Feet to Inches Calculator - Convert Feet to Inches & Inches to Feet
Free feet to inches calculator. Convert feet to inches and inches to feet instantly. Bidirectional conversion with real-time results. Simple formula: 1 foot = 12 inches exactly. Perfect for construction, carpentry, and everyday measurements.
Last updated: January 23, 2026
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💡 Bidirectional Conversion
Enter either feet or inches, and the other value will be calculated automatically. You can convert both ways!
Conversion Facts:
- • 1 foot = 12 inches (exact conversion)
- • To convert feet to inches: multiply by 12
- • To convert inches to feet: divide by 12
- • Enter either feet or inches to calculate the other
- • This is a simple, exact conversion with no rounding needed
- • Commonly used in construction, carpentry, and everyday measurements
Feet to Inches Calculator Features
Directions
Feet → Inches ↔ Inches → Feet
Enter either feet or inches, and the other value is calculated automatically
Formula
1 ft = 12 in (exact)
Simple multiplication/division with no approximation needed
Speed
Instant calculations
See results immediately as you enter values
Formulas
inches = ft × 12
feet = in ÷ 12
Each calculation shows the formula used for transparency
Use cases
Building, Carpentry, DIY
Essential for construction measurements, carpentry projects, and DIY home improvements
Ease
Just enter and convert
No tricky formulas or exceptions - just simple multiplication or division
Quick Example Result
For 5 feet:
Feet
5 ft
Inches
60 in
How Our Feet to Inches Calculator Works
Our feet to inches calculator performs bidirectional conversions between feet and inches. The conversion is simple and exact: 1 foot equals exactly 12 inches. You can enter either feet or inches, and the calculator will automatically compute the other value in real-time.
How to Use the Calculator
Step 1: Enter Value
Enter either feet or inches in the corresponding field. You can convert both ways - enter feet to get inches, or enter inches to get feet.
Step 2: View Results
Results appear instantly with the conversion formula displayed. The calculator shows both the result and the calculation method used.
Step 3: Use Results
Use the converted value for your measurements, calculations, or projects. The conversion is exact with no rounding needed.
How to Convert Feet to Inches
Converting feet to inches is straightforward: multiply the number of feet by 12.
Formula
inches = feet × 12This is an exact conversion - no rounding or approximation needed.
Quick Examples
How to Convert Inches to Feet
Converting inches to feet is the reverse: divide the number of inches by 12.
Formula
feet = inches ÷ 12The result can be expressed as a decimal or mixed number.
Quick Examples
Why Inches and Feet Are Called That?
The names "inch" and "foot" have interesting historical origins:
Foot
The "foot" comes from exactly what you'd think — someone's actual foot. In ancient times, people used body parts as rough measurements, so a foot was literally based on the length of a human foot. Over time, this was standardized to 12 inches to make measurements more consistent across different regions.
Inch
The word "inch" is believed to come from the Latin word "uncia," which meant one-twelfth of something. In this case, one-twelfth of a foot. That's where the 12-inch rule comes from — the inch was originally defined as 1/12 of a foot, creating a convenient division system.
Imperial vs Metric System
While most of the world has moved to the metric system, the United States still uses feet and inches for everyday measurements like height, building materials, furniture, and construction. The imperial system (feet and inches) is based on 12s, which makes it easy to divide into halves, thirds, and quarters.
Imperial System (US)
- • 1 foot = 12 inches
- • 1 yard = 3 feet = 36 inches
- • 1 mile = 5,280 feet
- • Based on 12s for easy division
- • Still used in US for everyday measurements
Metric System
- • 1 meter = 100 centimeters
- • 1 meter = 1,000 millimeters
- • 1 kilometer = 1,000 meters
- • Based on 10s for decimal calculations
- • Used worldwide except US
Practical Applications
This calculator is essential for various real-world applications:
Construction & Building
Convert measurements for building materials, room dimensions, and project specifications. Essential for framing, flooring, and general construction work.
Carpentry & Woodworking
Measure and cut wood accurately, calculate board lengths, and determine material requirements for furniture and cabinetry projects.
Home Improvement
Calculate dimensions for furniture placement, wall measurements, and material quantities for DIY projects. Perfect for planning renovations and improvements.
Everyday Measurements
Convert height measurements, room sizes, and object dimensions. Useful for understanding measurements in everyday life, especially in the United States where imperial units are common.
Need other conversion tools? Check out our feet and inches calculator and inches to fraction calculator.
Get Custom Calculator for Your PlatformFeet to Inches Calculator Examples
Input:
- Feet: 5 ft
Calculation:
- Formula: inches = feet × 12
- inches = 5 × 12
- inches = 60
Result: 5 feet = 60 inches
This is a common conversion for height measurements (5 feet tall).
Input:
- Inches: 36 in
Calculation:
- Formula: feet = inches ÷ 12
- feet = 36 ÷ 12
- feet = 3
Result: 36 inches = 3 feet (1 yard)
This is useful to know since 36 inches equals 1 yard in the imperial system.
Input:
- Feet: 10 ft
Calculation:
- Formula: inches = feet × 12
- inches = 10 × 12
- inches = 120
Result: 10 feet = 120 inches
This is a common measurement in construction and building projects.
2 Feet
2 ft =
24 inches
18 Inches
18 in =
1.5 feet
100 Inches
100 in =
8.33 feet
Frequently Asked Questions
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