1. What is On-Base Percentage (OBP)?

On-Base Percentage (OBP) measures how frequently a batter reaches base. It's considered one of the most important offensive statistics in baseball, as it directly measures a player's ability to avoid making outs.

2. How Does the Calculator Work?

The calculator uses the standard OBP formula:

Where:

• Hits — All times the batter reaches at least first base
• Walks — Bases on balls (BB)
• Hit By Pitch (HBP) — When a pitch hits the batter
• At Bats (AB) — Official batting appearances
• Sacrifice Flies (SF) — Fly balls that result in a runner scoring

3. Importance of OBP

Details: OBP is crucial because it directly measures a player's ability to not make outs. In baseball, outs are the currency of the game - there are only 27 per team in a regulation game. Players who can avoid making outs while reaching base are extremely valuable.

4. Using the Calculator

Tips: Enter all required statistics from a player's performance. At Bats must be greater than zero for the calculation to work. The result will be displayed as a percentage.

5. Frequently Asked Questions (FAQ)

Q1: What is a good OBP in baseball?
A: In MLB, .340 is about average, .370 is very good, and .400+ is excellent. The league average typically ranges from .310 to .330.

Q2: Why are sacrifice flies included in the denominator?
A: Sacrifice flies count as plate appearances where the batter made an out, so they're included in the denominator but not the numerator.

Q3: Why aren't sacrifice bunts included?
A: Sacrifice bunts are not counted against OBP as they're considered a strategic out rather than a true offensive attempt.

Q4: How does OBP differ from batting average?
A: Batting average only considers hits per at bat, while OBP accounts for all ways a player can reach base (except errors and fielder's choice).

Q5: What's the highest single-season OBP in MLB history?
A: Barry Bonds holds the record with a .609 OBP in 2004. Ted Williams has the second highest at .553 in 1941.