Closing Line Value Helper
Compare your odds to the closing line to see if you're beating the market over time.
How to Use This Calculator
- Enter the odds you actually got at the moment you placed your bet
- Add the closing odds (the last odds available right before the event kicked off)
- Pop in your stake amount
- See your CLV percentage, your edge, and your 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 tells you whether you grabbed better odds than the final (closing) price before an event begins. The closing line is seen as the sharpest, most accurate price because it reflects all the information out there. Regularly beating it is the single clearest sign that you can be profitable over the long haul.
Why does CLV matter so much?
CLV is the best single predictor of long-term betting success. Studies show that bettors who keep posting positive CLV end up profitable over time, even when their individual results bounce around. It reflects skill rather than luck.
What counts as a good CLV percentage?
Any steady, positive CLV points to an edge. Even a sustained +1-2% CLV across plenty of bets suggests sharp betting. Pros usually land somewhere around 2-5% average CLV over their bets.
How should I keep track of my CLV?
Note the odds you take on each bet, then check the closing odds just before the event starts. Use this calculator to work out the gap. Follow your average CLV across hundreds of bets so you have a meaningful sample to judge.