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Permeability

mm²tocm²

Convert square millimetres (permeability) (mm²) to square centimetres (permeability) (cm²).

Factor1 mm² = 0.01 cm²

Converter

mm²

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1cm²

Rendered to 6 significant figures.

Formula

Formula
cm² = mm² × 0.01

Multiply any value in square millimetres (permeability) by 0.01 to obtain the value in square centimetres (permeability).

Worked example

Convert 100 mm² to cm².

  1. 01Start with 100 mm².
  2. 02Multiply by the conversion factor: 100 × 0.01 = 1 cm².
Result100 mm² = 1 cm²

Conversion table

mm²cm²
10.01
20.02
50.05
100.1
200.2
500.5
1001
2002
5005
100010

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mm² to cm²?
1 mm² equals 0.01 cm². To convert, multiply the value in square millimetres (permeability) by 0.01.
How do I convert 1 mm² to cm²?
1 mm² = 0.01 cm². For any value, multiply by 0.01.
How do I convert cm² back to mm²?
Divide by the same factor — or equivalently, multiply by 100. So 1 cm² = 100 mm².
When would I need to convert square millimetre (permeability) to square centimetre (permeability)?
Permeability conversions between mm² and cm² appear in petroleum and reservoir engineering, hydrogeology, geotechnical engineering, packed-bed filtration and porous-materials research. The darcy (D) and its sub-multiples (mD, µD, nD) dominate petroleum-engineering documentation; SI area-equivalent units (m², µm², mm², cm², ft²) appear in geophysics and porous-media research. Intrinsic permeability is a property of the porous medium alone — this category does NOT include hydraulic conductivity (m/s, requires fluid density and viscosity), gas permeability (Klinkenberg slip corrections) or membrane-permeability coefficients, all of which are different physical quantities and require explicit assumptions.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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