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Surface Tension

mN/mtomJ/m²

Convert millinewtons per metre (mN/m) to millijoules per square metre (mJ/m²).

Factor1 mN/m = 1 mJ/m²

Converter

mN/m

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

Result
72mJ/m²

Rendered to 6 significant figures.

Formula

Formula
mJ/m² = mN/m × 1

Multiply any value in millinewtons per metre by 1 to obtain the value in millijoules per square metre.

Worked example

Convert 72 mN/m to mJ/m².

  1. 01Start with 72 mN/m.
  2. 02Multiply by the conversion factor: 72 × 1 = 72 mJ/m².
Result72 mN/m = 72 mJ/m²

Conversion table

mN/mmJ/m²
11
22
55
1010
2020
5050
100100
200200
500500
10001000

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mN/m to mJ/m²?
1 mN/m equals 1 mJ/m². To convert, multiply the value in millinewtons per metre by 1.
How do I convert 1 mN/m to mJ/m²?
1 mN/m = 1 mJ/m². For any value, multiply by 1.
How do I convert mJ/m² back to mN/m?
Divide by the same factor — or equivalently, multiply by 1. So 1 mJ/m² = 1 mN/m.
When would I need to convert millinewton per metre to millijoule per square metre?
Surface-tension conversions between mN/m and mJ/m² appear in coatings and wettability work, surfactant and interfacial-tension measurement, foam and emulsion characterisation, and capillary/droplet-engineering datasheets. mN/m, dyn/cm and mJ/m² are exact numerical equivalents — they appear interchangeably across SI, CGS and surface-free-energy notations. lbf/ft and lbf/in are common in US petroleum interfacial-tension datasheets and US coatings documentation. This category does not include temperature-dependent material lookups or capillary/contact-angle calculators.
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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