Skip to content
All terms
MLBHitting

On-Base Percentage (OBP)

How often a batter reaches base via hit, walk, or hit-by-pitch.

Full Definition

On-Base Percentage (OBP) measures how frequently a batter reaches base, including hits, walks (BB), and hit-by-pitches (HBP). The formula is (H + BB + HBP) / (AB + BB + HBP + SF). OBP is considered more valuable than batting average because it accounts for walks, which are just as valuable as singles for getting on base. High-OBP hitters at the top of the lineup create more run-scoring opportunities.

What's a good On-Base Percentage?

Above .370 is elite, .340-.370 is great, .310-.340 is average, below .300 is poor.

See it in action

Hitter vs Pitcher DashboardTrack On-Base Percentage and more — updated daily, free to use.

Learn more

Read our in-depth guide

Related terms

Batting Average (AVG)

Hits divided by at-bats. Measures how often a batter gets a hit.

OPS (On-Base Plus Slugging)

OBP plus SLG. The most popular single-number measure of overall offensive value.

Slugging Percentage (SLG)

Total bases divided by at-bats. Measures power output per at-bat.

Put this stat to work

HeatCheck HQ gives you On-Base Percentage and dozens more stats across every MLB game — free to use, updated daily.

Sign Up Free