Square Inches Calculator Online

A square inches calculator is an indispensable tool designed to compute the area of various flat surfaces and shapes. Whether you’re laying down flooring, cutting material for a project, or estimating land size, this calculator can assist in numerous everyday and professional tasks.

Formula of Square Inches Calculator

To effectively use the square inches calculator, understanding the formulas for different shapes is crucial:

Rectangle: Area = length × width

• Area is the total surface area in square inches.
• length is the length of the rectangle in inches.
• width is the width of the rectangle in inches.

Triangle: Area = 0.5 × base × height

• Area represents the area in square inches.
• base is the length of the base of the triangle in inches.
• height is the vertical height from the base to the triangle’s apex in inches.

Circle: Area = π × radius^2

• Area is the area of the circle in square inches.
• π (Pi) is approximately 3.14159.
• radius is the distance from the center to the edge of the circle in inches.

Trapezoid: Area = 0.5 × (base1 + base2) × height

• Area is the area in square inches.
• base1 and base2 are the lengths of the parallel sides in inches.
• height is the distance between these parallel sides in inches.

Table for General Terms

Below is a table featuring commonly calculated dimensions to help users apply these calculations without manual input each time:

Shape	Dimension Examples	Calculated Area
Rectangle	5 in × 10 in	50 sq in
Triangle	6 in base × 3 in height	9 sq in
Circle	Radius of 4 in	50.24 sq in
Trapezoid	Bases of 4 in and 6 in, Height of 5 in	25 sq in

Example of Square Inches Calculator

Example1: Rectangle To find the area of a 10-inch by 15-inch rectangle: Area = 10 in × 15 in = 150 sq in.

Example2: Circle To find the area of a circle with a radius of 3 inches: Area = π × (3 in)^2 ≈ 28.27 sq in.

Most Common FAQs