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Closing Line Value (CLV) Calculator — Did You Beat the Line?

Calculate closing line value (CLV): compare the odds you took with the closing odds to see whether you beat the market, and by how much.

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✨ Key Capabilities

CLV percentage for any odds pair
Implied probabilities for taken and closing odds
Clear verdict: beat the line or not
Works with American odds, positive and negative

📖 How to Use the Closing Line Value (CLV) Calculator — Did You Beat the Line?

Enter the American odds you took.
Enter the closing American odds.
Read your CLV percentage and implied probabilities.

❓ Frequently Asked Questions

What is closing line value (CLV)?

Closing line value measures whether the odds you bet at were better than the odds at close. Positive CLV means you beat the closing line — a key sign of long-term betting skill.

How is CLV calculated?

Convert both odds to decimal form, then divide the odds you took by the closing odds and subtract 1. Example: taking +150 when it closes at +100 gives (2.50 / 2.00 - 1) = +25% CLV.

Does positive CLV guarantee a winning bet?

No. Positive CLV means you got a better price than the closing market, which is profitable over many bets — but any single bet can still lose.