Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Feet to Inches
Convert ft to in instantly, then review the formula, assumptions, and rounding guidance.
Length & distanceInstant result
Decimals
Formula result = input × 0.3048 ÷ 0.0254. 1 ft = 12 in
Common examples
One value, several units
Metres0.3048 m
Kilometres0.0003 km
Centimetres30.48 cm
Millimetres304.8 mm
Miles0.0002 mi
Yards0.3333 yd
Inches12 in
Nautical miles0.0002 nmi
Conversion table
| ft | in |
|---|---|
| 1 ft | 12 in |
| 2 ft | 24 in |
| 5 ft | 60 in |
| 10 ft | 120 in |
| 25 ft | 300 in |
| 50 ft | 600 in |
| 100 ft | 1,200 in |
Conversion chart
1 ft12 in
5 ft60 in
10 ft120 in
25 ft300 in
50 ft600 in
Worked example
1 metre equals 3.28084 feet.
Unit definition
Feet (ft) One feet equals 0.3048 metre.
Unit history
The international foot was standardized in 1959 as exactly 0.3048 metre.
Step by step
1. Parse the value, including fractions.
2. Convert ft to metre.
3. Convert the base value to in and apply your display precision.
Understand the result before using it
Feet to Inches converts a value measured in Feet (ft) into the equivalent value in Inches (in). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 0.3048 ÷ 0.0254
Assumptions
- Feet and Inches represent the same length & distance quantity.
- The input is expressed in ft; the output is expressed in in.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 ft = 12 in. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a ft measurement in a document that expects in.
- Compare a feet value with a value reported in inches.
- Check the ft-to-in arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse ft with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Feet to Inches?
result = input × 0.3048 ÷ 0.0254 Using the displayed relationship, 1 ft equals 12 in.
How many Inches are in one Feet?
One Feet is 12 Inches. The displayed digits may be rounded.
Can I reverse the ft to in conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts in back to ft.
Is the Feet to Inches result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.