Closing Line Value Tool
Measure your edge by comparing your price to the closing line — the best long-term signal.
How to Use This Calculator
- Input the odds you secured at the time you placed the bet
- Input the closing odds (the final odds before the event started)
- Input your stake amount
- The tool returns your CLV percentage, edge, and expected profit
Formula
CLV % = (Your Odds / Closing Odds - 1) x 100
Edge = Closing Probability x (Your Odds - 1) - (1 - Closing Probability)
Expected Profit = Edge x Stake
Where Closing Probability = 1 / Closing Decimal Odds
Frequently Asked Questions
What is closing line value (CLV)?
CLV gauges whether you beat the final (closing) odds set before an event begins. The closing line is treated as the sharpest price because it reflects all available information. Consistently topping it is the clearest sign of long-term profitability.
Why does CLV matter?
CLV is the strongest predictor of long-term betting success. Studies show bettors who steadily post positive CLV turn a profit over time even when individual results swing. It tracks skill, not luck.
What counts as good CLV?
Any steadily positive CLV signals an edge. Even +1-2% CLV held across many bets points to sharp betting. Pros typically run 2-5% average CLV over their bets.
How is CLV tracked?
Log the odds you take on each bet, then note the closing odds just before kickoff. Run the difference through this calculator. Average your CLV over hundreds of bets to get a meaningful sample.