Calculate Corsi For percentage (CF%) in hockey from shot attempts for and against, with the Corsi differential and total attempts in the same sample.
Corsi Formula
Corsi counts shots on goal (goals plus saved shots), missed shots, and attempts blocked by opponents within the chosen game state. Goals are already included in shots on goal and must not be counted twice. For a player’s on-ice Corsi, use team attempts while that player is on the ice, not just that player’s individual shots.
How to Use This Calculator
- Enter counts from one consistent player, team, game state, and sample.
- Choose the requested result when a solve-for option is shown.
- Select Calculate and review both the primary result and calculation steps.
- Use Reset before starting a different sample.
Example
Fifty-five attempts for and 45 against equals 55.00 CF% and a +10 differential.
Input and Result Guide
| Item | How to use it |
|---|---|
| CF | Shot attempts for |
| CA | Shot attempts against |
| Important | Use the same game state and sample for both counts |
How to Interpret the Result
Use the result with counts from the same competition level, reporting provider, strength state, and date range. Shot-attempt share is a possession proxy, not measured puck-possession time or a performance grade. A single share does not account for role, opponent quality, sample size, team system, or score effects.
Common Questions
Should I round the result?
Keep the displayed decimal for comparison. Round count-based results only when reconstructing an actual whole-number stat line.
Can I compare different leagues or data providers?
You can, but definitions and recording practices can differ. Verify that both samples use the same statistic before drawing conclusions.
Does this result predict future performance?
No. It summarizes the entered sample and does not forecast future outcomes by itself.
