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On-Base Percentage Calculator

On-base percentage (OBP) from hits, walks, hit-by-pitches and sacrifice flies.

HitsWalksHit by pitchAt-batsSacrifice flies

How it's calculated

OBP = (hits + walks + hit by pitch) ÷ (at-bats + walks + hit by pitch + sacrifice flies). Reaching on an error or a fielder's choice doesn't count as on base.

Example

150 hits, 60 walks and 5 HBP over 500 at-bats and 5 sac flies is 0.377.

OBP scale

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