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Square Millimeter Converters

Convert square millimeters to and from square centimeters, square inches, square meters, and other area units.

What this tool does

Convert square millimeters to and from square centimeters, square inches, square meters, and other area units. Type an amount in square millimeters, choose the units, and the tool converts it to square centimeters. It offers 6 area units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Square millimeter, Square micrometer, Square centimeter, Square inch, Square meter, Square foot. Starts as Square millimeter.
  • To: Choose one of the same 6 units as "From". Starts as Square centimeter.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from square millimeters to square centimeters:

  • 1 mm² = 0.01 cm²
  • 5 mm² = 0.05 cm²
  • 10 mm² = 0.1 cm²
  • 50 mm² = 0.5 cm²
  • 100 mm² = 1 cm²

Multiply the number of square millimeters by 0.01 to get square centimeters. Both units are exact definitions, so 0.01 is the exact factor: 1 mm² = 0.01 cm².

Sources: Square millimeter: exact by definition. Square centimeter: exact by definition.

Limitations

  • Converts units of area only. It does not work out an area from lengths or measure a plot.
  • Square-unit conversions treat the area as a number: nothing about shape or location is considered.

FAQs

Q: How many square centimeters are in one square millimeter?
A: One square millimeter is 0.01 square centimeters. Choose square millimeters as From and square centimeters as To to convert any value.
Q: How many square inches are in one square millimeter?
A: One square millimeter is about 0.00155 square inches. Choose square millimeters as From and square inches as To to convert any value.
Q: How many square millimeters are in one square centimeter?
A: One square centimeter is 100 square millimeters. Choose square centimeters as From and square millimeters as To to convert any value.

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