Free tools · no account needed
Free betting calculators.
Compare two prices, understand the odds or check a stake split.
Compare two prices
See how the potential return changes at the same stake.
Compare pricesOdds calculator
See the potential return, profit and implied probability behind a decimal price.
Check oddsArbitrage calculator
Enter two opposing prices. See the whole-dollar split and what each outcome returns.
Check a splitDutching calculator
Split a budget across your chosen runners. See the return for each and the loss if another wins.
Split a racing budgetKelly criterion calculator
Test full, half and quarter Kelly, then see how a different probability assumption changes the stake.
Test the assumptionStart here. Go further when you want.
01 · Public
A quick answer
Use these calculators and read the guides. No sign-up, no card.
02 · Free account
Your BetBible
Full Odds, Stats and Racing tools, with BetBot to help you find your way.
03 · Membership
More to work with
Arbs, +EV and deeper BetBot in one membership. Upgrade when it makes sense for you.
Keep going
Ready to compare actual prices?
Compare bookmaker odds, explore Stats and Racing, and ask BetBot with a free account.
No card. No automatic trial.