Measure area in square feet. This free square footage calculator sums one or many rectangular areas in feet, feet-and-inches or metres, shows square metres and yards, and estimates cost from a price per unit.
Areas
Area (optional)LengthWidth
/ ft²
Add a row for each rectangular area (a room, wall or section). The calculator sums them and, if you enter a price per unit, estimates the total cost — handy for flooring, paint or turf.
Total area
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Add an area
Square feet
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Square metres
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Square yards
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Estimated cost
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Square footage of a rectangle is length × width. For an L-shape or complex room, split it into rectangles, add a row for each, and the calculator totals them.
Use this free square footage calculator to measure the area of a room or space. Add one area or several, in feet, feet-and-inches or metres, and get the total — with an optional cost estimate.
What this square footage calculator does
A square footage calculator finds the area of rectangular spaces and adds them together. Enter length and width for each area and it totals the square feet (plus square metres and yards), and can multiply by a price for flooring, paint or turf.
How square footage is calculated
square footage = length × width
total = sum of all areas
cost = total × price per square foot
A 12 ft × 10 ft room is 120 ft². Add an 8 ft × 6 ft area and the total is 168 ft².
Measuring L-shaped or complex rooms
Split the space into rectangles, measure each, and add a row per rectangle — the calculator sums them. This handles L-shapes, alcoves and multi-room totals without any extra maths.
Area conversions
Unit
Equals
1 square foot
0.0929 m² · 0.111 yd²
1 square metre
10.764 ft²
1 square yard
9 ft²
How to use the square footage calculator
Choose feet, feet-and-inches, or metres.
Enter length and width for each area.
Add a price per unit for an optional cost estimate.
Square Footage FAQ
How do I calculate square footage?
Multiply length by width. A 12 ft by 10 ft room is 120 square feet. For several areas, add each one's square footage together.
How do I find the square footage of an L-shaped room?
Split it into rectangles, measure each, and add a row per rectangle. The calculator totals them automatically.
How do I convert square metres to square feet?
Multiply square metres by 10.764. So 12 m² is about 129 ft². The calculator shows feet, metres and yards together.
Can I estimate flooring or paint cost?
Yes. Enter a price per square foot (or per square metre) and the calculator multiplies it by the total area.
What about circles or triangles?
This tool handles rectangles. For round or triangular areas, use the Area Calculator, then you can add the result here as a known area.
Is the square footage calculator free?
Yes, this square footage calculator is completely free, needs no sign-up, and gives instant results in your browser.
