Closing Line Value Calculator

Compare the line you got at bet time to where the market closed. Consistent positive CLV is the single best predictor of long-term profitability.

Inputs

Which side did you take?

Your bet lineThe line you got, e.g. +3.5 or 215.5 (use sign as written by the book).

Closing lineWhere the market closed for the same side.

Result

Line CLV+0.5 pts

What this means

Positive CLV. You bet at a 0.5-point better number than the line closed. This is the strongest leading indicator of long-term profitability.

Track CLV across at least 200 bets to draw reliable conclusions about your edge.

Formula

Spread / Total
  CLV = (your_line − closing_line)    if you took underdog/over
      = (closing_line − your_line)    if you took favorite/under

Moneyline
  your_implied = 1 / decimal(your_odds)
  closing_implied = 1 / decimal(closing_odds)
  CLV = closing_implied − your_implied
      (positive = you got a better price than close)

Closing Line Value (CLV)