Closing Line Value Betting Tool
Benchmark your odds against the closing line, the strongest predictor of long-term edge.
How to Use This Calculator
- Record the odds you secured at the moment the bet was struck
- Record the closing odds, that is, the final price standing just before the event began
- State the size of your stake
- The tool then reports your CLV percentage, your edge, and the 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 does closing line value (CLV) mean?
Closing line value gauges whether the odds you obtained bettered the final, or closing, price ahead of an event. The closing line is regarded as the most efficient price available, since it absorbs every piece of information in the market. Beating it time and again is the surest sign of long-run betting profitability.
Why does CLV matter so much?
CLV stands as the single finest predictor of lasting betting success. Studies demonstrate that bettors who routinely record positive CLV turn a profit over time, even when their individual results swing about. It is a measure of skill rather than fortune.
What counts as a strong CLV percentage?
Any reliably positive CLV points to an edge. Even a sustained +1-2% CLV across a great many bets signals sharp judgement. The professional ranks typically post average CLV of 2-5% over their wagers.
How should I keep track of my CLV?
Note the odds you accept on every bet, then consult the closing odds in the moments before the event kicks off. This calculator measures the gap between the two. Follow your average CLV over hundreds of bets to build a sample worth trusting.