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NBA Odds: How to Read the Spread, Moneyline and Totals
Type a sportsbook's NBA line into the reader below. It shows what each side must do, the chance each price implies, the margin and the fair price for NBA betting.
- Team: away on top, home below.
- Spread: points given (−) or taken (+), its price below.
- Moneyline: the price to win the game, overtime included.
- Total: both teams’ points, over (O) or under (U), its price below.
Point spread
- Suns −4.5
- Suns must win by 5 or more.
Price 1.91 / −110: implied chance 52.4%; without the margin 50.0%, fair price 2.00 / +100. - Magic +4.5
- Magic wins the bet by winning the game or losing by 4 or fewer.
Price 1.91 / −110: implied chance 52.4%; without the margin 50.0%, fair price 2.00 / +100.
Margin: 52.4% + 52.4% = 104.8%, so the book keeps an edge of 4.76% over the whole.
Our ratings: Suns covers −4.5 in 42.9%, Magic 57.1%. Our coin-flip line: Suns −2.
Moneyline
- Suns
- Suns must win the game, overtime included.
Price 1.54 / −185: implied chance 64.9%; without the margin 62.3%, fair price 1.60 / −166. - Magic
- Magic must win the game, overtime included.
Price 2.55 / +155: implied chance 39.2%; without the margin 37.7%, fair price 2.66 / +166.
Margin: 64.9% + 39.2% = 104.1%, so the book keeps an edge of 4.13% over the whole.
Our ratings: Suns 56% (fair 1.80 / −125), Magic 44% (fair 2.25 / +125).
Without its margin the moneyline gives Suns 62.3%; our ratings give 55.6%.
Total (over/under)
- Over 226.5
- Both teams together score 227 or more.
Price 1.91 / −110: implied chance 52.4%; without the margin 50.0%, fair price 2.00 / +100. - Under 226.5
- Both teams together score 226 or fewer.
Price 1.91 / −110: implied chance 52.4%; without the margin 50.0%, fair price 2.00 / +100.
Margin: 52.4% + 52.4% = 104.8%, so the book keeps an edge of 4.76% over the whole.
Our ratings say who is stronger, not how many points a game will have, so they give no chance for the total. This season’s games so far average 226.9 points (121 games).
Margin removed in proportion to each side’s implied chance. Spread chances: final margin taken as normal around the ratings’ expected margin. Model chances are estimates from past results, not tips.
Updated 2026-11-05 09:07 UTC
How the fair prices are calculated
Ratings. Every team has an Elo rating built from every game since 1984–85 (FiveThirtyEight’s method; our code reproduces their published ratings game by game). Before a game the home team’s chance is 1 ÷ (1 + 10−(home rating − visitor rating + 60) ÷ 400): playing at home is worth 60 rating points, so between equal teams the home side wins 58.5%. After each game both ratings move by 20 × (result − chance) × a margin factor: a blowout moves them more than a one-point game, a favourite’s blowout less than an underdog’s. Each new season starts 40% of the way from last season’s rating to the average.
Settings. The step (20), the home edge (60) and the carry-over are the best of a grid on the seasons 2010–11 to 2022–23 (lowest log-loss of the pre-game chances); 2023–24 to 2025–26 were kept aside to test them.
Fair odds are 1 ÷ chance: the price with no bookmaker margin. A rating knows only past results – not injuries, rest days or who sits out.
Spread and chance. The ratings give the home team a chance p. The final margin is taken as normal around an expected margin of 14.1 × Φ−1(p), with a spread of 14.1 points: so the chance to win is exactly p, and the chance to cover a line follows from the same curve. 14.1 is the value that fits the margins of the 3,693 regular-season games of 2023–24 to 2025–26 best; on 2010–11 to 2022–23 it was 12.5: NBA margins have become wider. A 5-point favourite wins about 64%, a 10-point favourite about 76%.
Check on the same games: how often the favourite of the ratings won, and won big, against the formula. It is right on wins and close by 6 points; blowouts happen a little less often than the normal curve says.
| Favourite of the ratings | Formula | In the results |
|---|---|---|
| Won the game | 67.0% | 66.9% |
| Won by 6 or more | 52.7% | 53.1% |
| Won by 11 or more | 39.4% | 37.1% |
| Won by 16 or more | 27.3% | 24.6% |
Margin. Each price implies a chance of 1 ÷ decimal price; the two add up to more than 100%. The extra is the margin. We take it out in proportion to each side’s chance, the most common method; our margin calculator shows the others.
How good is the model
Hold-out test. The settings were fixed on the seasons 2010–11 to 2022–23; then the ratings forecast every one of the 3,693 regular-season games of 2023–24 to 2025–26 before tip-off. Lower log-loss and Brier scores are better; “always the home team” gives the home side its win rate of the fit seasons, 57.9%.
| Forecast | Winner picked | Log-loss | Brier |
|---|---|---|---|
| Our ratings (Elo) | 66.9% | 0.607 | 0.210 |
| Always the home team | 54.7% | 0.691 | 0.249 |
| Coin flip (50/50) | 50.0% | 0.693 | 0.250 |
No market comparison. We found no free source of NBA closing betting lines that may be published, so this card cannot show how the ratings do against the betting market – which knows injuries and rest days and is usually sharper. Use our chances as a second opinion, not as a reason to bet.
This season, for real: over its 121 regular-season games so far the ratings picked the winner in 60% (home team 51%); log-loss 0.634 (coin 0.693).
Calibration on the hold-out games: when the ratings gave the home team a chance in a range, how often it won.
| We gave the home team | Games | Home team won |
|---|---|---|
| 0%–20% (on average 16%) | 90 | 7% |
| 20%–35% (on average 29%) | 442 | 25% |
| 35%–50% (on average 43%) | 744 | 40% |
| 50%–65% (on average 58%) | 1,031 | 55% |
| 65%–80% (on average 72%) | 924 | 69% |
| 80%–100% (on average 85%) | 462 | 85% |
In-sample, seasons 2010–11 to 2022–23 (15,421 games): ratings 66.0% winners picked, log-loss 0.613; home team 57.9%.
Margin calculator →Point spread explained →NBA power rankings by the numbers (Elo) →NBA Cup standings and knockout chances →
Data: schedule and scores from balldontlie, checked every 6 hours against Wikipedia (team season pages and standings; licence CC BY-SA) – a score or a record that differs stops the update. Rating history before 2015–16: FiveThirtyEight NBA Elo (CC BY). Rules: NBA tie-break procedures, NBA: Play-In Tournament.
The three NBA bets
| Bet | What you bet on | What has to happen | Example price |
|---|---|---|---|
| Point spread | Margin of victory | Your team is ahead once the spread is added to its score | −110 on each side |
| Moneyline | Who wins the game | Your team wins the game | −200 favourite, +150 underdog |
| Total (over/under) | Combined points of both teams | Total lands above (over) or below (under) the line | −110 on each side |
Prices are examples. Whether overtime counts is in the house rules – check them. More: point spread, moneyline, over/under.
How to read one NBA spread line
- Find the favouriteThe team with minus points is the favourite. It must win by more than the spread for the bet to win.
- Find the underdogThe team with plus points is the underdog. The bet wins if it wins the game or loses by less than the spread.
- Check for a half pointA half point means no push: one side wins. On a whole number, a result exactly on the line is a push: stake back.
- Read the priceThe price next to the points is the cost. At −110, you risk $110.00 to win $100.
- Read the totalOver wins if both teams together score more than the line. Under wins if they score fewer. Exactly on a whole-number line is a push.
The margin in a two-way line
Margin = chance of side A + chance of side B − the whole (all outcomes together)
Example: −110 on both sides: 52.4% + 52.4% = 104.8%, a margin of 4.76%. Fair chance with the margin removed: 50.0% each.
Sportsbook price vs fair price
Sportsbook price
- Includes the margin: both sides add up to more than the whole
- Example: −110 on both sides implies 52.4% each
- Remove the margin with the margin calculator
Fair price from Elo ratings
- Margin removed: both sides add up to the whole
- FiveThirtyEight NBA Elo method, built only from past game results
- The winner takes rating points from the loser; a bigger win moves more
- An underdog's big win moves more points than a favourite's rout
- Includes a home edge; none at a neutral site
- Between seasons, each rating moves part way back to the league average
- Does not know injuries, rest days, trades or lineups
How accurate the NBA ratings are
Higher-rated team won
66.9%How often the team the ratings favoured, home edge included, won on seasons the settings did not see.
Home team won
54.7%How often the home team won in the same games – the simple baseline to compare with.
Games checked
3,693Seasons 2023–24 to 2025–26. The settings were chosen on older seasons only.
No market comparison
We have no licensed NBA sportsbook line data, so the ratings are not compared with sportsbook lines.
Where the ratings come from
FiveThirtyEight's public NBA Elo file (CC BY 4.0). Our version reproduces their published ratings. See today's ratings in the power rankings.
Data sources
- github.com /fivethirtyeight/data · checked Nov 1, 2026
- balldontlie.io /terms · checked Nov 1, 2026
Questions
How do you read NBA odds?
Each line shows the bet type, the points or total, and a price. A minus price shows what you risk to win $100. A plus price shows what a $100 bet wins. Switch formats in the odds converter.
What does a minus sign mean on an NBA spread?
The team with minus points is the favourite and must win by more than the spread. The team with plus points covers by winning or by losing by less than the spread.
What does −110 mean in basketball betting?
You risk $110.00 to win $100. A winning $10.00 bet returns $19.09, of which $9.09 is profit. The price implies a 52.4% chance.
Does overtime count in NBA betting?
It depends on the sportsbook. Check its house rules for spreads, moneylines and totals before you bet.
Are Elo ratings more accurate than sportsbook NBA odds?
We do not claim that. We have no licensed NBA sportsbook line data to compare with. The ratings use only past results, not injuries, rest days or lineups.