CLV Calculator
Closing Line Value is the single sharpest signal of long-run profitability. Enter your bets and the closing odds; see per-bet CLV, average CLV, and beat-the-close rate.
Enter the price you took and the line at game time. CLV is the percentage gain over the close. Long-run, average CLV predicts your ROI better than win/loss does.
CLV is the only number that matters early
Win-loss tells you if you got lucky. CLV tells you if you're betting smart. The dashboard makes the latter automatic.
Auto-tracked closing lines
ThunderBet snapshots the closing line for every market. Inside the dashboard, your bet tracker auto-fills the closing odds and computes CLV the instant a game starts. No manual data entry.
Sharp consensus close, not single-book
Single-book closes are noisy. The dashboard computes CLV against the no-vig consensus from sharp books (Pinnacle, Circa, BetCRIS) for a more honest measure of beat-the-close.
Per-sport CLV breakdown
You might beat the close on NBA spreads but lose on MLB totals. The dashboard breaks CLV down by sport, market, and book so you can find where your edge actually lives.
Statistical significance flags
A 5-bet sample with +6% CLV could be noise. The dashboard shows confidence bands so you know whether your aggregate CLV is real signal or sampling variance, and how many more bets it would take to be sure.
Frequently asked questions
Closing Line Value (CLV) is the percentage gain you got over the line at game time. If you bet a +110 underdog and the line closed at +100, you got a better price than the market settled at, and your CLV is positive.
Win-loss is high variance and depends on small samples. CLV is computable on every single bet immediately. Sharp bettors know that beating the close at +2% on average produces +2% expected ROI long-run, before vig drag. CLV converges fast; W/L converges slowly.
CLV percent = (your decimal odds / closing decimal odds) - 1. Bet at +110 (decimal 2.10), close at +100 (decimal 2.00): CLV = 2.10 / 2.00 - 1 = +5%. The calculator does this for every bet you enter, then averages.
Most pros target average CLV of +2% or higher. The typical vig at -110/-110 is about 4.5%, so beating the close by 2% leaves a net edge of roughly -2.5% before factoring in line shopping. Beating the close by 4 to 5% on average is real edge territory.
Live bets do not have a meaningful 'close,' so CLV is mostly a pre-game metric. For live bets, sharp bettors track edge against the model price they bet into rather than the close. The dashboard handles both.
Stop typing, start tracking
The dashboard CLV view auto-fills closing lines for every bet in your tracker, breaks results down by sport and market, and tells you when your sample is statistically meaningful.