Surface Tension Converter
Convert surface tension units used in fluid science and engineering.
How to Use the Surface Tension Converter
Enter a surface tension value, choose the source unit and select the target unit to convert between N/m, mN/m and dyn/cm.
Practical Example
0.072 N/m equals 72 mN/m and 72 dyn/cm, close to water at room temperature.
Factors That Affect Surface Tension
Temperature, dissolved substances, contamination and fluid composition can change measured surface tension.
Frequently Asked Questions
What is surface tension?
It is force per unit length acting along a liquid surface.
Are mN/m and dyn/cm numerically equal?
Yes. 1 mN/m equals 1 dyn/cm.
Does temperature affect surface tension?
Yes. For many liquids, surface tension decreases as temperature rises.
Understanding Surface Tension Units
Surface tension represents force per unit length at a liquid interface and is commonly expressed in N/m, mN/m or dyn/cm. Some of these units have simple numerical relationships, but the selected force and length scales should still be checked carefully.
The converter changes units only. Actual surface tension can vary with temperature, dissolved substances and contamination, so measurements should be compared under similar fluid conditions.
Unit Relationship and Practical Context
Surface tension is force per unit length, commonly N/m or mN/m. Since 1 dyn/cm = 1 mN/m, those values are numerically equal; temperature, contamination and fluid composition can materially change measured surface tension.