CelsiustoFahrenheit.pro

Square Footage Calculator

Area120 sq ft
Square meters
11.15 m²
Square yards
13.33 yd²
Acres
0.0028

For an L-shaped or irregular room, split it into rectangles, calculate each one and add them together.

Calculate the area of a room, floor, lot or any simple shape in square feet, and optionally the total cost from a price per square foot.

How to use the Square Footage Calculator

  1. Choose the shape and the unit of your measurements.
  2. Enter the dimensions.
  3. Optionally enter a price per square foot to estimate cost.

How it works

  • Rectangle: length × width
  • Triangle: ½ × base × height
  • Circle: π × (diameter ÷ 2)²

Measurements in inches, yards or meters are converted to feet first. For flooring, add 5–10% extra for cuts and waste.

Common room sizes

RoomSquare feetSquare meters
10 × 10 ft1009.3
10 × 12 ft12011.1
12 × 12 ft14413.4
12 × 14 ft16815.6
14 × 16 ft22420.8
16 × 20 ft32029.7

Frequently asked questions

How do I calculate square footage of a room?

Multiply the length by the width in feet. A 12 × 14 ft room is 168 sq ft.

How do I measure an L-shaped room?

Split it into two rectangles, calculate each area and add them.

How many square feet in a square meter?

One square meter is about 10.764 square feet.

How many square feet is an acre?

One acre is exactly 43,560 square feet — roughly the size of an American football field without the end zones.

How much extra flooring should I buy?

Add about 5–10% to the measured square footage for cuts and waste, and 15% or more for diagonal or herringbone layouts.

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