Square Feet to Square Inches Calculator
Convert square feet to square inches. 1 sq ft = 144 sq in (12 × 12 inches).
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sq ft
sq in
Conversion Formula
1 square foot = 144 square inches
Because 1 ft = 12 in, the area scales by 12 × 12 = 144.
Quick Reference
| Square Feet | Square Inches |
|---|---|
| 0.5 sq ft | 72 sq in |
| 1 sq ft | 144 sq in |
| 2 sq ft | 288 sq in |
| 5 sq ft | 720 sq in |
| 10 sq ft | 1,440 sq in |
| 25 sq ft | 3,600 sq in |
| 50 sq ft | 7,200 sq in |
| 100 sq ft | 14,400 sq in |
When to Use Square Inches
- Crafts, sewing, and quilting — small pieces measured in inches.
- Packaging and shipping label area.
- Small decals, vinyl lettering, and printing.
- Engineering drawings at 1:1 scale.
FAQ
Why is 1 sq ft = 144 sq in?
A square foot is 12 inches by 12 inches. Multiply: 12 × 12 = 144 square inches.
How many square inches in 10 square feet?
1,440 sq in (10 × 144).
How do I convert sq in back to sq ft?
Divide sq in by 144. Example: 2,880 sq in ÷ 144 = 20 sq ft.
Is 1 sq ft the same as 12 sq in?
No. 12 sq in is a 1 in × 12 in strip — not a square foot. A square foot covers 144 sq in because both sides are 12 inches long.
When should I prefer square inches to square feet?
When the item is small: craft projects, sewing pattern cuts, decals, packaging labels, and engineering drawings at 1:1 scale all work better in sq in.