Square Footage Calculator
Calculate the area of rooms and spaces in square feet. Supports multiple shapes β add rooms for a running total.Updated 2026-03-16
Square Footage Formulas
Area = Length Γ Width
Area = Ο Γ rΒ²
Area = Β½ Γ Base Γ Height
Area = Rect1 + Rect2
Common Room Sizes
| Room Type | Typical Size | Sq Ft |
|---|---|---|
| Small Bedroom | 10 Γ 10 ft | 100 sq ft |
| Master Bedroom | 14 Γ 16 ft | 224 sq ft |
| Living Room | 16 Γ 20 ft | 320 sq ft |
| Kitchen | 12 Γ 12 ft | 144 sq ft |
| Bathroom | 5 Γ 8 ft | 40 sq ft |
| Dining Room | 12 Γ 14 ft | 168 sq ft |
| Home Office | 10 Γ 12 ft | 120 sq ft |
| 1-Car Garage | 12 Γ 20 ft | 240 sq ft |
| 2-Car Garage | 20 Γ 20 ft | 400 sq ft |
Frequently Asked Questions
How do I calculate square footage?
For a rectangular room, multiply length by width in feet. For example, a 12 ft Γ 10 ft room = 120 square feet. For irregular shapes, break the area into simpler shapes, calculate each, and add them together.
How do I convert square feet to square meters?
Divide square feet by 10.764 to get square meters. For example, 500 sq ft Γ· 10.764 = 46.45 sq m. This calculator shows both units automatically.
How much flooring do I need?
Calculate the total square footage of all rooms, then add 10% for waste and cuts. For example, if your rooms total 500 sq ft, order at least 550 sq ft of flooring material.
"Square Footage Calculator." GoCalc, go-calc.com, https://go-calc.com/tools/square-footage-calculator/. Accessed 2026-03-16.