CLV CALCULATOR

CLV CALCULATOR

What Is Closing Line Value (CLV)?

Closing Line Value measures whether the odds you bet at were better or worse than the odds available right before the event started — the "closing line." If you got a better price than where the market ended up, you have positive CLV. Professional bettors treat this as the single best indicator of betting skill, since it strips out the luck of any individual result and measures whether you're consistently finding value against an efficient market.

How This Calculator Works

Enter the odds you actually bet at and the odds the line closed at, in either decimal or American format. The calculator converts both to a common decimal basis and computes the percentage difference between them — that's your CLV. It also shows the implied probability behind each price, so you can see exactly how the market's view shifted between your bet and kickoff.

This is a direct price comparison, not a no-vig calculation — a true no-vig CLV would require both sides of the closing market to remove the bookmaker's margin first. For most practical purposes, comparing your price directly against the closing price (especially against a sharp book like Pinnacle) is what most bettors actually track.

Why CLV Matters More Than Win/Loss Record

A single bet's outcome is mostly variance — even a well-placed bet loses plenty of the time. CLV is different: it's measured the moment the market closes, long before the result is known, so it isolates whether you found genuine value rather than whether you got lucky. Tracked across enough bets (a few hundred at minimum), consistently positive CLV is one of the most reliable predictors of long-term profitability in sports betting.

Frequently Asked Questions