Turn room dimensions into estimate-ready area.
Enter length, width, wall height, and openings. The calculator shows floor area, ceiling area, wall area, perimeter, and adjusted wall area for estimating work.
Area is where the estimate starts.
Once the square footage is clear, you can add waste, material cost, labor rate, markup, and job-specific risk before sending a customer-facing number.
FAQ
How does this square footage calculator work?
Enter room length, width, wall height, and opening area. The calculator estimates floor area, ceiling area, wall area, perimeter, and adjusted wall area after openings.
Can contractors use this for painting, flooring, and drywall?
Yes. Floor area is useful for flooring and ceiling work. Wall area is useful for painting and drywall planning. Always review the number against the actual jobsite conditions.
Should I subtract doors and windows?
If you want a tighter wall-area estimate, enter the combined opening area for doors, windows, and other large non-work areas. Some contractors leave small openings in the count to cover cutting and waste.
Does this include waste?
No. This calculator estimates area. Use the material waste calculator when you need to add a waste allowance and round up to package quantities.
Does this replace measuring the jobsite?
No. This is a planning aid. Confirm actual dimensions, slopes, alcoves, closets, openings, and material requirements before sending a final estimate.