Hockey Corsi & Fenwick Calculator

This calculator computes two possession metrics used in modern hockey analytics: Corsi and Fenwick. Corsi For/Against sums every shot attempt directed at net — shots on goal, shots blocked by the opposing team's skaters, and shots that missed the net entirely — for each side, and Corsi% is Corsi For divided by the combined total (Corsi For + Corsi Against), expressed as a percentage; the calculator defaults this to 50% if no shot attempts are entered at all, avoiding a divide-by-zero. Fenwick uses the same idea but deliberately excludes blocked shots, on the reasoning that shot-blocking is partly a skill (defensive positioning) rather than pure puck luck, so some analysts consider Fenwick a cleaner signal of underlying possession quality.

Both metrics are proxies for territorial and puck-possession dominance rather than actual goals: a team can post a strong Corsi% while still losing on the scoreboard due to shooting or goaltending variance, which is part of why these "process" stats are used alongside actual results rather than instead of them. Values above 50% indicate a team is generating more shot attempts than it allows; the calculator notes that elite NHL teams tend to run around 53%+ over a full season. Keep in mind these figures are typically calculated at 5-on-5, score- and venue-adjusted in professional analytics — this tool simply takes raw counts as given, so mixing in power-play or shorthanded shot attempts will skew the read on true possession balance.