Square Footage Calculator
Calculate square feet from length and width, add a waste allowance, and estimate project cost. Then jump into practical tools for paint, concrete, gravel, mulch, roofing, flooring and more.
Calculate your area
Enter the measurements for your room, floor or project area. Add waste if you’re estimating materials like flooring, tile or paint.
What are you working on?
Room Size Calculator
Calculate room square feet, square yards and perimeter.
Open calculator →Wall Square Footage Calculator
Calculate wall area and subtract doors and windows.
Open calculator →Carpet Calculator
Estimate carpet area and waste.
Open calculator →Lawn Square Footage Calculator
Calculate lawn area in square feet and acres.
Open calculator →Roof Square Footage Calculator
Estimate sloped roof area from building footprint and pitch.
Open calculator →Paint Calculator
Estimate paint gallons from wall dimensions, coats and coverage.
Open calculator →Useful, practical results
Get calculations for area, waste allowance and cost so you can plan with confidence before ordering materials.
No clutter, no guesswork
Clean inputs, instant outputs and simple tool pages make the site feel like a toolbox, not a wall of filler.
A complete project toolkit
Browse calculators for flooring, concrete, paint, garden materials, roofing and more without losing the clean experience.
Explore the full measurement library
Browse all calculators and find the right tool for your next room, renovation, garden or building project.
Explore all calculators