Square Footage Calculator

Compute total square footage for flooring, landscaping, or room areas across rectangle, circle, triangle, and multi-room layouts.

How to use this calculator

1. Pick shape.
2. Enter dimensions.
3. Read total area with waste.

Formula & method

Area Formula

Area = Length × Width

Floor area math.

Example

15ft × 12ft = 180 sq ft + 10% = 198 sq ft.

Key insights

• 1 m² = 10.7639 sq ft.

How to interpret your result

Total Area

Net area plus waste.

Frequently asked questions

How much waste?

10% standard, 15% diagonal tile.

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