Batting Park Factor, also simply calledPark Factor orBPF, is abaseball statistic that indicates the difference betweenruns scored in a team's home and road games. Most commonly used as a metric in thesabermetric community, it has found more general usage in recent years. It is helpful in assessing how much a specificballpark contributes to the offensive production of a team or player.

The formula^[1] most commonly used is:

${\displaystyle PF=100\ast (\frac{\frac{homeRS+homeRA}{homeG}}{\frac{roadRS+roadRA}{roadG}})}$

In thisformula, all runs scored by or against a team at home (per game) are divided by all runs scored on the road (per game). Parks with a Park Factor over 100 are those where more overall runs are scored when the team is at home than are scored when the team is away. While some variation can be attributable to fluctuations in offensive^[2] and defensive performance, PF accounts for the production of both teams in each park and, correspondingly, is very useful in trying to determine which ballparks are "hitter friendly" and which are "pitcher friendly".

In place of Runs scored and allowed, the formula can easily usehome runs,hits or any other statistic to further analyze the park factor of an individual park.

• Glossary of baseball (H) § hitter's park
• Glossary of baseball (P) § pitcher's park

• Park Factors for all MLB Parks on MLB.com - Updated Daily

• Baseball statistics

• Articles with short description
• Short description matches Wikidata