Closing Line Value Calculator
Benchmark your price against the close — the strongest predictor of long-run edge.
How to Use This Calculator
- Input the odds you secured at the moment you placed the bet
- Input the closing odds (the final price before the event kicked off)
- 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 does closing line value (CLV) measure?
Closing line value quantifies whether the odds you locked in beat the final (closing) price before an event begins. The closing line is treated as the most efficient price because it has absorbed all available information, so consistently outperforming it is the strongest signal of long-term betting profitability.
Why does CLV matter?
CLV is the single most reliable predictor of long-term betting success. Data shows bettors who steadily post positive CLV turn a profit over time even when individual results swing. It gauges skill rather than luck.
What counts as a strong CLV percentage?
Any consistently positive CLV points to a genuine edge. Even +1-2% CLV held across a large sample signals sharp betting capability. Professionals typically run a 2-5% average CLV across their wagers.
What's the right way to track CLV?
Log the odds you take on each bet, then capture the closing odds immediately before the event starts. Feed both into this calculator to measure the gap. Aggregate your average CLV across hundreds of bets to get a statistically meaningful read.