Feet to Inches Conversion Calculator

Enter the length in feet below to get the value converted to inches.

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1 ft = 12 in
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How to Convert Feet to Inches

conversion scale showing feet and equivalent inches length values

To convert a foot measurement to an inch measurement, multiply the length by the conversion ratio. One foot is equal to 12 inches, so use this simple formula to convert:

inches = feet × 12

The length in inches is equal to the feet multiplied by 12.

For example, here's how to convert 5 feet to inches using the formula above.
5' = (5 × 12) = 60"
infographic showing how to convert feet to inches

Our inch fraction calculator can add feet and inches together and it also automatically converts the results to US customary, imperial and SI metric values.

Feet and inches are both units used to measure length. Keep reading to learn more about each unit of measure.

Feet

The foot is a unit of linear length measure equal to 12 inches or 1/3 of a yard. Because the international yard is legally defined to be equal to exactly 0.9144 meters, one foot is equal to 0.3048 meters.[1]

The foot is a US customary and imperial unit of length. Feet can be abbreviated as ft, for example 1 foot can be written as 1 ft.

Feet can also be denoted using the symbol, otherwise know as a prime, though a single-quote (') is often used instead of the prime symbol for convenience. Using the prime, 1 ft can be written as 1′.

The foot is most commonly measured using either a standard 12" ruler or a tape measure, though there are many other measuring devices available.. Feet are sometimes referred to as linear feet, which is simply the value of a length in feet, learn more.

You might be interested in our feet and inches calculator, which can add feet with inches, centimeters, or meters.

Inches

An inch is a unit of linear length measure equal to 1/12 of a foot or 1/36 of a yard. Because the international yard is legally defined to be equal to exactly 0.9144 meters, one inch is equal to 2.54 centimeters.[2]

The inch is a US customary and imperial unit of length. Inches can be abbreviated as in, for example 1 inch can be written as 1 in.

Inches can also be denoted using the symbol, otherwise know as a double-prime. Often a double-quote (") is used instead of a double-prime for convenience. Using the double-prime, 1 in can be written as 1″.

A quarter is .955" in diameter, which is just smaller than 1"

The standard ruler has 12", and are a common measuring tool for measuring inches. They are also often measured using tape measures which commonly come in lengths from 6' - 35'. Other types of measuring devices include scales, calipers, measuring wheels, micrometers, yardsticks, and even lasers.

We recommend using a ruler or tape measure for measuring length, which can be found at a local retailer or home center. Rulers are available in imperial, metric, or combination with both values, so make sure you get the correct type for your needs.

If you need a ruler you can also download and print our free printable rulers, which include both imperial and metric measurements.

Foot Measurements and Equivalent Inch Conversions

Common foot values converted to the equivalent inch value
Feet Inches
1' 12"
2' 24"
3' 36"
4' 48"
5' 60"
6' 72"
7' 84"
8' 96"
9' 108"
10' 120"
11' 132"
12' 144"
13' 156"
14' 168"
15' 180"
16' 192"
17' 204"
18' 216"
19' 228"
20' 240"

References

  1. National Institute of Standards and Technology, U.S. Survey Foot: Revised Unit Conversion Factors, https://www.nist.gov/pml/us-surveyfoot/revised-unit-conversion-factors
  2. National Institute of Standards and Technology, Handbook 133 - 2019 Edition, https://www.nist.gov/sites/default/files/documents/2017/04/28/12-apde-gentab-11-hb133-final.pdf

More Foot Length Conversions

US Customary & Imperial Units
Convert to Miles
1' is equal to 0.000189 miles
Convert to Yards
1' is equal to 0.333333 yards
SI Units
Convert to Kilometers
1' is equal to 0.000305 kilometers
Convert to Meters
1' is equal to 0.3048 meters
Convert to Centimeters
1' is equal to 30.48 centimeters
Convert to Millimeters
1' is equal to 304.8 millimeters
Convert to Micrometers
1' is equal to 304,800 micrometers
Convert to Nanometers
1' is equal to 304,800,000 nanometers