Closing Line Value (CLV) Calculator
CLV is the difference between the odds you got and the odds when the market closed — the single best predictor of long-term betting profit. Calculate one bet, paste a batch, or download the table as a CSV.
You beat the closing line by +5.0%. Over many bets, consistently positive CLV is the strongest predictor of long-term profit — it means you're getting better prices than the market settles on.
What is closing line value?
Closing line value (CLV) is a sports betting performance metric that measures the gap between the decimal odds you got at the time of your bet and the decimal odds when the market closed. The formula is CLV % = (odds taken ÷ closing odds) − 1. If you bet at 2.10 and the line closed at 2.00, your CLV is +5% — you got a 5% better price than the market's eventual consensus.
CLV matters more than short-term win rate or short-term ROI for one reason: closing odds are the sharpest price the market produces. They reflect every dollar of information that flowed into the market — sharp bettor action, late injury news, weather, everything. Consistently beating closing odds is what professionals call "beating the close," and academic studies have shown it correlates with long-term profitability far more strongly than the win rate of any individual sample.
That's why this CLV tracker matters. A single bet's result is mostly variance. A win rate over 50 bets is noisy. But your average CLV across 200+ bets is a stable signal of edge — if it's positive, you're picking value bets the market hasn't yet priced in. The batch entry above lets you compute average CLV across your full bet history, and the CSV download lets you take the data into a spreadsheet for deeper closing-line-value tracking and analysis.
Related reading
- What is closing line value and why it matters — the concept, in depth.
- Line shopping: how small edges compound into real ROI — how CLV connects to bookmaker selection.
- Expected value (EV) in sports betting: 3 worked examples — the math behind why CLV predicts profit.
Track CLV automatically across every bet you place
OddsLab logs your bet odds, captures the closing line from 100+ bookmakers, and computes CLV on every bet automatically — with a rolling 30/90-day trend chart so you can see if your edge is holding. No more manual spreadsheets.
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