On-Base Percentage Calculator
On-base percentage shows how often a batter reaches base, by a hit, a walk or being hit by a pitch. It counts those routes, and batting average does not count walks at all.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
Add up the hits, walks and times hit by a pitch. Divide that by at bats, plus walks, plus times hit by a pitch, plus sacrifice flies.
Sacrifice flies go into the bottom figure but not the top, because a sacrifice is not an at bat and does not put the batter on base.
Worked example
A batter with 150 hits, 60 walks and 5 times hit by a pitch, over 540 at bats and 4 sacrifice flies, has an on-base percentage of 0.353.
Questions
Why is it higher than batting average?
It counts walks and times hit by a pitch, which are ways to reach base that batting average leaves out.
What is a sacrifice fly?
A fly ball caught for an out that lets a runner score. It counts in the bottom figure here, but it is not an at bat.
Which figure matters more?
Each shows something different. On-base percentage gives a fuller picture of reaching base, while batting average looks only at hits.
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