Free tools
Betting calculators
Pick a calculator
Arbitrage
Arbitrage calculator
Enter the odds for every outcome and get the stake split that pays the same whichever way it goes — plus the real profit once stakes are rounded.
Fair odds
No-vig calculator
Strip the bookmaker's margin out of a price set to get fair probabilities and break-even odds. Five methods, including Shin and power.
Value
Expected value calculator
Compare a fair price against what you are being offered. Returns the edge, the break-even price and the expected value on your stake.
Staking
Kelly criterion calculator
Turn an edge into a stake. Full Kelly and the fractional versions most bettors should actually use.
The order they go in
They are four steps of one process rather than four unrelated tools, and the sequence is what makes any of it work:
- De-vig a sharp price.Take Pinnacle's market and remove the margin — that gives you a fair probability, which is the closest thing to a true probability available for free. No-vig calculator.
- Compare it against a softer book. If the soft price is longer than the fair price, the bet is +EV. Expected value calculator.
- Decide the stake. Size it against your bankroll and the size of the edge, not against how much you like it. Kelly calculator.
- Or skip the estimate entirely. When two books disagree enough that every outcome can be backed profitably, no probability is needed at all. Arbitrage calculator.
GoldEdge runs all four continuously across Pinnacle, Bet365, Betano and Stake — the odds comparison board is public if you want to see the input data without an account.
For research, not betting advice. Positive expected value is an edge across many bets, never a prediction about one. Bet only what you can afford to lose. 18+.