Convert Kilograms-force per Square Millimetre to psi
1 kilogram-force per square millimetre (kgf/mm²) = 1422.334331 psi. 1 psi = 0.0007030695796 kgf/mm². Example: 15 kgf/mm² = 15 × 1422.334331 = 21335.01496 psi.
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1 kgf/mm² = 1422.334331 psi
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilogram-force per square millimetre to psi converter to paste a column from Excel.
How to Convert Kilogram-force per Square Millimetre to psi
- 1 kgf/mm² = 1422.334331 psi
- 1 psi = 0.0007030695796 kgf/mm²
- Example: convert 15 kgf/mm² to psi: 15 kgf/mm² = 15 × 1422.334331 psi = 21335.01496 psi
Formula
psi = kgf/mm² × 1422.334330712
Derivation from SI units:
- 1 kgf/mm² = 9.80665 N ÷ 1 mm² = 9.80665 MPa (exact)
- 1 psi = 1 lbf/in² = (0.45359237 kg × 9.80665 m/s²) ÷ (0.0254 m)² = 6894.757293168 Pa
- 1 kgf/mm² = 9806650 Pa ÷ 6894.757293168 Pa per psi = 1422.334330712 psi
Both units are defined exactly, so the factor is exact. Kilogram-force per Square Millimetre definition: kilogram-force per square millimetre; psi definition: psi.
Worked examples
- A reading of 24 kgf/mm² converts to 34136.02394 psi.
24 kgf/mm² × 1422.334331 = 34136.02394 psi - A value of 50 kgf/mm² is 71116.71654 psi.
50 kgf/mm² × 1422.334331 = 71116.71654 psi
Kilogram-force per Square Millimetre to psi conversion table
| Kilograms-force per Square Millimetre (kgf/mm²) | psi |
|---|---|
| 1 kgf/mm² | 1422.334331 psi |
| 5 kgf/mm² | 7111.671654 psi |
| 10 kgf/mm² | 14223.34331 psi |
| 20 kgf/mm² | 28446.68661 psi |
| 24 kgf/mm² | 34136.02394 psi |
| 30 kgf/mm² | 42670.02992 psi |
| 36 kgf/mm² | 51204.03591 psi |
| 40 kgf/mm² | 56893.37323 psi |
| 50 kgf/mm² | 71116.71654 psi |
| 60 kgf/mm² | 85340.05984 psi |
| 80 kgf/mm² | 113786.7465 psi |
| 100 kgf/mm² | 142233.4331 psi |
| 120 kgf/mm² | 170680.1197 psi |
Where it's used
Kilograms-force per Square Millimetre are used for tensile strength in older JIS and GB steel standards, while psi appear in tyre pressure in the United States (about 30–35 psi for cars). 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 psi | 1422.334331 psi |
| 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 bar | 98.0665 bar |
| kilogram-force per square millimetre to millimeter of mercury | 73555.91353 mmHg |
| kilogram-force per square millimetre to inch of water | 39370.07874 inH₂O |
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 psi are in 1 kilogram-force per square millimetre?
1 kgf/mm² = 1422.334331 psi.
How do I convert kilograms-force per square millimetre to psi?
Multiply the value in kgf/mm² by 1422.334331. For example, 15 kgf/mm² × 1422.334331 = 21335.01496 psi.
Is the kgf/mm² to psi 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, "pound-force per square inch (psi)".
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 psi. Retrieved October 25, 2026, from https://scientificconverters.com/pressure/kilogram-force-per-square-millimeter-to-psi/
IEEE
Scientific Converters, "Convert Kilograms-force per Square Millimetre to psi," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/pressure/kilogram-force-per-square-millimeter-to-psi/