GlossaryAt the table

PFR

Preflop raise: the share of hands a player raises before the flop.

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What it means
PFR counts the hands a player opens or re-raises before the flop. Every raise is also voluntary, so PFR is never higher than VPIP.
How it is calculated
PFR = hands raised preflop ÷ hands dealt. The gap between VPIP and PFR is how often the player just calls before the flop.
Worked example
A VPIP of 26% with a PFR of 16% means the player raises 16 hands in 100 and flat-calls another 10.
Why it matters
A PFR close to VPIP marks an aggressive player who takes the initiative. A wide gap marks a caller, whose flats are capped and easy to pressure.

See also: VPIP, Aggression factor, 3-bet