Feet to Inches Converter
Enter the length in feet below to convert it to inches.
Convert Feet to Inches
Enter a value in feet (ft) to convert to inches (in).
Feet to Inches Conversion Chart (1–40 Continuous)
Continuous 1 to 40 feet lookup table with exact decimals and reduced nearest 1/64 fractions. Highlighted rows mark common shop and ruler values.
| Feet (ft) | Decimal (in) | Fraction — Nearest 1/64 (Reduced) | Nearest 1/16 (Tape) |
|---|---|---|---|
1 ft★ Common | 12 in | 12 in | 12 in |
2 ft★ Common | 24 in | 24 in | 24 in |
3 ft★ Common | 36 in | 36 in | 36 in |
4 ft | 48 in | 48 in | 48 in |
5 ft★ Common | 60 in | 60 in | 60 in |
6 ft★ Common | 72 in | 72 in | 72 in |
7 ft | 84 in | 84 in | 84 in |
8 ft★ Common | 96 in | 96 in | 96 in |
9 ft | 108 in | 108 in | 108 in |
10 ft★ Common | 120 in | 120 in | 120 in |
11 ft | 132 in | 132 in | 132 in |
12 ft★ Common | 144 in | 144 in | 144 in |
How to Convert Feet to Inches
To convert feet to 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.
For example, here's how to convert 6 feet to inches using the formula above.
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.
Our foot fraction and decimal calculator can convert feet and inches, and it 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.
How to Convert Feet to Fractional Inches (1/16″, 1/32″ & 1/64″)
Plain-language method for turning decimal inches into a standard tape-measure or machinist ruler fraction
Calculators give you a decimal number (such as 72 in), but tape measures and woodworking rulers are marked in binary fractions of an inch—most commonly 1/16″ on carpenter tapes, 1/32″ on fine woodworking rules, and 1/64″ on machinist scales.
Here is the step-by-step worked example for converting 6 feet (ft) into fractional inches:
- Find the decimal inches result: Convert 6 ft to inches to get 72 in.
- Separate the whole inches from the decimal part: Keep the whole number 72 aside, leaving the decimal remainder 0.
- Multiply the decimal part by your desired fraction denominator (16, 32, or 64) and round half up: Multiply 0 by 16, 32, or 64, then round to the nearest whole number (values ending in .5 round up).
- Reduce the fraction to lowest terms: If the rounded top number (numerator) is even, divide both top and bottom by 2 (or their Greatest Common Divisor) until the top number is odd, then combine with your whole inches.
What Is a Foot?
A foot is a US customary and imperial unit of length equal to 12 inches or 1/3 of a yard. Under the 1959 International Yard and Pound Agreement, one foot is legally defined as exactly 0.3048 meters (30.48 centimeters). [1]
Feet are widely used in the United States, Canada, and the United Kingdom for human height, building construction, real estate floor plans, and aviation altitude. Feet can be abbreviated as ft; for example, 1 foot can be written as 1 ft.
Feet can also be denoted using the ′ symbol, known as a prime (or a single quote ' for convenience). For example, 5 feet 10 inches is frequently written as 5′ 10″ or 5' 10".
Feet are measured using 12-inch rulers, carpenter's folding rules, 25-foot steel tape measures, and laser distance meters across residential framing, architecture, and surveying.
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 as exactly 0.9144 meters under the 1959 International Yard and Pound Agreement, one inch equals exactly 2.54 centimeters (25.4 millimeters or 25,400,000 nanometers). [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 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' to 35'. Other devices used to measure in inches include scales, calipers, measuring wheels, micrometers, yardsticks, and even lasers.
When converting length between feet (ft) and inches (in), keep full floating-point precision (1' = 12 in; 1 in = 0.0833333 ft) during intermediate calculations and round only the final inch figure to match your instrument tolerance.
More Foot & Inch Conversions
Need to calculate in the opposite direction? Use our inches to feet converter (in to ft) to switch your starting unit immediately. You can also explore related tools such as converting centimeters to inches, converting millimeters to inches, or converting feet to meters.
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Length Metrology Standard — Feet (ft) to Inches (in)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Foot (ft) & Inch (in)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (ft to in)