Calculator for Sq Feet
The quickest way to calculate sq feet for any space. Whether you're measuring a bedroom for carpet, a kitchen for tiles, or a garden for decking — enter your dimensions or draw the room shape and get an instant square footage result.
Square footage guide
How to Calculate Sq Feet
Sq feet is an area measurement. For simple rooms, the formula is length multiplied by width, both measured in feet. For flooring, tiles, turf or decking, remember to include waste so you do not run short during fitting.
- Choose your room shape: rectangle, L-shape, circle or draw it freehand.
- Enter your measurements in feet and inches.
- Add a waste allowance for cuts and offcuts. 10% is standard for most flooring.
- Read your result in sq feet and convert to m² with one click if needed.
Reference table
Common Room Sizes in Sq Feet
These example sizes help you sense-check a square footage estimate before ordering flooring, paint, decking or other home improvement materials.
| Room | Typical size | Sq feet |
|---|---|---|
| Small bedroom | 10 × 10 ft | 100 sq ft |
| Double bedroom | 12 × 12 ft | 144 sq ft |
| Master bedroom | 14 × 16 ft | 224 sq ft |
| Small living room | 12 × 15 ft | 180 sq ft |
| Large living room | 16 × 20 ft | 320 sq ft |
| Kitchen | 10 × 12 ft | 120 sq ft |
| Bathroom | 8 × 8 ft | 64 sq ft |
| Hallway | 4 × 12 ft | 48 sq ft |
| Garage (single) | 12 × 20 ft | 240 sq ft |
| Studio apartment | 20 × 25 ft | 500 sq ft |
Use the calculator above to find the exact sq feet for your specific room dimensions — these figures are typical averages only.
Calculator for sq feet FAQ
Sq Feet Calculator — Frequently Asked Questions
How do I calculate sq feet of a room?
Multiply length by width in feet. A 12ft by 10ft room equals 120 sq feet. For L-shaped rooms, split the space into rectangles, calculate each area and add them together. Our calculator for sq feet handles common shapes and drawn rooms automatically.
How many sq feet is a 12x12 room?
A 12x12 room is exactly 144 sq feet, which is about 13.4 square metres. If you are buying flooring and want a standard 10% waste allowance, you should plan for roughly 158 sq feet of material before checking pack sizes.
How do I convert sq feet to square metres?
Divide sq feet by 10.764 to get square metres. For example, 144 sq feet divided by 10.764 equals about 13.4 m². MeasureRoom can show square feet and metric equivalents, and the converter page handles quick unit switches.
How many sq feet do I need for flooring?
Measure the usable floor area in sq feet, then add waste for cuts, boards, joins and offcuts. A 10% allowance is standard for most straight flooring layouts, while diagonal patterns or awkward rooms may need 15% or more.
What is the difference between sq feet and linear feet?
Sq feet measures area, so it uses length times width. Linear feet measures length only, which is useful for skirting boards, edging, borders and trims. For flooring, carpet, tiles, decking and sheet materials you normally need sq feet.
Can I calculate sq feet from metres?
Yes. First calculate the area in square metres, then multiply by 10.764 to convert it into sq feet. You can also use the MeasureRoom converter to switch between m² and sq ft instantly without doing the formula manually.
Calculating for a flooring project?
Get a full material estimate with waste allowance and cost breakdown — free.