but knowing why the formula works is what lets you spot when a number is wrong. Read the full guide →