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## Square Footage Calculator

Square footage is a measurement of an area expressed in square feet (unit of measurement). An area is is the size of two dimensional surface. The area of a square is the space contained within a set of lines. These lines should be measured in feet (ft) for square footage calculations and if needed, converted to inches (in), yards (yd), centimetres (cm), millimetres (mm) and metres (m).

## Select a Calculator

Please enter values in the input to get it convert into square feet then press "Calculate".

## Free calculator widget

You can put this calculator widget on your website, web page or blog.

Remember, the input can only be in feet (ft), inches (in), yards (yd), centimetres (cm), millimetres (mm) and metres (m) but never a combination of two different units!

Area = Side length x Side length
Length (drop down ft, in, yd, cm, mm, m)
Length (drop down ft, in, yd, cm, mm, m)
Price per unit (drop down ft2, in2, yd2, cm2, mm2, m2)

## Understanding the Square footage:

### How to calculate square footage?

Square footage is the measurement of an area. Area portrays the measurement of a two-dimensional space bordered by a set of lines. Square footage is most commonly calculated for the floorings of houses.

To calculate square footage, it is important to recognize the shape of the plane for example, if it’s a square, rectangle, or any other shape. The formula for square footage area used will be in accordance with the shape.

For example, to calculate square footage of a room in square (2) or rectangle shape. Simply multiply the length and width of the area.

To calculate square footage of an oddly shaped area, for example an L shaped area. Start by splitting the area into two separate sections making square or rectangle of both sections. Now, measure the area of both sections and add them together to get the total square footage.

Following are a few examples of how square footage calculators calculate the area for different shapes:

• 1. Square
Area (ft2) = Side Length x Side Length
• 2. Rectangle
Area (ft2) = Length x Width
• 3. Triangle
Area (ft2) = ½ × Base × Height
OR
Area (ft2) = ¼ x √ [ (a+b+c) x (b+c-a) x (c+a-b) x (a+b-c) ]
Where a, b and c are sides of a triangle.
• 4. Circle
Area (ft2) = π x (diameter/2)2
Where π = 3.14159265

Before calculating square footage make sure the measurements you have taken are in square feet (ft2). If your measurements are in another unit let’s say inches or meters, you will need to convert those measurements in feet by utilizing the method below.

Also checkout our conversion table below for more unit conversions.

If you have measured the length or width other than feet. Do the following to convert them into feet.

• – For inches (in to feet): divide the value by 12. Output will be in feet.
• – For yards (yds to feet): multiply the value by 3. Output will be in feet.
• – For meters (m to feet): multiply the value by 3.281. Output will be in feet.
• – For centimeters (cm to feet): multiply the value by 0.03281. Output will be in feet.
• – For millimeters (mm to feet): multiply the value by 0.00328084. Output will be in feet.

Square footage formula:

Length x Width = Area

### How many square feet is a 10×10 room?

10×10 dimensions are common for kitchens or small bedrooms.

10×10 suggests that the shape of the plane is a square as both the measurements are the same.

To calculate the square footage area of the square, use the formula =

Side length × Side Length

= 10 × 10 (assuming all measurements are in feet)

=100 ft2

### How many square feet is a 7×7 room?

7×7 dimensions are common for bathrooms, kitchens and book corners in houses.

7×7 suggests that the shape of the plane is a square as both the measurements are the same.

To calculate the square footage area of the square, use the formula =

Side length × Side Length

= 7 × 7 (assuming all measurements are in feet)

=49 ft2

### How many square feet is a 20×20 room?

20×20 dimensions are common for garages big enough to accommodate 2 cars, living room space, or big bedrooms usually with walk in closets.

20×20 suggests that the shape of the plane is a square as both the measurements are the same.

To calculate the square footage area of the square, use the formula =

Side length × Side Length

= 20 × 20 (assuming all measurements are in feet)

=400 ft2

Our Square Footage Calculator / SQFT calculator helps you calculate the area required for roofing shingles, landscaping for a garden, tiling, flooring space, carpeting and wallpaper. There is even a Siding Square Footage Calculator so you can estimate House Siding costs without any hassle.

We have covered most common use cases. Our calculator allows you to input length and width in many units, such as yards (yds), meters (m), millimeters (mm), centimeters (cm) and inches (in).

It automatically converts your input into feet and also provides output multiple units:

• – Square Footage (ft2)
• – Square Yards (yd2)
• – Square Meters (m2)
• – Acres (acre)

We also have price or cost input which completely optional but allows you to calculate the cost of materials such as plywood, aluminium, paint and labor cost (Most contractors use price per square foot when calculating their labor cost).

### How you can use square footage calculator in your daily life?

Since square footage (sq ft2) is a common unit of measurement. The usage of square footage calculator is also common in our daily life. Specially If you are a hobbyist who likes to work on DIY projects or a professional construction worker or a carpenter. Your projects may include roofing shingles, landscaping for a garden, tiling, flooring space, carpeting and wallpaper. Here we will explain a few real life examples of how square footage calculator can be useful in your next project?

#### 1. How to figure out number of sheets required to sheating wall or roof:

Fоr example, іf you hаvе a wall which is 8 feet high and 40 feet long. The ѕԛuаrе fооtаgе fоr thе wаll can be simply calculated with our square footage calculator. Which is going to be 320 Square feet (sq. ft. or ft2).

Mоѕt ѕhееt gооdѕ are 32 ѕԛuаrе feet. Thе ѕԛuаrе footage оf the wаll is divided by 32.

It wіll take 10 sheets оf рlуwооd or іnѕulаtеd sheathing tо cover thіѕ wаll.

#### 2. How to figure out cost of flooring:

Flооrіng is аlѕо аmоng one of thоѕе things that use thе square foot method tо figure lаbоr аnd materials. This іnсludеѕ сеrаmіс аnd ԛuаrrу tiles, hardwood, laminate, аnd vinyl flooring, аnd саrреtіng. Most соntrасtоrѕ аnd іnѕtаllеrѕ use a price реr square fооt fоr their labor whеn саlсulаtіng thеіr соѕtѕ for іnѕtаllаtіоn.

Abbreviations of unit area:

Ft2 = Square feet

In2 = Square Inches

Yd2 = Square Yards

Cm2 = Square Centimeters

Mm2 = Square Millimeters

M2 = Square Meters

Conversion factors:

To convert among square feet, square inches, square yards, square centimetres, square millimetres and square meters you can utilize the following conversion table.

 Square feet to yards multiply ft2 by 0.11111 to get yd2 Square feet to meters multiply ft2 by 0.092903 to get m2 Square yards to square feet multiply yd2 by 9 to get ft2 Square yards to square meters multiply yd2 by 0.836127 to get m2 Square meters to square feet multiply m2 by 10.7639 to get ft2 Square meters to square yards multiply m2 by 1.19599 to get yd2 Square meters to square millimetres multiply the m2 value by 1000000 to get mm2 Square meters to square centimetres multiply the m2 value by 10 000 to get cm2 Square centimetres to square metres multiply the cm2 value by 0.0001 to get mm2 Square centimetres to square millimetres multiply the cm2 value by 100 to get mm2 Square millimetres to square centimetres multiply the mm2 value by 0.000001 to get cm2 Square millimetres to square metres multiply the mm2 value by 1000000 to get m2

## FAQS

How to Calculate Square Footage?

Square footage is the measurement of an area. The area is the measurement of a two-dimension space bordered by a set of lines. Square footage is mostly used in the calculation for the flooring of the house. To calculate square footage area, it is important to recognize the shape of the plane for example, if it’s a square, rectangle, or any other shape, then the formula for square footage area will be according to the shape. For example, to calculate the square footage of a room in a square (2) or rectangle shape. Simply multiply the length and width of the area. To calculate square footage of an oddly shaped area, for example, an L-shaped area. Start by splitting the area into two separate sections making a square or rectangle of both sections. Now, measure the area of both sections and add them together to get the total square footage.
Following are a few examples of how square footage calculators calculate the area for different shapes:

1. Square => Area (ft2) = Side Length x Side Length

2. Rectangle => Area (ft2) = Length x Width

3. Triangle => Area (ft2) = ½ × Base × Height

4. Circle => Area (ft2) = π x (diameter/2)2

How to Calculate Square Footage of a Room?

Whenever you plan to buy new flooring, the first thing is to calculate the Square Footage of the room. It’s quite easy to calculate Square Footage, first, you need to measure the square footage of all areas of the room, this includes nooks and crannies and then you need to add all measurements together.

This planning takes time and lots of measurements so make sure to double-check your measurements before ordering your flooring.

For the safe side, add 5-10% of the waste factor, it is to prevent errors, damages, and extra cuts. To calculate this you need to add a waste factor in square footage like you have 100sqft and you are assuming 5% as a waste factor then 100 × 0.05 = 5 means total sqft will be 100 + 5 = 105sqft.

How to Calculate Square Footage of a House?

Whenever you plan to measure the square footage of the house, start with these supplies:

1- Notes, Pencil.

2- Calculator

3- Measuring tool

Now it is important to recognize the shape of the house, perfect square, rectangle, or any other shape, then the formula for square footage area will be according to the shape.
For example, to calculate the square footage of a room in a square (2) or rectangle shape. Simply multiply the length and width of the area.
If you are measuring for a two-story house, simply multiple the square footage by 2.

How to Measure for Wallpapering?

First, measure the width (feet) of the wall you plan to add wallpaper. Round the measurement up to the nearest foot. For example, if 14 feet, 9 inches wide, it will be around 15 feet. Then, measure the height (feet) of the wall you plan to add wallpaper. Round the measurement up to the nearest foot. Multiply the rounded width and the height of the wall. This will be your total square footage of the wall. Now measure the width and height of large areas that will not be going to be covered with wallpaper, such as double doors, and round these heights and width. Multiply the width and height of all these areas and sum them up together to get the total square footage of any large area. Subtract the square footage of any large areas from the total square footage of the wall. The result is the total square footage of wallpaper needed to cover the wall.