Calculate closing line value (CLV) from the decimal odds you bet and the closing odds, with each price’s implied probability and how far the line moved.
Closing Line Value Formula and Method
Price CLV = (bet decimal odds / closing decimal odds − 1) × 100
Compare the decimal price accepted with the closing price on exactly the same selection and line. Price-based CLV divides the earlier price by the closing price and subtracts one. A larger earlier price creates a positive percentage because it provides a larger return per unit stake.
How to Use This Calculator
Enter the decimal price when placed and the closing decimal price for the identical selection and line. Select Calculate, then open Calculation details for the formula and probability comparison.
Worked Example
With the example inputs in the table, the result is 10%. A positive value means your entered price pays more than the closing price on the same selection.
Input and Example Guide
| Input or category | Example or weight | Entry guidance |
|---|---|---|
| Price when placed (decimal odds) | 2.2 | Use the stated unit; retain available precision. |
| Closing price for the identical selection (decimal odds) | 2 | Use the stated unit; retain available precision. |
| Price-based closing-line value | 10% | Calculated result for the entered example. |
Interpreting the Result
The separate implied-probability movement subtracts the reciprocals in percentage-point terms. It is not the same percentage as price CLV. A changed handicap, total, overtime rule or market margin can make the comparison misleading. CLV describes prices, not the profit actually settled on the ticket.
Compare identical lines and settlement terms. Unadjusted closing odds include margin; price CLV is not realized ROI or an estimate of true expected value.
Assumptions and Common Input Errors
A positive value means the placed price pays more per unit stake than the closing price. Keep selection, line and settlement conditions identical; prices must exceed 1 and be at most 1,000,000.
Saving and Revising a Scenario
A successful calculation is saved as structured inputs in this browser and recomputed on restoration. Editing retains the previous result with a clear stale warning. Reset empties the fields and clears this calculator’s saved data. Other same-site scripts may access browser storage.
Sources
Betfair Help, Decimal Odds and Stake-Inclusive Returns, reviewed 2026. Arithmetic and scenario assumptions are specified above.
