Convert between square inches (sq in) and square feet (sq ft) for area measurements in real estate, construction, home improvement, and craft projects with precise results.
Conversion Factor:
1 Square Foot (sq ft) = 144 Square Inches (sq in) | 1 sq in = 1/144 sq ft ≈ 0.006944 sq ft
sq ft = sq in ÷ 144 | sq in = sq ft × 144
Accepts decimal values (e.g., 288 sq in = 2 sq ft)
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Quick conversions - click to auto-fill:
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Common imperial units for measuring area, used primarily in the United States for various applications
Common objects and spaces with their approximate area in both units:
| Object/Space | Square Inches (sq in) | Square Feet (sq ft) |
|---|---|---|
| Smartphone screen (6.7") | ~28 sq in | ~0.19 sq ft |
| A4 paper | ~93.5 sq in | ~0.65 sq ft |
| Standard sheet of paper (8.5"×11") | 93.5 sq in | 0.65 sq ft |
| 12"×12" floor tile | 144 sq in | 1 sq ft |
| Small coffee table (2'×3') | 864 sq in | 6 sq ft |
| Average bedroom (12'×12') | 20,736 sq in | 144 sq ft |
Common area conversions for home improvement, crafting, and real estate
| Square Inches (sq in) | = | Square Feet (sq ft) | Practical Context |
|---|---|---|---|
| 12 sq in | = | 0.0833 sq ft | Small picture frame |
| 36 sq in | = | 0.25 sq ft | 6"×6" tile or craft project |
| 72 sq in | = | 0.5 sq ft | Half of a 12"×12" tile |
| 144 sq in | = | 1 sq ft | 12"×12" floor tile |
| 288 sq in | = | 2 sq ft | Small shelf or countertop section |
| 576 sq in | = | 4 sq ft | 2'×2' table surface |
| 1,728 sq in | = | 12 sq ft | 3'×4' area rug |
| 10,368 sq in | = | 72 sq ft | 8'×9' small room |
All conversions use the factor: 1 sq ft = 144 sq in | 1 sq in = 1/144 sq ft ≈ 0.006944 sq ft
Common questions about square inches and square feet conversions
The conversion factor comes from the relationship between inches and feet in the imperial system:
1 foot = 12 inches
1 square foot = 1 foot × 1 foot = 12 inches × 12 inches
12 × 12 = 144 → 1 square foot = 144 square inches
This is a standard area conversion in the imperial system, similar to how 1 square meter = 10,000 square centimeters in the metric system.
Use square inches for:
Use square feet for:
When measuring an area in inches and wanting square feet, follow these steps:
Example: A room measuring 144 inches × 180 inches
Square inches = 144 × 180 = 25,920 sq in
Square feet = 25,920 ÷ 144 = 180 sq ft
Alternative method: Convert inches to feet first (144" = 12', 180" = 15') then multiply 12' × 15' = 180 sq ft
Square inches and square feet remain common in the United States due to:
However, many industries that operate globally (like automotive and electronics) use metric units alongside imperial measurements.
The required accuracy depends on your application:
This converter offers multiple display formats to accommodate different accuracy needs.
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