in²
What is a Square Inch?
Area Unit
Definition
A square inch is a unit of area equal to the area of a square with 1-inch sides, approximately 6.45 square centimeters.
Popular Square Inch Conversions
Most common conversions from Square Inches
1 in² = 0.00064516 m² Square Inch to Square Meters 1 in² = 0.00000000064516 km² Square Inch to Square Kilometers 1 in² = 6.4516 cm² Square Inch to Square Centimeters 1 in² = 645.16 mm² Square Inch to Square Millimeters 1 in² = 0.000000064516 ha Square Inch to Hectares 1 in² = 0.00000015942 ac Square Inch to Acres
History
The square inch is used for measuring small areas, particularly in manufacturing and electronics.
Common Uses
- Computer chip sizes
- Pressure measurements (PSI)
- Screen pixel density (PPI)
- Manufacturing tolerances
Fun Facts
A postage stamp is about 1 square inch
PSI stands for 'pounds per square inch'
Modern phones have over 400 pixels per square inch
All Square Inch Conversions
Square Inches to Square Meters in² → m² Square Inches to Square Kilometers in² → km² Square Inches to Square Centimeters in² → cm² Square Inches to Square Millimeters in² → mm² Square Inches to Hectares in² → ha Square Inches to Acres in² → ac Square Inches to Square Miles in² → mi² Square Inches to Square Yards in² → yd² Square Inches to Square Feet in² → ft²