Measure decimal odds movement, percentage change, implied probability movement, and percentage-point change between two quoted prices.
Enter the labeled values, keeping every amount in one currency and every probability in percent. Select the settlement convention where offered, then press Calculate. Changing an input marks the previous result as needing an update.
The prefilled values are a reproducible example. Press Calculate to derive the result from those inputs; no result is hard-coded. Try one value at a time to see which part of the calculation changes.
This browser-only tool uses the values you supply. It does not fetch live odds, verify an operator’s rules, predict results, or guarantee a return. Confirm settlement terms before relying on the output.
Market rules can change voids, deductions, timing, and eligible outcomes; this calculator uses only the assumptions shown.
Yes. Calculations retain full JavaScript precision and round only displayed values.
No. It calculates the entered scenario and does not predict sporting results.
Yes. Currency amounts are unit-neutral, so use the same currency for every money input.
Confirm the market definition, settlement rules, odds format, stake, and responsible gambling limits.