NBA Net Rating: The Metric That Reveals True Elite Teams

A team has a 35-25 record. Another sits at 32-28.

Which one is better?

The first one, obviously. They have 3 more wins.

Not so fast. The first team played an easy schedule and won a lot of close games. The second faced tough opponents and lost several overtime games.

Net Rating tells you the truth: the second team is probably better.

This metric measures the difference between points scored and allowed per 100 possessions — removing the influence of pace and revealing a team's true efficiency.

What Is Net Rating?

The Definition

Net Rating (NRtg) is the difference between a team's Offensive Rating and Defensive Rating.

Net Rating = Offensive Rating - Defensive Rating

Offensive Rating (ORtg)

Offensive Rating measures how many points a team scores per 100 possessions.

Offensive Rating = (Points Scored / Possessions) x 100

ORtg	Interpretation
> 118	Elite offense
115-118	Very good offense
112-115	Good offense
109-112	Average offense
106-109	Below-average offense
< 106	Struggling offense

Defensive Rating (DRtg)

Defensive Rating measures how many points a team allows per 100 possessions.

Defensive Rating = (Points Allowed / Possessions) x 100

DRtg	Interpretation
< 108	Elite defense
108-111	Very good defense
111-114	Good defense
114-117	Average defense
117-120	Below-average defense
> 120	Struggling defense

Note: For defense, a lower number is better (fewer points allowed).

Combined Net Rating

Net Rating	Interpretation
> +8	Elite team, contender
+5 to +8	Very good team
+2 to +5	Above-average team
-2 to +2	Average team
-5 to -2	Below-average team
< -5	Weak team

Why Use Net Rating?

The Problem with Win-Loss Records

Win-loss records are influenced by factors that don't predict future performance:

Factor	Impact on Record
Close games (clutch)	High variance, low predictive value
Strength of schedule	Inflates or deflates the record
Sporadic injuries	Record doesn't reflect full roster talent
Pure luck	Bounces, contested shots, officiating

Net Rating Cuts Through the Noise

Net Rating measures average performance, not outcomes:

Record: "How many games did you win?"
Net Rating: "By how much do you dominate on average?"

Team	Record	Net Rating	Diagnosis
A	38-22	+2.5	Inflated record (clutch, schedule)
B	32-28	+5.8	Deflated record (bad luck, schedule)
C	35-25	+4.2	Aligned with talent

Team B is probably the best despite the worse record.

Correlation with Future Results

Studies show Net Rating predicts the future better than win-loss records:

Metric	Correlation with future record
Current record	0.65
Net Rating	0.75
Point differential	0.72

Net Rating is 15% more predictive than win-loss record.

Analyzing Net Rating in Detail

Breaking Down Offensive Rating

ORtg depends on several factors:

Factor	Impact on ORtg
eFG% (Effective FG%)	Shooting efficiency
TOV% (Turnover Rate)	Ball security
ORB% (Offensive Rebound Rate)	Second-chance points
FT Rate	Free throws generated

These are Dean Oliver's "Four Factors," which explain roughly 90% of ORtg.

Breaking Down Defensive Rating

DRtg depends on the same factors on the opponent's side:

Factor	Impact on DRtg
Opponent eFG%	Preventing efficient shots
Opponent TOV%	Forcing turnovers
DRB% (Defensive Rebound Rate)	Limiting second chances
Opponent FT Rate	Avoiding fouls

The ORtg/DRtg Balance

ORtg	DRtg	Net Rating	Profile
118	110	+8	Elite on both ends
120	116	+4	Offense-dominant
112	106	+6	Defense-dominant
115	115	0	Balanced but average

Net Rating and Pace

What Is Pace?

Pace measures the number of possessions per game for a team.

Pace = Possessions per 48 minutes

Pace	Style
> 102	Fast-paced (run & gun)
98-102	Average pace
< 98	Slow-paced (half-court)

Why Net Rating Is "Pace-Adjusted"

Net Rating is calculated per 100 possessions, which neutralizes pace:

Team A: 110 points in 100 possessions = ORtg 110
Team B: 110 points in 95 possessions = ORtg 115.8

Team B is more efficient despite scoring the same number of points.

Why Pace Matters for Totals

We cover Pace in greater depth in a dedicated article, as it is crucial for totals betting.

Net Rating Variations

"Clutch" Net Rating

Net Rating in close situations (within 5 points in the last 5 minutes):

Clutch Net Rating	Interpretation
> +5	Excellent in crunch time
-5 to +5	Inconsistent
< -5	Struggles in crunch time

Caution: Clutch Net Rating relies on a small sample size and is less predictive.

Net Rating by Lineup

Every 5-man combination has its own Net Rating:

Lineup	Minutes	Net Rating	Notes
Starting five	200	+12.5	Highly effective
Bench unit	150	-3.2	Struggling
"Death lineup"	80	+18.4	Dominant

Net Rating Home vs. Away

Situation	Typical Net Rating
Home	+3 to +4 vs. average
Away	-3 to -4 vs. average

The home/away gap is approximately 6-8 Net Rating points in the NBA. For a thorough analysis of this factor, check out our guide on Home Court Advantage.

Using Net Rating for Betting

Strategy #1: Comparing Net Ratings

To estimate a spread:

Estimated Spread ~ (Net Rating A - Net Rating B) / 2.5 + Home Court Advantage

Net Rating A	Net Rating B	HCA	Estimated Spread
+8	+2	A at home	A -5 to -6
+5	-3	B at home	A -1 to -2
+10	+10	A at home	A -3

Strategy #2: Identifying Undervalued Teams

Compare Net Rating with the record:

Net Rating	Record	Win %	Diagnosis
+6	28-32	47%	Undervalued (unlucky)
+1	38-22	63%	Overvalued (lucky)
+4	35-25	58%	Aligned

Bet on undervalued teams — their Net Rating suggests they should be winning more. This is the core principle of value betting.

Strategy #3: Recent vs. Season-Long Net Rating

Recent form matters:

10-Game Net Rating	Season Net Rating	Signal
+10	+5	Hot streak, overperforming
+2	+7	Struggling
+6	+6	Stable

Strategy #4: Cross-Referencing ORtg vs. Opponent DRtg

To estimate a team's scoring output:

Team A ORtg vs. Team B DRtg = Expected efficiency for A

Points A ~ (ORtg A + DRtg B) / 2 x (Combined Pace / 100)

ORtg A	DRtg B	Game Pace	Estimated Points A
118	115	100	~116-117
112	108	98	~108-109
115	120	102	~119-120

The "Pythagorean Win %"

The Pythagorean Formula in Basketball

The Pythagorean Win % estimates the winning percentage a team "should" have based on points scored and allowed:

Pythagorean Win % = Points For^14 / (Points For^14 + Points Against^14)

(The exponent varies across studies, typically between 13.91 and 16.5)

Comparing with Actual Record

Team	Actual Record	Pyth Win %	Difference
A	65% (39-21)	58%	+7% (lucky)
B	55% (33-27)	62%	-7% (unlucky)
C	60% (36-24)	59%	Aligned

Team B will likely improve, while Team A will likely regress.

Link to Net Rating

Pythagorean Win % and Net Rating are highly correlated:

Net Rating	Approx. Pyth Win %
+10	~73%
+5	~62%
0	~50%
-5	~38%
-10	~27%

Net Rating in the Playoffs

Regular Season vs. Playoffs

In the playoffs, Net Rating dynamics change:

Factor	Impact
Fewer games	Higher variance
Adjustments	Teams adapt during a series
Stars in playoff mode	Elevated individual performance
Officiating	Different (fewer fouls called)

Does Net Rating Predict Playoff Success?

Season Net Rating	Playoff Win %
> +8	68%
+5 to +8	55%
+2 to +5	48%
< +2	35%

Net Rating remains predictive but with higher variance in the playoffs.

Full Example: Net Rating Analysis

The Game

Celtics @ Heat — Tuesday

The Data

Team	Record	Net Rating	ORtg	DRtg	Pace
Boston	42-18	+9.2	120.5	111.3	99.8
Miami	35-25	+3.8	113.2	109.4	97.5

The Analysis

Boston: - Elite Net Rating (+9.2) - Dominant ORtg (120.5) — best offense in the NBA - Solid DRtg (111.3) - Record aligned with Net Rating - True elite team

Miami: - Good Net Rating (+3.8) - Defense (109.4) stronger than offense (113.2) - Slow Pace (97.5) — controls the tempo - Defensive team, capable of slowing the game down

Calculating the Spread

Net Rating differential: +9.2 - (+3.8) = +5.4
Spread conversion: 5.4 / 2.5 ~ 2.2 points
Miami HCA: +3 points

Estimated spread: Boston -2.2 + 3 = Miami +0.8
Or roughly: Boston -1 / Pick'em

The Bookmaker's Line

Spread: Boston -4.5
Total: 215.5

The Verdict

Spread analysis: - Our estimate: Boston -1 or pick'em - Line: Boston -4.5 - Gap: 3.5 points in Miami's favor - Miami +4.5 is potentially good value

Totals analysis: - Miami plays slowly (Pace 97.5) - Boston's elite offense meets Miami's stout defense - Estimated combined pace: ~98.5 - Under worth considering (Miami imposes its tempo)

Recommended bets: 1. Miami +4.5 (value on the spread) 2. Under 215.5 (Miami imposes its pace)

Where to Find Net Rating

Free Sources

Source	URL	Data
NBA.com/stats	nba.com/stats	ORtg, DRtg, official Net Rating
Basketball Reference	basketball-reference.com	Net Rating, Four Factors
Cleaning the Glass	cleaningtheglass.com	Net Rating filtered (no garbage time)
ESPN	espn.com/nba/stats	Advanced stats

Key Columns to Look For

Column	Meaning
ORtg	Offensive Rating
DRtg	Defensive Rating
NRtg	Net Rating
Pace	Possessions per game
eFG%	Effective Field Goal %

Cleaning the Glass: The Gold Standard

Cleaning the Glass filters out garbage time and non-competitive situations, providing a "purer" Net Rating:

Standard Net Rating: Includes everything
CTG Net Rating: Excludes garbage time (games already decided)

CTG is often more predictive.

Common Mistakes

Mistake #1: Relying Solely on Win-Loss Record

Wrong: "They have 40 wins, they must be better"
Right: "They have 40 wins but a Net Rating of +2 — they've been lucky"

Mistake #2: Ignoring Context

Wrong: "Net Rating +8, elite team"
Right: "Net Rating +8 but based on 30 games — limited sample size"

Mistake #3: Forgetting Home Court Advantage

Wrong: "Boston +9 NRtg vs Miami +4 NRtg = Boston -2"
Right: "Boston +9 vs Miami +4 BUT Miami at home = tighter game"

Mistake #4: Not Looking at ORtg and DRtg Separately

Wrong: "Both have +5 Net Rating, same level"
Right: "A is +5 (offense 118, defense 113), B is +5 (offense 110, defense 105) — different styles"

Mistake #5: Ignoring Injuries

Wrong: "Their Net Rating is +10"
Right: "Their Net Rating is +10 WITH their star, -2 WITHOUT her"

How ProbWin Uses Net Rating

Our NBA model integrates Net Rating as a core metric:

1. Season-long Net Rating (garbage time filtered)
2. Recent Net Rating (10-15 games)
3. ORtg and DRtg separately
4. ORtg vs. opponent DRtg cross-reference
5. Pace adjustment for the matchup
6. Net Rating by lineup (when available)
7. Comparison with the market line

Net Rating is more predictive than win-loss record — we prioritize it. Discover how our AI uses these metrics to generate profitable picks.

Check out our NBA picks to see this analysis in action.

Summary: Net Rating in 7 Key Points

#	Takeaway
1	Net Rating = ORtg - DRtg (points per 100 possessions)
2	Net Rating > +5 = good team, > +8 = elite
3	More predictive than win-loss record (~15% better)
4	Compare with record to find mispriced teams
5	Look at ORtg and DRtg separately to understand a team's style
6	Recent Net Rating reveals current form
7	Don't forget Home Court Advantage (+3 pts)

Next Steps

You now understand Net Rating. But to estimate NBA totals, you're missing a crucial piece: Pace.

Discover how Pace influences the number of possessions — and therefore the number of points — and how to use it to find value on Over/Under markets.