# Feet and Inches Calculator

> Add, subtract, multiply, or divide measurements expressed in feet and inches.

Page: https://askcalculators.com/calculator/feet-and-inches-calculator/
Definition: https://askcalculators.com/calculator/feet-and-inches-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/feet-and-inches-calculator/schema.json
Version: 1.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/feet-and-inches-calculator/?operation=add&feetA=5&inchesA=8&feetB=2&inchesB=6&factor=2

## Inputs
- operation: Operation; type=select; required; default=add; values=add|subtract|multiply|divide
- feetA: First feet; type=number; required; default=5
- inchesA: First inches; type=number; required; default=8
- feetB: Second feet; type=number; required; default=2
- inchesB: Second inches; type=number; required; default=6
- factor: Factor; type=number; required; default=2; min=0.000001

## Outputs
- measurement: Result in feet and inches; format=text; primary
- decimalFeet: Decimal feet; format=number
- totalInches: Total inches; format=number

## Formula
total inches = feet × 12 + inches; arithmetic is performed on total inches

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.