How to convert square centimeters to square inches
To convert a measurement in square centimeters to square inches, multiply the value by 0.155000310001. The conversion factor comes from the relationship between both units and the square meter.
For example, to convert 5 cm² to square inches: 5 × 0.155000310001 = 0.775001550003 in².
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).
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.
Square Centimeters to square inches worked examples
Here are some common values converted:
1 cm² = 0.155000310001 in² 5 cm² = 0.775001550003 in² 10 cm² = 1.550003 in² 50 cm² = 7.750016 in² 100 cm² = 15.500031 in²
Frequently asked questions
How many square inches are in one square centimeter?
One square centimeter (cm²) equals 0.155000310001 square inches (in²). Multiply any value in square centimeters by 0.155000310001 to convert to square inches.
How do I convert square centimeters to square inches?
Multiply the value in square centimeters by 0.155000310001. For example, 5 cm² × 0.155000310001 = 0.775001550003 in².
How do I convert square inches to square centimeters?
Multiply the value in square inches by 6.4516, or divide by 0.155000310001. Use the swap button on the converter above to reverse the direction.
Is the square centimeter to square inch 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 centimeters to square inches?
The formula is: in² = cm² × 0.155000310001. This comes from the definition of both units relative to the square meter.