Free Betting Calculators

Calculate arbitrage stake sizing, expected value, and no-vig fair lines. Same math we use in our live arb, middles, and +EV feeds — free, no signup.

Arbitrage Calculator

Enter the prices on each leg and your first stake. We size every other leg so the payout matches, then show your guaranteed profit. Learn more.

Leg 1 odds

Leg 1 stake

Leg 2 odds

Leg 3 odds (optional)

Enter at least two valid American odds (≥ +100 or ≤ −100) and a positive stake to calculate.

Expected Value Calculator

Compare the price you can get against your fair (no-vig) line to find long-term edge and the recommended Kelly stake. Learn more.

Offered odds (the price you can bet)

Fair odds (your true line)

Enter both prices in American odds (≥ +100 or ≤ −100) to calculate.

Devig Calculator

Strip the sportsbook's margin out of any market and see the no-vig fair price for each side. Uses the same power method we use across our feeds. Learn more.

Side 1 odds

Side 2 odds

Side 3 odds (optional)

Enter at least two valid American odds (≥ +100 or ≤ −100) to remove the vig.