FIP (Fielding Independent Pitching) Calculator

Last Updated: Oct 19, 2025

Created by

Saqib Hanif

Saqib Hanif is the CEO and founder of Calculator Value. He builds calculators and educational content across sports, math, and science, and supports a limited set of construction-related calculators. Read full profile

Fielding Independent Pitching (FIP) estimates a pitcher's run prevention based on outcomes they control most: strikeouts, walks, hit batters, and home runs.

Formula

FIP = ((13 × HR + 3 × (BB + HBP) − 2 × K) / IP) + C

K: Strikeouts
BB: Walks
HBP: Hit by pitch
HR: Home runs
IP: Innings pitched (baseball notation: .1 = 1/3, .2 = 2/3)
C: League constant (default 3.10) to align FIP with typical ERA scales

Bidirectional Use

Enter K, BB, HBP, HR, and IP to compute FIP.
Enter FIP and all but one of those stats to back-solve the missing value (rounding to whole numbers for counts).

Example

K = 100, BB = 40, HBP = 5, HR = 20, IP = 180, C = 3.10:
D = 13×20 + 3×(40+5) - 2×100 = 260 + 135 - 200 = 195
FIP = 195/180 + 3.10 ≈ 4.18

This calculator uses exact decimal handling for IP baseball notation by mapping .1 to 1/3 and .2 to 2/3.

Industry-Standard Formulas: The formulas and methods used in this calculator follow widely accepted standards in Sports.
Careful Verification: The calculator is tested to ensure it behaves correctly across a range of inputs.
Continuous Updates: The calculator is updated as needed to reflect better accuracy and usability.

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Save Percentage→Winning Percentage→Rowing Split→Slugging Percentage→

Wondering how to calculate the true performance of a pitcher? Then you’ve come to the right place. ERA does not tell the whole story, so Fielding Independent Pitching (FIP) helps you see how good or bad a pitcher truly is — without counting help or mistakes from the defense.

We built the Fielding Independent Pitching Calculator to measure how well a pitcher performs based only on things they can control. A pitcher can control strikeouts, walks, home runs, and hit-by-pitches — not the defense or defensive luck.

In this guide we cover:

What Is Fielding Independent Pitching (FIP)?
What Is the Fielding Independent Pitching Calculator?
The FIP formula
Real-world examples
What is a good FIP?

What Is Fielding Independent Pitching (FIP)?

Fielding Independent Pitching (FIP) is a statistic that measures a pitcher’s performance based solely on what the pitcher controls — not on fielding. It uses outcomes like:

Strikeouts (K)
Walks (BB)
Hit by pitch (HBP)
Home runs allowed (HR)

Remember: ERA (Earned Run Average) shows how many runs a pitcher allows — including the effects of the defense — while FIP shows how well the pitcher performed independent of defensive help or mistakes.

What Is the Fielding Independent Pitching Calculator?

An FIP calculator is an online tool designed to measure a pitcher’s true performance solely from outcomes they control. Enter the following fields to compute FIP:

Innings Pitched (IP)
Strikeouts (K)
Walks (BB)
Home Runs (HR)
(Optional) Hit By Pitch (HBP)
(Optional) League Constant (C) — usually around 3.10

This tool is great for analysts, coaches, or fans curious why one pitcher’s numbers are better than another’s.

Fielding Independent Pitching Formula

Are you curious how exactly Fielding Independent Pitching is calculated, and how strikeouts, walks, and home runs combine into a FIP? Let's see the formula:

$FIP = \frac{(13 \times H R) + (3 \times (B B + H B P)) - (2 \times K)}{I P} + C$

Where:

HR = Home runs allowed
BB = Walks
HBP = Hit by pitches
K = Strikeouts
IP = Innings pitched
C = League constant (usually 3.10)

Now see a real world example that will use the formula to compute the values to get a FIP.

⚾ Real-World Fielding Independent Pitching Example

Suppose a pitcher has these stats:

Innings Pitched (IP): 90
Strikeouts (K): 80
Walks (BB): 25
Home Runs (HR): 12
Hit by Pitch (HBP): 2
League Constant (C): 3.10

Now apply the formula to compute FIP:

$FIP = \frac{(13 \times H R) + (3 \times (B B + H B P)) - (2 \times K)}{I P} + C$

$FIP = \frac{(13 \times 12) + (3 \times (25 + 2)) - (2 \times 80)}{90} + 3.10$

$FIP = \frac{156 + 81 - 160}{90} + 3.10$

$FIP = \frac{77}{90} + 3.10$

$FIP = 0.86 + 3.10 = 3.96$

So, the pitcher’s FIP is 3.96, which is considered a solid league-average performance.

What Is a Good Fielding Independent Pitching (FIP)?

Curious to see a table that breaks down pitcher quality based on FIP values:

FIP Range	Pitching Quality	Description
Below 3.00	Excellent	Cy Young-level dominance
3.00 – 3.50	Above Average	Strong control and strikeouts
3.50 – 4.00	Average	Typical MLB starter
4.00 – 4.50	Below Average	Some control or HR issues
Above 4.50	Poor	Needs improvement

Frequently Asked Questions

What’s the difference between FIP and ERA?

ERA (Earned Run Average) counts all earned runs, including those affected by poor fielding. FIP only considers outcomes that a pitcher can control, independent of fielding.