Convert Kilograms-force per Square Millimetre to inH₂O
1 kilogram-force per square millimetre (kgf/mm²) = 39370.07874 inches of water (inH₂O). 1 inH₂O = 0.0000254 kgf/mm². Example: 15 kgf/mm² = 15 × 39370.07874 = 590551.1811 inH₂O.
Also searched as kilograms-force per square millimetre to inH2O, kilograms-force per square millimetre in inH2O, kilograms-force per square millimetre into inches of water, kgf/mm2 to inH2O, kgf/mm2 in inches of water, kgf/mm2 into inch of water, kilogram-force per square millimetre to inch of water, kgf/mm2 to inches of water converter, kilograms-force per square millimeter to inches of water and how many inches of water in a kilogram-force per square millimetre.
1 kgf/mm² = 39370.07874 inH₂O
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilogram-force per square millimetre to inch of water converter to paste a column from Excel.
How to Convert Kilogram-force per Square Millimetre to Inch of Water
- 1 kgf/mm² = 39370.07874 inH₂O
- 1 inH₂O = 0.0000254 kgf/mm²
- Example: convert 15 kgf/mm² to inH₂O: 15 kgf/mm² = 15 × 39370.07874 inH₂O = 590551.1811 inH₂O
Reference conditions. inH₂O: Conventional water column: ρ = 1000 kg/m³ and gₙ = 9.80665 m/s² (≈ water at 4 °C).
Formula
inH₂O = kgf/mm² × 39370.07874016
Derivation from SI units:
- 1 kgf/mm² = 9.80665 N ÷ 1 mm² = 9.80665 MPa (exact)
- 1 inH₂O = 1000 kg/m³ × 9.80665 m/s² × 0.0254 m = 249.08891 Pa
- 1 kgf/mm² = 9806650 Pa ÷ 249.08891 Pa per inH₂O = 39370.07874016 inH₂O
Both units are defined exactly, so the factor is exact. Kilogram-force per Square Millimetre definition: kilogram-force per square millimetre; Inch of Water definition: inch of water.
Worked examples
- A reading of 24 kgf/mm² converts to 944881.8898 inH₂O.
24 kgf/mm² × 39370.07874 = 944881.8898 inH₂O - A value of 50 kgf/mm² is 1968503.937 inH₂O.
50 kgf/mm² × 39370.07874 = 1968503.937 inH₂O
Kilogram-force per Square Millimetre to Inch of Water conversion table
| Kilograms-force per Square Millimetre (kgf/mm²) | Inches of Water (inH₂O) |
|---|---|
| 1 kgf/mm² | 39370.07874 inH₂O |
| 5 kgf/mm² | 196850.3937 inH₂O |
| 10 kgf/mm² | 393700.7874 inH₂O |
| 20 kgf/mm² | 787401.5748 inH₂O |
| 24 kgf/mm² | 944881.8898 inH₂O |
| 30 kgf/mm² | 1181102.362 inH₂O |
| 36 kgf/mm² | 1417322.835 inH₂O |
| 40 kgf/mm² | 1574803.15 inH₂O |
| 50 kgf/mm² | 1968503.937 inH₂O |
| 60 kgf/mm² | 2362204.724 inH₂O |
| 80 kgf/mm² | 3149606.299 inH₂O |
| 100 kgf/mm² | 3937007.874 inH₂O |
| 120 kgf/mm² | 4724409.449 inH₂O |
Where it's used
Kilograms-force per Square Millimetre are used for tensile strength in older JIS and GB steel standards, while inches of water appear in HVAC total external static pressure (residential ≈ 0.5 inH₂O). Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.
Kilogram-force per Square Millimetre to other pressure units
| Conversion | 1 kgf/mm² equals |
|---|---|
| kilogram-force per square millimetre to inch of water | 39370.07874 inH₂O |
| kilogram-force per square millimetre to pascal | 9806650 Pa |
| kilogram-force per square millimetre to kilopascal | 9806.65 kPa |
| kilogram-force per square millimetre to ksi | 1.422334331 ksi |
| kilogram-force per square millimetre to kilogram-force per square centimetre | 100 kgf/cm² |
| kilogram-force per square millimetre to psi | 1422.334331 psi |
| kilogram-force per square millimetre to bar | 98.0665 bar |
| kilogram-force per square millimetre to millimeter of mercury | 73555.91353 mmHg |
Show 12 more units
| kilogram-force per square millimetre to atmosphere | 96.78411054 atm |
|---|---|
| kilogram-force per square millimetre to megapascal | 9.80665 MPa |
| kilogram-force per square millimetre to gigapascal | 0.00980665 GPa |
| kilogram-force per square millimetre to newton per square millimetre | 9.80665 N/mm² |
| kilogram-force per square millimetre to millibar | 98066.5 mbar |
| kilogram-force per square millimetre to torr | 73555.92401 Torr |
| kilogram-force per square millimetre to millimeter of water | 1000000 mmH₂O |
| kilogram-force per square millimetre to centimeter of water | 100000 cmH₂O |
| kilogram-force per square millimetre to inch of mercury | 2895.902107 inHg |
| kilogram-force per square millimetre to decibar | 980.665 dbar |
| kilogram-force per square millimetre to inch of water (60 °F) | 39409.45989 inH₂O (60 °F) |
| kilogram-force per square millimetre to barye | 98066500 Ba |
Frequently asked questions
How many inches of water are in 1 kilogram-force per square millimetre?
1 kgf/mm² = 39370.07874 inH₂O.
How do I convert kilograms-force per square millimetre to inches of water?
Multiply the value in kgf/mm² by 39370.07874. For example, 15 kgf/mm² × 39370.07874 = 590551.1811 inH₂O.
Is the kgf/mm² to inH₂O conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "kilogram-force per square millimeter".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "inch of water, conventional (inH2O)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Kilograms-force per Square Millimetre to inH₂O. Retrieved October 25, 2026, from https://scientificconverters.com/pressure/kilogram-force-per-square-millimeter-to-inch-of-water/
IEEE
Scientific Converters, "Convert Kilograms-force per Square Millimetre to inH₂O," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/pressure/kilogram-force-per-square-millimeter-to-inch-of-water/