How to convert square inches to square centimeters
To convert a measurement in square inches to square centimeters, multiply the value by 6.4516. The conversion factor comes from the relationship between both units and the square meter.
For example, to convert 5 in² to square centimeters: 5 × 6.4516 = 32.258 cm².
What is a square inch?
A square inch is an imperial and US customary unit of area equal to the area of a square one inch on each side, exactly 6.4516 square centimeters. The square inch is used for small areas in the US and UK, notably in engineering where pressure is measured in pounds per square inch (psi), one of the most common pressure units in the world.
Common uses of square inches include: Pressure measurement (pounds per square inch); Print and display area; Small material and gasket areas; Product surface and packaging specs.
What is a square centimeter?
A square centimeter is a metric unit of area equal to the area of a square one centimeter on each side, or one ten-thousandth of a square meter. Derived from the centimeter, this unit is convenient for small surfaces. It is widely used in science, medicine, and design for measuring cross-sections and small areas.
Common uses of square centimeters include: Wound and lesion size in medicine; Cross-sectional area in engineering; Material and fabric sample areas; Pressure calculations (force per cm²).
Square Inches to square centimeters worked examples
Here are some common values converted:
1 in² = 6.4516 cm² 5 in² = 32.258 cm² 10 in² = 64.516 cm² 50 in² = 322.58 cm² 100 in² = 645.16 cm²
Frequently asked questions
How many square centimeters are in one square inch?
One square inch (in²) equals 6.4516 square centimeters (cm²). Multiply any value in square inches by 6.4516 to convert to square centimeters.
How do I convert square inches to square centimeters?
Multiply the value in square inches by 6.4516. For example, 5 in² × 6.4516 = 32.258 cm².
How do I convert square centimeters to square inches?
Multiply the value in square centimeters by 0.155000310001, or divide by 6.4516. Use the swap button on the converter above to reverse the direction.
Is the square inch to square centimeter conversion exact?
Yes. Area conversions derive from the exact 1959 international definitions of the meter, yard, and foot, so the factors are exact.
What is the formula for square inches to square centimeters?
The formula is: cm² = in² × 6.4516. This comes from the definition of both units relative to the square meter.