Square Footage Calculator
Last updated: June 16, 2026Area in sq ft or m² — plus material cost.
The Square Footage Calculator turns a room's length and width into total square footage instantly, multiplying by your room count and showing the same area in square metres alongside. Enter dimensions in feet or metres, add a price per square foot, and it estimates material cost too. Everything runs in your browser — free, no sign-up, with nothing uploaded.
How to use Square Footage Calculator
Switch between Feet and Meters at the top, then type the length and width of your space. The total area updates as you type. To cover several identically sized rooms, raise the quantity, and to estimate cost, enter a price per square foot or metre. All three results appear together below.
Read the full guide: How to Calculate Square Footage (Free Online Tool)
- 1Pick Feet or Meters, then enter the length and width of the room.
- 2Set Quantity to the number of identically sized rooms or sections to add together.
- 3Enter a price per square foot or metre to get an estimated material cost.
- 4Read the total area, the metric/imperial equivalent, and the cost side by side.
Both units at once
Every result shows square feet and square metres together, using the exact 1 m² = 10.7639 ft² conversion.
Multiply across rooms
The quantity field totals several same-sized spaces in one figure, so you don't add rooms by hand.
Built-in cost estimate
A price-per-unit field turns your area straight into a material budget as you type.
Flooring and tile material estimates
Measure each room, set the unit to feet, and enter the price per square foot from your flooring quote. The calculator returns the total area and the dollar cost together, so you can size up hardwood, laminate, carpet, or tile and compare suppliers before ordering. Bump the quantity to cover several rooms with the same dimensions.
Paint and wall coverage planning
Enter a wall's length and height instead of floor dimensions to get its surface area in square feet or metres. Use the quantity field for the number of identical walls, then read the total to match it against the coverage rating printed on a paint can or wallpaper roll, avoiding a second trip to the store.
Convert square feet to square metres
Real-estate listings and product specs often mix units. Type an area's length and width in feet and the metric equivalent appears instantly using the precise 10.7639 factor, or switch to Meters to go the other way — handy for comparing a US listing with a metric floor plan or imported flooring sold by the square metre.
Pricing a project per square foot
Contractors and freelancers quoting by area can enter total dimensions and a rate per square foot to preview the job total in seconds. Adjust the rate to test different margins, or raise the quantity to price multiple identical units, then quote a client a clean number without spreadsheet math.
Square Footage Calculator — frequently asked questions
How do I calculate square footage?
Multiply length by width in feet: a 12 ft by 10 ft room is 120 sq ft. This tool does that automatically and multiplies by your room count.
How do I convert square feet to square metres?
Divide square feet by 10.7639 (or multiply square metres by 10.7639 to go the other way). The calculator shows both figures at once, so you never do the math yourself.
How does the quantity field work?
It multiplies the single-room area by the number you enter, giving the combined total for that many identically sized rooms — useful for matching floors, panels, or repeated spaces.
How is the cost estimate calculated?
It multiplies your total area by the price per square foot or metre you enter and shows the result in US dollars. Leave price at zero and the cost simply stays blank.
Is anything I type uploaded?
No. Every calculation happens locally in your browser. No dimensions, prices, or results are sent anywhere, and there's no sign-up.
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