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Square Foot Calculator with Inches

Free square foot calculator with inches to calculate area from measurements in feet and inches, plus instant conversions to square meters, yards, inches, and acres.

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Square Foot Calculator with Inches

inches
inches
Total Area
0
sq ft

All Square Foot Calculators

Choose a specialized calculator for your specific project type.

🏠
Room Calculator
Calculate the square footage of any room. Includes presets for bedrooms, kitchens, bathrooms, and more.
Calculate Room Area →
🪵
Flooring Calculator
Figure out how much flooring material you need, including a waste factor for hardwood, laminate, vinyl, or carpet.
Calculate Flooring →
🔲
Tile Calculator
Calculate area and the exact number of tiles needed based on tile size and grout gap spacing.
Calculate Tiles →
🪨
Concrete Calculator
Calculate the area and volume of concrete needed in cubic yards, with adjustable depth/thickness.
Calculate Concrete →
🧱
Wall Calculator
Measure wall area for painting, wallpaper, or siding. Supports multiple walls and door/window deductions.
Calculate Wall Area →
📐
Triangle Calculator
Calculate square footage for triangular spaces using base and height, with support for different triangle types.
Calculate Triangle →
🔷
Odd Shapes Calculator
Calculate area for irregular and L-shaped rooms by combining multiple rectangles, triangles, and circles.
Calculate Odd Shapes →
📏
Feet & Inches Calculator
Enter dimensions using separate feet and inches fields for precise measurements without decimal conversion.
Calculate with Inches →
🗺️
Map Calculator
Draw shapes on an interactive map to calculate the square footage of land, lots, and properties.
Calculate on Map →

Square Footage Calculator from Inches

Enter measurements in inches to calculate square footage. The calculator automatically converts inches to feet (by dividing by 12) before computing the area.

Area (ft²) = (Length in inches ÷ 12) × (Width in inches ÷ 12)

A tile backsplash 48 inches long and 18 inches wide: (48 ÷ 12) × (18 ÷ 12) = 4 × 1.5 = 6 sq ft. This calculator is ideal for tile, fabric, countertop, and small-space measurements where inches are more practical than feet.

Inches to Square Feet Reference

Dimensions (inches)Square Feet
12 × 12 in1 sq ft
24 × 24 in4 sq ft
36 × 36 in9 sq ft
48 × 72 in24 sq ft
60 × 96 in40 sq ft

How to Calculate Square Footage from Inch Measurements

  1. Measure in inches: Use a tape measure and record the length and width in inches.
  2. Enter inches directly: Type the values into the calculator — no mental conversion needed.
  3. Get square footage: The result is automatically displayed in sq ft, sq meters, and sq inches.
  4. Use for small areas: Tile sizes, countertops, shelves, and art spaces are easier to measure in inches.

Common Inch-to-Foot Conversions

InchesDecimal Feet
6 inches0.5 ft
9 inches0.75 ft
12 inches1 ft
18 inches1.5 ft
24 inches2 ft
36 inches3 ft

Frequently Asked Questions

Divide each measurement by 12 to convert to feet, then multiply. (48 in ÷ 12) × (36 in ÷ 12) = 4 × 3 = 12 sq ft. Or just enter inches directly in this calculator.

There are 144 square inches in one square foot (12 × 12 = 144).

Use our Feet & Inches Calculator for mixed feet and inches input. That calculator has separate fields for feet and inches so you don't need to convert.

Enter the tile dimensions in inches in this calculator to get the area per tile in sq ft. Then divide the total floor area by tile area, and add 10% for waste to find the number of tiles needed.

144 square inches = 1 square foot (since 12 × 12 = 144). Divide any sq in value by 144 to convert to sq ft.