The number 1 sports directory for sharps & best betting resources for sports bettors
Tools for the bettor! Betting math is fundamental to sports betting success. On this page we have several interactive sports betting calculators and pro bettors tools for sports bettors to try out and have some fun with. Sharp bettors can make real use of these precise and accurate betting calculators, from calculating the math of expected value, to CLV, to optimal stake sizing for risk with the Kelly formula. You can also convert American odds to decimal odds, work out p-values easily for your bet sample, and see how much commission (or vigorish, vig, juice) you are paying via bookmaker margin (overround or hold). There's also a super efficient course fit predictive model for golf bettors...
Fundamental math and betting equations are essential to successful & serious betting. We've put a few INTERACTIVE calculators together that can be used for running the numbers on important concepts such as expected value, staking & risk in sports betting. Ever wondered how likely 4/5 is in an acca?
Expected value or EV is the concept of working out how much you would win or lose per bet if you could play the bet out under the same conditions an infinite no. of times. For the expected value calculator above you need to estimate the probability of a win and a loss and put them into the calculator along with your stake and potential profit.
The no. 1 course fit prediction model. Fill in your player ratings in each department and the weightings of the key metrics for course premiums (1-3 with 3 being strongest). The model will churn out a course fit-o-meter rating. A score of 8/10 is neutral. 9/10 would be equivalent to an expected strokes gained course fit per round of ~ 1 stroke.
Closing line value is similar to EV in that it's a percentage differential from betting odds taken vs the theoretical fair odds or line. The difference is EV is against the price you originate or estimate, while CLV is measured against the closing line or betting odds, which is often formed from the "wisdom of the crowd" (*pinches salt*). Just input your odds acquired vs the closing line odds into the CLV calculator and fire it up.
The p-value or probability value calculator works out the chance of your betting results from sample size having occurred by random chance. A low p-value means there's likely a good deal of skill involved in your betting and prediction. Just fill in your number of bets, your yield / ROI%, and your average odds from your bet sample, and the p-value calculator will do the rest.
A vital part of beating the odds and the sports betting market is knowing about and understanding the bookmaker margin or "hold". This is a profit and protection margin that generates the bookmaker commission (or vigorish). You only need to input the odds of the 2-way market selections and the Vig calculator will do the rest. It works proportionally re the margin.
The Kelly Criterion or the Kelly formula is the optimal staking formula for sports betting EV and bank growth. We use the fractional Kelly (or 30%) calculator to estimate risk and calculate the optimal stake size.
One for the bayes! Calculate conditional probability, and if you've ever wondered just how unlucky you were when you get 4 out of 5 up in an acca.....well now you can see you weren't unlucky at all with our multiples probability acca betting calculator!