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Surface Tension

mN/mtoN/m

Convert millinewtons per metre (mN/m) to newtons per metre (surface tension) (N/m).

Factor1 mN/m = 0.001 N/m

Converter

mN/m

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

Result
1N/m

Rendered to 6 significant figures.

Formula

Formula
N/m = mN/m × 0.001

Multiply any value in millinewtons per metre by 0.001 to obtain the value in newtons per metre (surface tension).

Worked example

Convert 1000 mN/m to N/m.

  1. 01Start with 1000 mN/m.
  2. 02Multiply by the conversion factor: 1000 × 0.001 = 1 N/m.
Result1000 mN/m = 1 N/m

Conversion table

mN/mN/m
10.001
20.002
50.005
100.01
200.02
500.05
1000.1
2000.2
5000.5
10001

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from mN/m to N/m?
1 mN/m equals 0.001 N/m. To convert, multiply the value in millinewtons per metre by 0.001.
How do I convert 1 mN/m to N/m?
1 mN/m = 0.001 N/m. For any value, multiply by 0.001.
How do I convert N/m back to mN/m?
Divide by the same factor — or equivalently, multiply by 1000. So 1 N/m = 1000 mN/m.
When would I need to convert millinewton per metre to newton per metre (surface tension)?
Surface-tension conversions between mN/m and N/m 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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