Free Betting Tools

Measure closing line value, then benchmark it against measured market diagnostics.

Separate process from outcome — was your bet good process, or just lucky?

What’s actually been winning — win rate, ROI and closing value by sport, market and odds band.

Strip the bookmaker margin from any market to get the true fair odds and probabilities.

Compare your price to a fair line and see the expected value + suggested stake.

The optimal bet size for your edge — full, half and quarter Kelly.

Convert American, decimal and fractional odds — and see implied probability.

Turn any price into the win probability it implies — and back into fair odds.

Combine legs for the parlay odds, payout, profit and true implied probability.

Check two prices for a guaranteed-profit arb, with the exact stake split.

Lock a guaranteed profit (or cut a loss) by betting the other side.

Measure the sportsbook’s margin (vig) baked into any market.

Bet both sides of a moved line — profit if the middle hits, cost if it misses.

Convert a free (bonus) bet into guaranteed cash and see your conversion rate.

Predict football match odds and scorelines from each team’s expected goals.