Question: how to convert n/mm to kn/m?
Answer: More information from the unit converter The answer is 1. We assume you are converting between newton/millimetre and kilonewton/metre. You can view more details on each measurement unit: N/mm or KN/m The SI derived unit for surface tension is the newton/meter. 1 newton/meter is equal to 0.001 N/mm, or 0.001 KN/m.