Feet to Inches Conversion Calculator
Enter the length in feet below to get the value converted to inches.
Do you want to convert inches to feet?
How to Convert Feet to Inches
To convert a measurement in feet to a measurement in inches, multiply the length by the following conversion ratio: 12 inches/foot.
Since one foot is equal to 12 inches, you can use this simple formula to convert:
The length in inches is equal to the length in feet multiplied by 12.
How Many Inches Are in a Foot?
There are 12 inches in a foot, which is why we use this value in the formula above.
1' = 12"
Our inch fraction calculator can add feet and inches together, and it can also automatically convert 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.
What is a Foot?
The foot is a unit of length measurement 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.
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 known as a prime, though a single-quote (') is often used instead of the prime symbol for convenience. Using the prime symbol, 1 ft can be written as 1′.
Measurements in feet are most commonly taken 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 are simply a measurement of length in feet.
You might be interested in our feet and inches calculator, which can add feet with other units of measurement such as inches, centimeters, or meters.
Learn more about feet.
What is an Inch?
An inch is a unit of length 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.
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 known as a double-prime. Often a double-quote (") is used instead of a double-prime for convenience. A double-prime is commonly used to express 1 in as 1″.
The standard ruler is 12 inches long and is a common tool for measuring a length in inches. Another frequently used tool to perform measurements in inches is a tape measure, which commonly comes in lengths from 6' - 35'. Other types of devices used to make measurements in inches include scales, calipers, measuring wheels, micrometers, yardsticks, and even lasers.
Learn more about inches.
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 a combination of both values, so make sure you get the correct type for your needs.
Need a ruler? Try our free downloadable and printable rulers, which include both imperial and metric measurements.
Foot to Inch Conversion Table
- 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
- National Institute of Standards and Technology, Checking the Net Contents of Packaged Goods, Handbook 133 - 2019 Edition, https://nvlpubs.nist.gov/nistpubs/hb/2019/NIST.HB.133-2019.pdf