Square Footage Calculator
Room area for flooring, paint and materials.
Enter your values
ⓘ Live results
Results
- Area
- 216 sq ft
- With waste allowance
- 237.6 sq ft
- In square metres
- 20.07
- Material cost
- $831.6
- Perimeter
- 60 ft
Quick answer
Square footage is length × width; add 10% waste for flooring cuts and pattern matching.
Area = length × width
How to use the Square Footage Calculator
- 1Measure the room's length and width in feet.
- 2Set a waste allowance for cuts.
- 3Add material price for a cost estimate.
Worked example
Using the values the calculator loads with:
Inputs
- Length18 ft
- Width12 ft
- Waste allowance10 %
- Material price3.50 $/sq ft
Results
- Area216 sq ft
- With waste allowance237.6 sq ft
- In square metres20.07
- Material cost$831.6
- Perimeter60 ft
Frequently asked questions
How much waste should I allow?
10% for straight-lay flooring, 15% for diagonal patterns and 20% for herringbone or heavily patterned material.
How do I handle L-shaped rooms?
Split them into rectangles, calculate each separately and add the areas together.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.