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Square Footage Calculator

Select the room/s and its shape. The calculator will calculate the square footage present in it.

area/One room

Square/One room

Multiple rooms

Border Width (a) Height:

cm ▾

No of sides (optional):

m² ▾

Quantity

Related

Our square footage calculator helps you quickly determine the area of any property or room. You can also convert the area into square meters, square yards, acres, and other units. Additionally, estimate the total cost of the property based on price per square foot using this tool.

Square Footage Formulas:

Square:

Area (ft²) = Side × Side

Rectangle:

Area (ft²) = Length × Width

Triangle:

Area (ft²) = 0.5 × Base × Height

Circle:

Area (ft²) = π × (Radius)²

Trapezoid:

Area (ft²) = 0.5 × (Base1 + Base2) × Height

Parallelogram:

Area (ft²) = Base × Height

Ellipse:

Area (ft²) = π × Major Axis × Minor Axis

Annulus (Ring):

Area (ft²) = π × (Outer Radius² - Inner Radius²)

Example Calculation:

Calculate the area of a room measuring 15 ft by 10 ft:

Length = 15 ft, Width = 10 ft

Area = Length × Width = 15 × 10 = 150 ft²

Calculating Price Per Square Foot:

Estimate property cost using:

Price per Square Foot = Total Property Price ÷ Total Area (ft²)

How the Square Footage Calculator Works:

Input:

Select whether the property is a single room or multiple areas.
Enter the dimensions for length, width, or radius depending on the shape.
Optionally, enter the price per square foot for cost calculation.
Click "Calculate".

Output:

Area in square feet, square meters, square yards, square inches, and acres.
Total cost based on the price per square foot.

FAQ’s:

How Many Square Feet in a 20 × 15 Room?

Multiply length by width: 20 × 15 = 300 ft².

How Do I Convert Square Feet to Acres?

1 acre = 43,560 ft². Divide the square feet by 43,560 to get acres.

Unit Conversions:

Square Feet to Square Meters	Multiply ft² by 0.092903 to get m²
Square Feet to Square Yards	Multiply ft² by 0.11111 to get yd²
Square Yards to Square Feet	Multiply yd² by 9 to get ft²
Square Meters to Square Feet	Multiply m² by 10.7639 to get ft²
Square Feet to Acres	Divide ft² by 43,560 to get acres

References:

From Wikipedia: Area – Square Foot, Conversions, and Formulas

From Lumen Learning: Linear, Square, and Cubic Measure

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