Measure any floor, wall or plot in square feet
Square footage is the number buyers, tenants, builders and decorators all use to talk about space. It tells you how much flooring to order, how many liters of paint a wall needs and what a property listing is really offering. This calculator handles the three shapes most people meet: rectangles, triangles and circles, and it lets you enter each measurement in whichever unit you happen to have.
Enter your dimensions, press calculate, and you receive the area in square feet along with square meters, square yards and square inches. If you know the material price, add it and the tool estimates the total cost for the area, multiplied by the number of identical spaces you entered.
The formulas behind the answer
- Rectangle or square: length × width.
- Triangle: half of base × height.
- Circle: π × radius × radius.
For an irregular room, split it into rectangles, calculate each part, and add the results together.
How to use the Square Footage Calculator
- Choose the shape that best matches the space.
- Enter each dimension and select its unit. Different dimensions can use different units.
- Set the number of identical areas if you are measuring several matching rooms.
- Add a price and pick the unit it applies to if you want a cost estimate, then choose a currency symbol.
- Press Calculate area and read the totals in square feet, meters, yards and inches.
What you get
- Rectangle, triangle and circle in one calculator.
- Feet, inches, yards, meters and centimeters, mixed freely.
- Instant conversion to sq m, sq yd and sq in.
- Optional cost estimate in dollars, rupees, euros or pounds.
- Quantity multiplier for repeated rooms, tiles or plots.
When it comes in handy
- Ordering flooring, tiles or carpet with a small allowance for waste.
- Estimating paint or wallpaper for walls.
- Comparing property listings given in different units.
- Planning a garden bed, lawn or round patio.
- Working out rent or cleaning cost per square foot.
Handy conversions
| From | To |
|---|---|
| 1 square yard | 9 square feet |
| 1 square meter | 10.7639 square feet |
| 1 square foot | 144 square inches |
| 1 square foot | 0.0929 square meters |
Tips for better results
- Measure twice at the longest and widest points, and write the numbers down before typing them.
- Add 5 to 10 percent to flooring or tile orders for cuts and breakage.
- Subtract doors and large windows when you estimate wall paint.
- Keep every dimension in the same unit if you are checking the result by hand.
- Remember that a property listing may measure carpet area, built-up area or super built-up area differently.
Frequently asked questions
How do I calculate square footage of a room?
Measure the length and width in feet and multiply them. A room 12 feet by 10 feet is 120 square feet. If the room is not a simple rectangle, divide it into rectangles and add the areas.
Can I enter inches or meters instead of feet?
Yes. Every dimension has its own unit menu, and the calculator converts everything to feet behind the scenes.
How do I find the area of a circle?
Enter the radius, which is half of the width across the circle. The tool multiplies π by the radius squared.
How do I estimate the cost?
Type the price of your material, choose whether it is per square foot, meter or yard, and select a currency symbol. The cost shown is the price multiplied by the total area.
What does the number of areas box do?
It multiplies the result for identical spaces, such as four equal bedrooms, so you do not have to calculate each one.
How accurate is the result?
The math is exact, but your answer is only as accurate as your measurements. Round to the nearest inch for flooring work and add an allowance for waste.
How many square feet are in a square meter?
One square meter equals about 10.76 square feet.
More from our network
A similar tool is available on our sister site: the Square Footage Calculator on UseTools.in, alongside more free online tools.