FIP Calculator

Name: FIP Calculator
Author: Jitendra Kumar

Calculate Fielding Independent Pitching from home runs, walks, hit-by-pitches, strikeouts, innings pitched, and a league-specific FIP constant.

Last Updated: May 2026

FIP

3.33

K/9

9.56

ERA - FIP

0.32

Result band

Great FIP

Pitching Inputs

Enter innings pitched in baseball notation. FIP constant is editable because it changes by league and season.

Home runs (HR)

Walks (BB)

Hit by pitch (HBP)

Strikeouts (K)

Innings pitched

Use 165.2 for 165 and 2/3 innings.

FIP constant

Often near 3.10, but season-specific.

ERA

Target FIP

Future innings

Future HR

Future BB

Future HBP

Future K

Calculation Details

Step	Calculation	Result
FIP numerator	(13 x 18) + (3 x 52) - (2 x 176)	38.00
Innings conversion	165.2 IP	497 outs = 165.667 decimal innings
FIP formula	38.00 / 165.667 + 3.10	3.33
ERA comparison	3.65 ERA - 3.33 FIP	0.32

Component Rates

Rate	Calculation	Result
Home runs per 9	18 HR / 165.667 IP x 9	0.98
BB + HBP per 9	52 BB/HBP / 165.667 IP x 9	2.82
Strikeouts per 9	176 K / 165.667 IP x 9	9.56

Target Planning

Scenario	Assumption	Result
Projected FIP	25 future IP with entered future events	3.27
Target 3.50 FIP	Given entered future HR, BB, and HBP	6 future K needed
If future HR/BB/HBP are zero	28 future K over 25 IP	3.01

Baseball Statistics Notice

This calculator is for education, scorekeeping, and planning. FIP constants vary by season and league, and FIP is one lens on pitcher performance rather than a complete evaluation.

Reviewed For Methodology, Labels, And Sources

Every CalculatorWallah calculator is published with visible update labeling, linked source references, and founder-led review of formula clarity on trust-sensitive topics. Use results as planning support, then verify institution-, policy-, or jurisdiction-specific rules where they apply.

Reviewed By

Jitendra Kumar, Founder & Editorial Standards Lead, oversees methodology standards and trust-sensitive publishing decisions.

Review editor profile

Topic Ownership

Sales tax and tax-sensitive estimate tools, Education and GPA planning calculators, Health, protein, and screening-formula pages, Platform-wide publishing standards and methodology

See ownership standards

Methodology & Updates

Page updated May 2026. Trust-critical pages are reviewed when official rates or rules change. Evergreen calculator guides are checked on a recurring quarterly or annual cycle depending on topic volatility.

Sources & methodology About the review process

How to Use the FIP Calculator

Enter home runs, walks, hit-by-pitches, strikeouts, and innings pitched. Use baseball innings notation, where .1 means one out and .2 means two outs.

Enter the FIP constant for your league and season when you have it. Add ERA if you want an ERA-FIP comparison, and add future event assumptions for target planning.

Step 1: Enter pitcher events
Add home runs, walks, hit-by-pitches, and strikeouts.
Step 2: Enter innings pitched
Use baseball notation such as 120.0, 120.1, or 120.2.
Step 3: Set the FIP constant
Use a season-specific value when available, or keep the estimate for quick work.
Step 4: Review FIP and rates
Compare FIP with K/9, HR/9, BB+HBP/9, ERA gap, and target scenarios.

How This FIP Calculator Works

FIP focuses on the pitching events most separated from team defense: home runs, walks, hit-by-pitches, and strikeouts. Home runs and free runners increase the numerator; strikeouts reduce it.

The calculator converts baseball innings notation into decimal innings before applying the formula. That matters because 165.2 IP means 165 innings and two outs, or 165.667 decimal innings.

The FIP constant is added at the end so the number sits on an ERA-like scale. Because the run environment changes, exact constants should match the league and season being analyzed.

Fielding Independent Pitching Guide

Core Formulas

Metric	Formula	Use
FIP	((13 x HR) + (3 x (BB + HBP)) - (2 x K)) / IP + constant	Standard Fielding Independent Pitching formula.
FIP constant	league ERA - league raw FIP	Used to place FIP on an ERA-like scale.
K/9	strikeouts / innings pitched x 9	Supporting strikeout rate.
HR/9	home runs / innings pitched x 9	Supporting home-run rate.
BB + HBP/9	(walks + hit-by-pitches) / innings pitched x 9	Supporting free-runner rate.

FIP Inputs

Input	Meaning	Notes
IP	Innings pitched	Use baseball notation such as 6.0, 6.1, or 6.2.
HR	Home runs allowed	Weighted heavily because home runs are direct run damage.
BB	Walks	Combined with hit-by-pitches in the formula.
HBP	Hit by pitch	Treated like walks in standard FIP.
K	Strikeouts	Lower the FIP numerator because they prevent balls in play.
C	FIP constant	Season and league adjustment that puts FIP near ERA scale.

FIP Context

FIP is especially useful next to ERA. If a pitcher has a much lower FIP than ERA, the pitcher may have allowed poor results on balls in play or poor sequencing that FIP does not directly count. If FIP is much higher than ERA, home runs, walks, or low strikeout totals may be warning signs.

FIP is not a full defensive or run-prevention model. Pitchers can have repeatable traits that influence contact quality, batted-ball mix, and run prevention, so FIP is best used with ERA, WHIP, innings workload, park context, and scouting information.

Keep the research moving with ERA Calculator, Fielding Percentage Calculator, Batting Average Calculator, and Statistics Calculator.

Frequently Asked Questions

Use ((13 x home runs) + (3 x (walks + hit-by-pitches)) - (2 x strikeouts)) divided by innings pitched, then add the FIP constant.

FIP estimates pitching performance using events pitchers are generally considered to control most directly: strikeouts, walks, hit-by-pitches, and home runs.

The constant places FIP on an ERA-like scale. It changes by league and season because it is based on league run environment.

Use the constant for the league and season you are analyzing when available. For quick estimates, a value near 3.10 is commonly used, but exact historical constants vary.

Yes. Like ERA, a lower FIP is generally better because it estimates fewer runs allowed from defense-independent pitching events.

A gap between ERA and FIP can highlight cases where defense, sequencing, ballpark, scoring decisions, or batted-ball results may be affecting run prevention beyond the FIP events.