Feet and Inches Calculator – Inches Calculator & Add Feet and Inches Calculator
An inches calculator (or feet and inches calculator, inches and feet calculator, inch feet calculator) helps you add feet and inches, subtract feet and inches, multiply feet and inches, and divide feet and inches. Use this add feet and inches calculator to learn how to add inches and how to add feet and inches. This feet and inches calculator also functions as an area feet and inches calculator for construction and carpentry projects.
Last updated: January 23, 2026
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You can enter:
- Fractions: 1/4, 5/8, 1/2, 5/16
- Mixed numbers: 1+1/2, 5+3/8, 4+5/16
- Decimals: 2.5, 3.75
- Whole numbers: 5, 10
Calculation Result
Result
7 ft 9 in
Total: 93.0000 inches
Tips:
- • 12 inches = 1 foot (exact)
- • For addition/subtraction: feet and inches are calculated separately
- • For multiplication: result is in square feet and square inches
- • For division: result is unitless (ft ÷ ft = 1)
- • Fractions are automatically converted and simplified
- • Inches exceeding 12 are automatically converted to feet
Feet and Inches Calculator Features
Operations
➕ ➖ ✖️ ➗
Perform addition, subtraction, multiplication, and division with feet and inches
Formats
Fractions, Mixed Numbers, Decimals
Supports 1/4, 1/2, 5/8, 1+1/2, 5+3/8, and decimal inputs
Features
Inches to Feet, Fraction Simplification
Automatically converts inches to feet when they exceed 12 and simplifies fractions
Multiplication
ft² and in² Results
Multiplying feet and inches gives results in both square feet and square inches
Speed
Instant calculations
See results immediately as you enter values or change operations
Use cases
Building, Carpentry, DIY
Essential for construction measurements, carpentry projects, and DIY home improvements
Quick Example Result
For 2 ft 3 in + 5 ft 6 in:
Result
7 ft 9 in
Total Inches
93 in
Inches Calculator & Feet and Inches Calculator
An inches calculator (or inches calculator) performs arithmetic operations on measurements in inches and feet. This feet and inches calculator (or inches and feet calculator, inch feet calculator, feet inch calculator) can add, subtract, multiply, and divide feet and inches. Also known as calculator inches, calculator in inches, calculator for ft and inches, calculator foot, in feet calculator, feet calculator, calculating feet, calculating feet and inches, ft in calculator, inches feet calculator, or inch foot calculator. Perfect for construction, carpentry, and measurement calculations.
Add Feet and Inches Calculator & How to Add Inches
An add feet and inches calculator (or add feet and inches calculator, feet inches addition calculator) helps you add feet and inches. To learn how to add inches (or how to add feet and inches): 1) Add feet and inches separately. 2) If inches exceed 12, convert to feet (12 inches = 1 foot). Example: 2 ft 3 in + 5 ft 6 in = 7 ft 9 in. Also known as add inches calculator, add inches, adding inches, add feet inches, adding inches and feet, addition of feet and inches, or adding fractional inches. This add feet and inches calculator automates the process.
Subtract Feet and Inches & Multiply Feet and Inches
To subtract feet and inches (or how to subtract feet and inches): subtract feet and inches separately, borrowing 1 foot (12 inches) if needed. Example: 5 ft 3 in - 2 ft 8 in = 2 ft 7 in. To multiply feet and inches (or how to multiply feet and inches, how to multiply inches, feet inches multiplication): convert to total inches, multiply, then convert to square feet and square inches. Example: 4 ft × 2 ft = 8 ft². Also known as multiplying measurements or feet and inch multiplier.
Area Feet and Inches Calculator & Divide Feet and Inches
An area feet and inches calculator (or area calculator feet and inches) calculates area by multiplying length and width in feet and inches. Result shows in both square feet (ft²) and square inches (in²). To divide feet and inches: convert to total inches, divide, result is unitless. Example: 10 ft ÷ 5 ft = 2, or 3.75 inches divided by 2 = 1.875 inches, or 12 inches divided by 10 = 1.2 inches. Also supports 5 ft divided by 3, 8 feet divided by 3, 10 feet divided by 3, and other division operations. Perfect for feet math and measurement addition calculator needs.
How Our Feet and Inches Calculator Works
Our feet and inches calculator performs arithmetic operations on measurements in feet and inches. It supports various input formats including whole numbers, decimals, fractions (1/4, 1/2, 5/8), and mixed numbers (1+1/2, 5+3/8). The calculator converts all inputs to total inches, performs the operation, then converts the result back to feet and inches format.
How to Use the Calculator
Step 1: Enter First Measurement
Enter feet and inches in the first set of fields. You can use whole numbers, decimals, fractions (1/4, 5/8), or mixed numbers (1+1/2, 5+3/8).
Step 2: Select Operation
Choose from Add (➕), Subtract (➖), Multiply (✖️), or Divide (➗) from the dropdown.
Step 3: Enter Second Measurement
Enter the second measurement in feet and inches using the same flexible format.
Step 4: View Results
Results appear instantly. For addition/subtraction, see feet and inches. For multiplication, see square feet and square inches. For division, see a unitless decimal result.
How to Add Feet and Inches
Adding feet and inches is straightforward: add feet and inches separately, then convert any inches exceeding 12 to feet.
Simple Example
Add 2 ft 3 in + 5 ft 6 in:
Feet: 2 + 5 = 7 ftInches: 3 + 6 = 9 inResult: 7 ft 9 inExample with Fractions
Add 2 ft 10¼ in + 1 ft 2⁹/₁₆ in:
Feet: 2 + 1 = 3 ftInches: 10¼ + 2⁹/₁₆ = 12 + 13/16 in12 in = 1 ft, so: 3 + 1 = 4 ftResult: 4 ft 13/16 inHow to Subtract Feet and Inches
Subtracting feet and inches requires borrowing when the second measurement's inches are greater than the first. Borrow 1 foot (12 inches) from the feet column.
Example with Borrowing
Subtract 5 ft 3 in - 2 ft 8 in:
3 in < 8 in, so borrow 1 ft (12 in)5 ft 3 in = 4 ft 15 inFeet: 4 - 2 = 2 ftInches: 15 - 8 = 7 inResult: 2 ft 7 inHow to Multiply Feet and Inches
Multiplying feet and inches gives you area measurements. Convert both measurements to total inches, multiply, then convert the result to square feet and square inches.
Area Calculation Example
Multiply 4 ft 3/8 in × 2 ft:
4 ft = 48 in, 3/8 in = 0.375 inTotal: 48.375 in2 ft = 24 in48.375 × 24 = 1,161 in²1,161 ÷ 144 = 8.06 ft²Result: 8.06 ft² or 1,161 in²How to Divide Feet and Inches
Dividing feet by feet (or inches by inches) results in a unitless number. This represents how many times the second measurement fits into the first.
Division Example
Divide 10 ft ÷ 5 ft:
10 ft ÷ 5 ft = 2Result: 2 (unitless - the units cancel)This means 5 feet fits into 10 feet exactly 2 times.
Area Calculator - Feet and Inches
You can use our feet and inches calculator as an area calculator by selecting the multiply operation. Enter length and width in feet and inches, and the result will be shown in both square feet and square inches.
Area Calculation Example
Calculate area of a room: 2 ft 6 in × 1 ft 5 in
2 ft 6 in = 30 in1 ft 5 in = 17 in30 × 17 = 510 in²510 ÷ 144 = 3.54 ft²Result: 3.54 ft² or 510 in²Practical Applications
This calculator is essential for various real-world applications:
Construction & Building
Calculate material lengths, room dimensions, and project measurements. 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 flooring area, wall dimensions, and material quantities for DIY projects. Perfect for planning renovations and improvements.
Education & Learning
Help students understand imperial measurements, fraction operations, and unit conversions. Great for teaching practical math skills.
Need other conversion tools? Check out our feet to inches calculator and inches to fraction calculator.
Get Custom Calculator for Your PlatformFeet and Inches Calculator Examples
Input:
- First: 2 ft 3 in
- Operation: Add (➕)
- Second: 5 ft 6 in
Calculation Steps:
- Add feet separately: 2 + 5 = 7 ft
- Add inches separately: 3 + 6 = 9 in
- Since 9 < 12, no conversion needed
- Result: 7 ft 9 in
Result: 2 ft 3 in + 5 ft 6 in = 7 ft 9 in
Total: 93 inches (7 × 12 + 9 = 93)
Input:
- First: 2 ft 10¼ in
- Operation: Add (➕)
- Second: 1 ft 2⁹/₁₆ in
Calculation Steps:
- Add feet: 2 + 1 = 3 ft
- Add inches: 10¼ + 2⁹/₁₆
- Find common denominator: 16
- 10¼ = 10⁴/₁₆, 2⁹/₁₆ = 2⁹/₁₆
- 10⁴/₁₆ + 2⁹/₁₆ = 12¹³/₁₆ in
- 12 in = 1 ft, so: 3 + 1 = 4 ft
- Result: 4 ft 13/16 in
Result: 2 ft 10¼ in + 1 ft 2⁹/₁₆ in = 4 ft 13/16 in
The calculator automatically handles fraction addition and unit conversion.
Input:
- Length: 4 ft 3/8 in
- Operation: Multiply (✖️)
- Width: 2 ft
Calculation Steps:
- Convert to inches: 4 ft = 48 in, 3/8 in = 0.375 in
- Total: 48.375 in
- 2 ft = 24 in
- Multiply: 48.375 × 24 = 1,161 in²
- Convert to square feet: 1,161 ÷ 144 = 8.06 ft²
Result: 4 ft 3/8 in × 2 ft = 8.06 ft² or 1,161 in²
The calculator shows results in both square feet and square inches for area calculations.
Subtraction
5 ft 3 in - 2 ft 8 in =
2 ft 7 in
Division
10 ft ÷ 5 ft =
2 (unitless)
Area
2 ft 6 in × 1 ft 5 in =
3.54 ft²
Frequently Asked Questions
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