Free betting calculators.
The math a serious bettor runs before every ticket — odds conversion, parlay pricing, vig, and expected value. Exact numbers, no account, no gating.
Runline Calculator
Size a paired moneyline and −1.5 runline bet and read the effective odds of the combined play.
Moneyline to Runline
Convert a moneyline to its implied win probability and decimal odds before sizing the runline.
Odds Converter
Flip any price between American, decimal, and fractional formats with exact implied probability.
Parlay Calculator
Combine up to 12 legs into one price and see the payout and the probability you are buying.
Vig Calculator
Measure the juice in any two-way market and compute the no-vig fair odds of each side.
EV Calculator
Price your edge: expected value per $100 from your odds and a fair win probability.
Running the numbers is the free half. Tracking every pick against the closing line is the other half.