Betting Calculators
Nine dedicated tools for odds, staking, and risk — each one built around a single formula you can see and check for yourself. No live odds feed, no predictions, just correct maths run on the numbers you provide.
Odds Converter
Switch a price between decimal, fractional, and American instantly, plus implied probability and a full 71-row reference table.
Stake & Return Calculator
Enter a stake and a price to see your total return and profit, worked out and shown separately.
Expected Value (EV) Calculator
Weigh your own probability estimate against the price on offer to see if a bet has a genuine edge.
Parlay / Accumulator Calculator
Stack as many legs as your slip needs — combined odds and total payout update as you add each one.
Arbitrage Calculator
Compare two bookmaker prices on the same event for a guaranteed return, and the exact stake split.
Kelly Criterion Calculator
Sizes a stake from your bankroll, the price, and your own estimated edge, with full, half, and quarter options.
Hedging Calculator
Odds moved since your original bet? Work out the exact stake needed on the other side to lock in a return either way.
Each-Way Bet Calculator
Win and place returns worked out separately, with standard racing place terms built in.
Bankroll & Unit Size Calculator
Turns a bankroll and a chosen percentage into a real unit stake, plus your weekly exposure.
Why trust the numbers?
Every calculator here is tested against known reference figures before it’s published — the odds converter, for instance, is checked line by line against a published 71-row conversion table. Nothing on this page pulls in live prices or predicts outcomes; each tool takes the numbers you type in and runs the correct formula against them, every time.
Spot something that looks off? Flag it — it’ll get checked properly.
Frequently asked questions