Closing Line Value Calculator – Measure Your CLV

Want to know if the odds you took were better than the market’s closing price?

Enter your bet odds and the closing odds below. Our free CLV calculator shows whether you beat the closing line and by how much.

What Is Closing Line Value in Sports Betting?

Closing line value, or CLV, compares the price you took when you placed a bet with the market price when betting closed.

If you bet at +120 and the same selection closes at +100, you beat the closing price.

That is positive CLV.

If you took -120 and it later closes at -105, you got the worse price.

That is negative CLV.

CLV does not tell you whether the bet won. It tells you whether you got a better or worse price than the market eventually settled on.

What Does the Closing Line Value Calculator Show?

The calculator compares your entry odds with the closing odds for the same selection.

It shows:

• price CLV %
• entry implied probability
• closing implied probability
• probability shift
• whether you beat the closing price
• optional potential-profit difference
• spread or total movement, if you add the lines

This gives you two useful views of the same bet: how the price moved and, when relevant, how the actual spread or total moved.

How to Use the CLV Calculator

Enter the odds you received when you placed the bet and the final closing odds.

Example:

Your odds: +120
Closing odds: +100

The calculator converts both prices to decimal odds and compares them.

You can also enter your stake if you want to see how much extra potential profit your earlier price offered.

For spread or total bets, open the line comparison and enter the original and closing lines too.

For example:

You bet: +5.5
Closing line: +4.5

Even if both were priced at -110, you still beat the closing line by one point.

That line movement matters, so our calculator reports it separately instead of pretending the one-point difference has a universal percentage value.

How Is Closing Line Value Calculated?

For price-based CLV, our calculator uses:

CLV = (Entry Decimal Odds ÷ Closing Decimal Odds − 1) × 100

Example:

Entry odds: 2.20
Closing odds: 2.00

2.20 ÷ 2.00 = 1.10

CLV = +10%

So you received a price 10% higher than the closing price.

A current 2026 explanation from Sportmonks uses the same decimal-price CLV formula and also notes that different analytics products may express closing-line movement differently.

That is why we show the formula instead of hiding it behind a score.

What Does Positive CLV Mean?

Positive CLV means the price you took was better than the closing price.

Example:

You bet: +150
Market closes: +130

Your +150 pays more for the same winning outcome.

In decimal odds:

+150 = 2.50
+130 = 2.30

Your price CLV is about:

(2.50 ÷ 2.30 − 1) × 100 = +8.70%

You beat the close.

That does not mean the bet was guaranteed to win. It means you bought the same outcome at a better price than someone betting at the close.

What Does Negative CLV Mean?

Negative CLV means the market eventually offered a better price than the one you took.

Example:

You bet: -140
Closing odds: -120

You paid more for the selection than a bettor could have paid closer to the start of the event.

One negative-CLV bet means very little by itself.

But if your betting history repeatedly shows that your prices become worse by closing time, it is worth reviewing when and how you are placing bets.

Can You Have Positive CLV and Still Lose the Bet?

Yes. Positive CLV and winning the bet are completely different things.

You could take +150 on a team that closes +120 and still watch that team lose badly.

You still had positive CLV because your price was better than the closing market price.

This distinction matters because one game tells you very little about whether the price was good.

A result answers:

Did the bet win?

CLV answers:

Did I get a better price than the market eventually offered?

Those are different questions.

Can You Win a Bet With Negative CLV?

Yes.

Suppose you take -150 and the market later closes -120.

You have negative CLV.

The team can still win and your ticket can still cash.

Winning does not retroactively make the price good.

That is one reason judging betting decisions only from wins and losses can be misleading.

CLV vs Implied Probability

Closing line value compares two prices.

Implied probability converts an individual price into the probability represented by those odds.

For example:

+150 = 40.00% implied probability

+120 = 45.45% implied probability

If you took +150 and the market closed +120, the closing market implied a higher probability for your selection than when you placed the bet.

Our calculator shows both numbers so you can see that movement directly.

If you only need to convert one price into a percentage, use the Implied Probability Calculator.

Should You Remove Vig Before Measuring CLV?

It depends on what you are trying to measure.

If your goal is simply:

“Did I get +120 when this exact selection later closed +100?”

you can compare those prices directly.

But closing sportsbook prices still contain bookmaker margin.

If you are trying to compare the market’s estimated fair probability rather than simply the quoted price, removing the vig can give you another view.

Use the No Vig Calculator when you want to estimate the fair market probabilities across all outcomes.

Do not mix the two measurements without understanding what each one represents.

Price CLV measures your quoted price against the closing quoted price.

No-vig analysis estimates what the complete market looks like after removing bookmaker margin.

Price CLV vs Line CLV

Sports bettors often use “CLV” to describe two related but different things.

Price CLV

You took:

Team A +120

It closed:

Team A +100

You beat the closing price.

Line CLV

You took:

Team A +5.5

It closed:

Team A +4.5

You beat the closing line by one point.

Both can matter.

But one point of NFL spread movement is not mathematically identical to one point in an NBA total, NHL puck line, or player prop.

That is why our calculator does not convert every line move into a fake universal CLV percentage.

It shows the line difference separately.

Closing Line Value Example With a Spread

Suppose you bet:

Team A +6.5 at -110

The market later closes:

Team A +4.5 at -110

Your odds did not change.

But your line did.

You have two extra points compared with someone betting at the close.

If Team A loses by 5 or 6:

Your +6.5 bet wins.

The closing +4.5 bet loses.

That is real line value even though an odds-only CLV calculator would show 0% because both prices were -110.

This is exactly why tracking only the odds can miss an important part of CLV for spreads and totals.

Closing Line Value Example With Odds

Now suppose the line stays the same but the price moves.

You bet:

Over 45.5 at +105

It closes:

Over 45.5 at -115

Same total.

Different price.

You took a substantially better payout than the bettor entering at the close.

Our calculator captures this as positive price CLV.

For a complete betting record, tracking both the line and the price is better than storing only one.

What Is a Good Closing Line Value?

There is no universal CLV percentage that automatically makes someone a profitable bettor.

+1% CLV is better than -1% on the same measurement.

But saying:

“Anything above 3% is good”

without context is too simplistic.

CLV depends on:

• sport
• market type
• liquidity
• sportsbook
• timing
• how you define the closing price
• whether you track price, line, or both
• the vig in the market

A more useful goal is consistency.

If you repeatedly get better prices or lines than the eventual close across a large sample, that is more informative than chasing one impressive CLV number.

Does Closing Line Value Matter?

Yes, CLV can be useful because it measures the quality of the price you obtained without depending on whether one particular bet won.

Imagine two bettors.

Bettor A constantly takes +120 on selections that later close +100.

Bettor B constantly takes -120 on selections that later close +100.

They might have similar short-term win-loss records because results are noisy.

But they are consistently paying very different prices.

CLV helps expose that difference.

It is best used as a long-term tracking metric, not as proof that every individual bet was correct.

Is Positive CLV the Same as Positive Expected Value?

No.

Positive CLV means you beat the closing market price.

Positive expected value means your estimated probability makes the available odds mathematically profitable.

Those ideas can overlap, but they are not identical.

Suppose you take +150 and it closes +130.

You have positive CLV.

But whether +150 was genuinely +EV depends on the actual probability of the outcome.

If you estimate the probability yourself, use our Expected Value Calculator to test the bet against your probability estimate.

You can also use the Betting Value Calculator when comparing your estimated fair probability with the sportsbook price.

Why Can Different CLV Calculators Show Different Results?

Because CLV does not have one single presentation standard across every betting tool.

One calculator may compare decimal odds directly.

Another may compare implied probabilities.

Another may remove the vig first.

Another may calculate line movement instead of price movement.

All of those can produce different-looking numbers from the same bet.

This does not automatically mean one is wrong.

It means you need to know what is being measured.

BetBuzz24 uses the direct decimal-price formula for price CLV and shows implied-probability movement separately.

For spread and total changes, we report the line difference separately.

That way you can see exactly what happened instead of receiving one unexplained percentage.

Which Closing Price Should You Use?

Use a consistent definition.

If you placed the original bet at Sportsbook A, the cleanest comparison is usually the closing price for the same market and selection at Sportsbook A.

Do not take:

Entry price from Book A

and compare it with:

Closing price from Book B

then treat that as Book A CLV.

Sportsbooks can close at different prices.

Whatever source you choose, use the same method across your betting history.

Consistency matters more than picking whichever closing line makes your earlier bet look best.

When Is the Closing Line Actually “Closed”?

For pre-match CLV, the closing price normally means the final available pre-game price shortly before the event begins.

That sounds simple, but odds can update rapidly.

Different odds trackers may capture the last price at slightly different times.

That is another reason tiny CLV differences should not be over-interpreted.

If your tracker shows +1.02% and another shows +0.84%, that difference may simply come from data timing or rounding.

Focus more on consistent direction and larger samples.

How to Track CLV Over Time

Do not judge your CLV from three bets.

Track it across your betting history.

For each bet, save:

• date
• sport
• market
• selection
• line when bet
• odds when bet
• closing line
• closing odds
• sportsbook
• CLV
• result

The result is still worth recording.

Just do not use the result to calculate CLV.

After enough bets, you can start asking better questions:

Do I beat the close more often in NFL than NBA?

Do I get better CLV when betting early?

Are my player props moving against me?

Do I consistently get good lines but poor prices?

That is much more useful than staring at a single winning ticket.

Why You Can Have Good CLV and Still Be Losing Money

Variance.

You can beat the closing price repeatedly and still have a losing stretch.

Suppose you regularly bet underdogs at +150 that close +130.

Your pricing looks good.

But underdogs still lose frequently.

A run of bad outcomes can therefore leave your account down even while you are consistently beating the close.

CLV is not a promise of short-term profit.

It is a way of evaluating whether the prices you take tend to improve or deteriorate afterward.

Should You Chase Line Movement Just to Get Positive CLV?

No.

Once the market has moved, the old price is gone.

Forcing another bet simply because you want your CLV tracker to look good makes no sense.

CLV should measure your decisions.

It should not become the reason you make them.

The useful question before betting remains:

Is this price worth taking now?

Not:

Will this make my CLV chart green later?

Related Betting Calculators

Use the calculator that matches the question you are trying to answer:

• No Vig Calculator — remove bookmaker margin and estimate fair market odds
• Implied Probability Calculator — convert betting odds into implied probability
• Expected Value Calculator — calculate EV using your own probability estimate
• Betting Value Calculator — compare your fair probability with the sportsbook price
• Betting Odds Calculator — convert American, decimal, and fractional odds

CLV is another piece of the pricing workflow. It does not replace any of these calculations.

Closing Line Value FAQs

What is CLV in betting?

CLV means closing line value. It compares the odds or line you received when placing a bet with the market price or line available near closing time.

What is a closing line value calculator?

A closing line value calculator compares your entry odds with the closing odds and measures whether your original price was better or worse than the close.

How do you calculate closing line value?

One common price-based formula is:

(Entry Decimal Odds ÷ Closing Decimal Odds − 1) × 100

If you took 2.20 and the market closed at 2.00, your price CLV is +10%.

What does positive CLV mean?

Positive CLV means you received a better price than the eventual closing price for the same selection.

What does negative CLV mean?

Negative CLV means the closing market offered a better price than the one you originally took.

Can I have positive CLV on a losing bet?

Yes. CLV measures price movement, not whether the bet won. A losing bet can still have positive CLV.

Can I win with negative CLV?

Yes. A bet with negative CLV can still win. The result and the quality of the price are separate measurements.

What is a good CLV percentage?

There is no universal percentage that guarantees profitable betting. Consistently positive CLV across a meaningful number of comparable bets is more useful than one unusually high reading.

Does CLV work for spreads?

Yes, but spread CLV should also consider line movement. Taking +6.5 when the market closes +4.5 can be valuable even if the odds remain -110.

Does CLV work for totals?

Yes. You can compare both the price and the total. An Over 44.5 ticket can have useful closing-line value if the market later closes Over 46.5, even when the attached odds barely change.

Is closing line value the same as expected value?

No. CLV compares your bet with the closing market. Expected value compares the offered odds with your estimate of the outcome probability.

Does positive CLV guarantee long-term profit?

No. Positive CLV is a useful pricing signal, but it does not guarantee profit. Results still depend on whether the underlying market probabilities and your betting decisions are genuinely favorable over time.