Closing Line Value (CLV) Calculator

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Did you beat the closing line? Enter the odds you took and the closing odds for the same selection to see your CLV as a price percentage and in probability points. Add the opposite side's closing odds and it strips out the bookmaker margin for a truer, no-vig CLV.

Use a sharp book's price as the closing reference — Pinnacle is the industry standard. Convert fractional or American odds first with the Odds Converter.

Enter the odds you took and the closing odds to see your CLV.

How closing line value is worked out

For odds you took y and closing odds c:

CLV (price) = y ÷ c − 1, and CLV (probability) = (1 ÷ c − 1 ÷ y) in percentage points.

Example: you took 2.00 and it closed at 1.80. Price CLV = 2.00 ÷ 1.80 − 1 = +11.11%; probability CLV = 55.56% − 50.00% = +5.56 pp. You bought a better price than the market's sharpest estimate. If instead it closed at 2.40, price CLV = 2.00 ÷ 2.40 − 1 = −16.67% — you lost to the close.

Removing the margin (no-vig)

The raw closing odds still carry the bookmaker's margin, so comparing to them slightly overstates your edge. Enter the opposite side's closing odds and the tool converts both to probabilities, removes the margin, and compares your price to the fair closing probability. In the example above, a 1.80 / 2.10 close carries a 3.18% margin; the fair closing odds are 1.857, so the true CLV is +7.69% rather than +11.11%.

CLV measures the quality of the prices you take, not guaranteed profit — margin, prices you can't actually get filled at, and account limits all erode it. Track it over many bets, and bet within a fixed budget for entertainment, not income. Read our responsible gambling guide.

Calculations are exact from the numbers you enter. This tool is for information only and assumes decimal odds on a single selection.

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