📐 Square Footage Calculator (sq ft & m²)

Get the square footage of any space in seconds.

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Fill in the details and click Calculate to see your results.

Formula at a glance

Square Footage Calculator: Area — Σ (length × width). Example: Two rooms 12×10 and 15.5×8 ft → Total area: 244 sq ft
How the Square Footage Calculator works: Area — Σ (length × width)

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📘 About the Square Footage Calculator

Square footage is length × width in feet. For irregular rooms, divide them into rectangles, work out each and add them together.

The calculator also converts to square metres, square yards and acres, and multiplies by a price per square foot for flooring, painting, cleaning or renting.

🧮 Formula

Area
Σ (length × width)
m²
sq ft ÷ 10.764

✏️ Worked examples

Two rooms 12×10 and 15.5×8 ft

You enter
Areas (length x width)12x10, 15.5x8
Measured inFeet
Price per sq ft (optional)0
Currency$
You get
Total area244 sq ft
Square metres22.67 m²
Square yards27.11 sq yd
Acres0.0056

244 sq ft.

Apartment 6×4 m + 3×3 m

You enter
Areas (length x width)6x4, 3x3
Measured inMetres
Price per sq ft (optional)0
Currency$
You get
Total area33 m²
Square feet355.21 sq ft
Square yards39.47 sq yd
Acres0.00815

33 m².

🧭 How to use this calculator

What you enter

  • Areas (length x width)
  • Measured in
  • Price per sq ft (optional)
  • Currency

What you get

  • Total area
  • Square metres
  • Square yards
  • Acres

❓ Frequently asked questions

How do I calculate square footage?

Multiply length by width in feet. A 12 × 10 ft room is 120 sq ft.

How many square feet in a square metre?

10.764.

How do I measure an L-shaped room?

Split it into two rectangles, find the area of each and add them.

How many square feet is an acre?

43,560 sq ft.