https://www.nist.gov/publications/kilogram-and-measurements-mass-and-force
This paper describes the facilities, measurement capabilities, and ongoing research activities in the areas of Mass and Force at the National Institute of Stand
kilogrammeasurementsmassforcenist
https://www.metric-conversions.org/pressure/millimeters-of-water-to-kilogram-force-per-square-meter.htm
Millimeters of water to Kilogram force per square meter (mm H2O to kg/m2) conversion calculator for Pressure conversions with additional tables and formulas.
per square meterkilogram forcemillimeterswaterconversion