Convert Square Centimeters to Square Inches
Convert Square Centimeters to Square Inches instantly. 1 Square Centimeter (cm²) equals 0.155 Square Inches (in²).
Square Centimeters to Square Inches conversion table
| Square Centimeters (cm²) | Square Inches (in²) |
|---|---|
| 1 cm² | 0.155 in² |
| 2 cm² | 0.31 in² |
| 3 cm² | 0.465 in² |
| 5 cm² | 0.775 in² |
| 10 cm² | 1.55 in² |
| 20 cm² | 3.1 in² |
| 50 cm² | 7.75 in² |
| 100 cm² | 15.5 in² |
| 500 cm² | 77.5002 in² |
| 1,000 cm² | 155.0003 in² |
1 Square Centimeter = 0.155 Square Inches · multiply Square Centimeters by 0.155
About converting Square Centimeters to Square Inches
Square Centimeters (cm²) and Square Inches (in²) are both units of area, so converting between them is a single multiplication: multiply your Square Centimeters figure by 0.155. Ten Square Centimeters comes to 1.55 Square Inches, and a hundred works out at 15.5 Square Inches.
Rule of thumb: going from Square Centimeters to Square Inches divides, so the figure always shrinks — it takes about 6.4516 Square Centimeters to make a single Square Inch. If your answer came out bigger, you have the conversion the wrong way round.
What is a Square Centimeter?
A square centimeter is the area of a square one centimeter on a side, about the size of a shirt button. It is the working unit wherever an area is small enough to measure with a ruler but too big to bother counting in millimeters: the cross-section of a cable or a beam, the size of a burn or a wound in a medical note, a stamp, a sensor, a patch of skin. Clinical and laboratory work leans on it heavily because it keeps figures in the single and double digits, which is the range where a person can compare two numbers at a glance.
What is a Square Inch?
A square inch is the area of a square one inch on a side. You rarely meet it measuring a surface for its own sake; its real career is as a denominator. Pounds per square inch — psi — is how tyre pressure, hydraulics, air compressors and boiler ratings are quoted throughout the United States and, for tyres at least, in much of the metric world too. It also turns up in machining and materials work, where the load a bolt or a beam will take is naturally expressed per square inch of cross-section rather than in total.
To put both in perspective: a postage stamp is roughly 5 square centimeters, while a credit card is a little over 7 square inches.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Square Inches to Square Centimeters converter, or browse all Area converters.
Frequently asked questions
How many Square Inches are in one Square Centimeter?
There are 0.155 Square Inches in one Square Centimeter.
How do I convert Square Centimeters to Square Inches?
Multiply the number of Square Centimeters by 0.155. For example, 10 Square Centimeters = 1.55 Square Inches.
What is 100 Square Centimeters in Square Inches?
100 Square Centimeters is equal to 15.5 Square Inches.
How do I convert Square Inches to Square Centimeters?
Multiply the Square Inches value by 6.4516 (or divide by 0.155).
Is this Square Centimeters to Square Inches conversion exact?
The definition is exact — Square Centimeters and Square Inches are both fixed against the same base by international agreement — but the decimal shown here is rounded for readability, because the true ratio does not terminate. For engineering or scientific work, carry more decimal places than this page displays.
What is a Square Centimeter?
A square centimeter is the area of a square one centimeter on a side, about the size of a shirt button. It is the working unit wherever an area is small enough to measure with a ruler but too big to bother counting in millimeters: the cross-section of a cable or a beam, the size of a burn or a wound in a medical note, a stamp, a sensor, a patch of skin. Clinical and laboratory work leans on it heavily because it keeps figures in the single and double digits, which is the range where a person can compare two numbers at a glance.
What is a Square Inch?
A square inch is the area of a square one inch on a side. You rarely meet it measuring a surface for its own sake; its real career is as a denominator. Pounds per square inch — psi — is how tyre pressure, hydraulics, air compressors and boiler ratings are quoted throughout the United States and, for tyres at least, in much of the metric world too. It also turns up in machining and materials work, where the load a bolt or a beam will take is naturally expressed per square inch of cross-section rather than in total.