// betting maths · calculators
Odds tools
Quick calculators for reading a price. Everything runs on your device. Your preferred odds format is remembered on this device.
Odds converter
Type in any box and the others update. Prices on ProbaLab show in your chosen format: Example: 1.80
Fair price
Enter a win chance to see the minimum odds worth taking.
Value check
Enter a price and a win chance.
Unit size (quarter Kelly)
Enter your bank, the price and a win chance.
Quarter Kelly stakes a quarter of the full Kelly fraction to keep swings smaller. 1 unit = 1% of bank.
For entertainment, not advice. These are maths helpers; they don't know anything about a game.