Square Footage Calculator
Use our free square footage calculator to determine the total area of any space based on its length and width. Ideal for homeowners, contractors, interior designers, and DIYers estimating material needs for flooring, paint, tiles, or landscaping. Whether you’re measuring a single room or multiple areas, this calculator simplifies conversions between feet, inches, yards, and meters. It helps avoid costly mistakes when ordering materials or quoting jobs. By accounting for irregular shapes and optional waste allowances, you’ll always have precise area calculations for efficient planning and budgeting.
Square Footage Formula
Knowing square footage is essential for accurate material estimates and project pricing. Flooring, paint, and tile costs are often priced “per square foot.” Over- or underestimating even slightly can mean wasted money or unfinished coverage. The Square Footage Calculator removes guesswork—handling multiple units, rounding, and irregular shapes instantly. You’ll save time and ensure your budget aligns perfectly with your material needs.
How this square footage calculator works
This calculator multiplies your room’s length and width to determine total area, then converts and summarizes results in square feet, square meters, and square yards.
Here’s what it accounts for:
When to use this square footage calculator
Use this calculator for any project requiring accurate area measurement or cost estimation.
Flooring installation: Tile, carpet, laminate, or hardwood area calculation.
Painting projects: Estimate wall or ceiling coverage for paint gallons.
Landscaping: Calculate sod, mulch, gravel, or paver requirements.
Interior design: Determine rug sizes or furniture layout.
Construction planning: Compute area for drywall, insulation, or roofing materials.
Real estate: Verify property size for listings or appraisals.
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Average Material Coverage Benchmarks
Use these benchmarks to estimate how much product you'll need per square foot.
1 gallon of paint
1 box of laminate flooring
1 cubic yard of concrete
1 roll of carpet
1 pallet of sod
These figures help homeowners and professionals plan material quantities more precisely before ordering.
Frequently Asked Questions
Multiply length by width in feet. If measurements are in inches or meters, convert first.
It calculates in feet and square feet. You can convert to square meters if needed.
Yes—just enter the length and width of the area.
Absolutely. Agents use square footage to compare property values.
Yes—calculate each room separately and add them together.
No—this tool only calculates floor area. For volume, multiply area by ceiling height.
Not directly. Use shape-specific formulas, or break the area into rectangles for approximation.
Pair it with ServiceAgent.ai to quickly create proposals, estimates, and project tracking.