Square millimeter to Square centimeter Converter (and vice versa)

Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026

This converter allows you to convert square millimeters [mm²] to square centimeters [cm²] or square centimeters [cm²] to square millimeters [mm²]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.

1 square millimeter [mm²] = 0.01 square centimeters [cm²]1 square centimeter [cm²] = 100 square millimeters [mm²]

Convert square millimeters to square centimeters

There are two simple ways to convert square millimeters [mm²] to square centimeters [cm²]. In the first calculation method, the value in square millimeters [mm²] is divided by 100. The second method multiplies the value in square millimeters [mm²] by 0.01.

  • Square centimeters [cm²] = square millimeters [mm²] ÷ 100
  • Square centimeters [cm²] = square millimeters [mm²] * 0.01

Convert square centimeters to square millimeters

Converting square centimeters [cm²] to square millimeters [mm²] is easy and can be done in two ways. The first method involves multiplication, whereby the value in square centimeters [cm²] is multiplied by 100. The second variant is a division. Here, the value in square centimeters [cm²] is divided by 0.01.

  • Square millimeters [mm²] = square centimeters [cm²] * 100
  • Square millimeters [mm²] = square centimeters [cm²] ÷ 0.01

Converter

Decimal places

How it's calculated

Factor: 
100
Square millimeters=Square centimeters*100
Square centimeters=
Square millimeters100

To all available units

Square millimeters

Square decimeters

Square millimeters

Square feet

Square millimeters

Square inches

Square millimeters

Square kilometers

Square millimeters

Square micrometers