Calculator Feet Inches

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Feet and Inches Calculator

Use this calculator to easily add or subtract measurements in feet and inches. Whether you're working on a DIY project, calculating material needs, or simply need to combine or find the difference between two lengths, this tool simplifies the process.

Add (+) Subtract (-)

Understanding Feet and Inches

The imperial system of measurement uses feet and inches for length. One foot is equivalent to 12 inches. This system is commonly used in the United States for various applications, including construction, interior design, and personal height measurements.

Why Use a Feet and Inches Calculator?

Working with feet and inches, especially when adding or subtracting, can sometimes be tricky due to the base-12 nature of inches within a foot. For example, if you need to add 5 feet 8 inches to 3 feet 7 inches, you can't simply add 8+7 to get 15 inches and then convert. You need to carry over the extra 12 inches as a foot.

  • Construction & DIY: Accurately calculate lengths for lumber, piping, fabric, or room dimensions.
  • Crafts & Hobbies: Determine total material needed for sewing, quilting, or other projects.
  • Home Improvement: Measure spaces for furniture, flooring, or wall coverings.
  • Avoiding Errors: Manual calculations can lead to mistakes, especially with conversions. This calculator ensures precision.

How to Use the Calculator

  1. Enter Measurement 1: Input the first length in feet and inches into the respective fields.
  2. Select Operation: Choose whether you want to add (+) or subtract (-) the second measurement.
  3. Enter Measurement 2: Input the second length in feet and inches.
  4. Click Calculate: The calculator will instantly display the combined or differential length in feet and inches, as well as the total equivalent in inches and feet for convenience.

Examples of Use

Let's look at some practical scenarios:

Example 1: Adding Lengths for a Project

You have two pieces of wood. One is 6 feet 9 inches long, and the other is 4 feet 5 inches long. You want to know their combined length if placed end-to-end.

  • Measurement 1: Feet = 6, Inches = 9
  • Operation: Add
  • Measurement 2: Feet = 4, Inches = 5
  • Result: 11 feet 2 inches (134 total inches, 11.17 total feet)

Example 2: Subtracting to Find a Difference

Your wall is 10 feet 3 inches high, and a bookshelf you want to buy is 6 feet 8 inches tall. You want to find out how much space will be left above the bookshelf.

  • Measurement 1: Feet = 10, Inches = 3
  • Operation: Subtract
  • Measurement 2: Feet = 6, Inches = 8
  • Result: 3 feet 7 inches (43 total inches, 3.58 total feet)

Example 3: Handling Larger Inch Values

Suppose you measure a length as 7 feet 15 inches. While typically inches are 0-11, the calculator can handle this by converting 15 inches to 1 foot 3 inches internally, making the total 8 feet 3 inches.

This calculator simplifies these conversions and calculations, providing accurate results quickly.

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