Calculator Form
Enter player stats, team context, and league context. Results appear above this form after submission.
Example Data Table
Use this sample row to understand typical entries before calculating a real player record.
| Player | Team | Label | MIN | PTS | FGM | FGA | 3PM | FTM | FTA | AST | ORB | DRB | STL | BLK | TOV | PF | Team AST | Team FG | Team Pace | League Pace | Season Scale |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sample Player | Sample Team | 2025-26 Sample | 34 | 28 | 10 | 19 | 4 | 4 | 5 | 7 | 2 | 5 | 2 | 1 | 3 | 2 | 27 | 41 | 99.8 | 99.8 | 1.00 |
Formula Used
Factor = (2/3) − [0.5 × (League AST / League FG)] ÷ [2 × (League FG / League FT)]
VOP = League Points ÷ (League FGA − League ORB + League TOV + 0.44 × League FTA)
DRB% = (League TRB − League ORB) ÷ League TRB
uPER = [3PM + (2/3 × AST) + adjusted FG value + adjusted FT value − turnover cost − missed shot cost − missed free throw cost + rebound value + steal value + block value − foul cost] ÷ Minutes
aPER = uPER × (League Pace ÷ Team Pace)
Estimated PER = aPER × Season Normalization Factor
This is an advanced Hollinger-style estimate. Official published PER can differ because some data providers apply season-specific constants, pace models, or source-specific rounding.
How to Use This Calculator
- Enter player details so exports and reports identify the record correctly.
- Fill in the full player box score, including shooting, rebounds, defensive actions, turnovers, and fouls.
- Add team assists, team field goals made, and team pace to support context-sensitive adjustments.
- Provide league totals for scoring, shooting, rebounds, pace, and fouls.
- Press Calculate Rating. Review the results above the form, then export CSV or PDF if needed.
Frequently Asked Questions
1. What does player efficiency rating measure?
It estimates how much positive box score value a player creates per minute after subtracting harmful events like misses, fouls, and turnovers.
2. Is this exactly the same as an official league PER?
Not always. Official values can differ by season constants, pace models, source data, and rounding rules. This tool provides a strong advanced estimate.
3. Why do I need team and league context?
PER is not just a raw box score total. It adjusts player events using league efficiency and team assist context to better value each action.
4. Why is pace included in the calculation?
Pace matters because faster teams create more possessions. The adjustment helps compare players from quicker and slower environments more fairly.
5. What is the season normalization factor?
It is a custom multiplier you can use when you want your estimated rating scaled to a preferred season framework or published benchmark.
6. Can I use this for one game or a full season?
Yes. Single-game inputs give a game-level estimate, while season totals or per-game aggregates can be used for broader performance review.
7. Why can two players with equal points get different ratings?
Because PER also values efficiency, assists, steals, rebounds, blocks, and penalizes empty possessions. Scoring alone does not determine impact.
8. Which result should I trust most here?
Use Estimated PER for your main headline value, then check uPER, aPER, TS%, eFG%, and Game Score for deeper context.