Square Foot Calculator Feet and Inches
Calculate square footage using feet and inches. Enter dimensions as feet + inches and get the area in square feet automatically.
Feet and Inches Calculator
Enter length and width as feet + inches. The calculator converts and computes the area in square feet.
Length
Width
How to Calculate Square Footage Using Feet and Inches
Many tape measures display measurements in feet and inches (e.g., 12 ft 6 in). To calculate square footage, first convert the inches portion to a decimal fraction of a foot.
Conversion Method
For example, 12 feet 6 inches = 12 + (6 ÷ 12) = 12.5 feet.
Step-by-Step
- Read the tape measure — note the feet and remaining inches separately.
- Convert inches to decimal feet — divide inches by 12.
- Add to the feet value for the total measurement in feet.
- Multiply length × width (both in decimal feet) for square footage.
Example
Length: 15 ft 8 in = 15 + (8 ÷ 12) = 15.667 ft
Width: 11 ft 4 in = 11 + (4 ÷ 12) = 11.333 ft
15.667 × 11.333 = 177.56 square feet
Common Inch-to-Feet Conversions
| Inches | Decimal Feet |
|---|---|
| 3 inches | 0.25 ft |
| 6 inches | 0.5 ft |
| 9 inches | 0.75 ft |
| 1 inch | 0.0833 ft |
Frequently Asked Questions
How do I convert feet and inches to square feet? +
Convert inches to decimal feet by dividing by 12 (e.g., 6 inches = 0.5 ft), add to the feet value, then multiply length × width.
How many inches are in a foot? +
There are 12 inches in 1 foot. To convert inches to feet, divide by 12.
What is 12 feet 6 inches in decimal feet? +
12 + (6÷12) = 12 + 0.5 = 12.5 feet.
How do I read a tape measure for square footage? +
Read the foot marks and remaining inches. Convert to decimal feet using our calculator, then multiply length × width.