Convert Newtons per Square Millimetre to Inches of Mercury
1 newton per square millimetre (N/mm²) = 295.299833 inches of mercury (inHg). 1 inHg = 0.00338638864 N/mm². Example: 15 N/mm² = 15 × 295.299833 = 4429.497495 inHg.
Also searched as newtons per square millimetre to inHg, newtons per square millimetre in inHg, newtons per square millimetre into inches of mercury, N/mm2 to inHg, N/mm2 in inches of mercury, N/mm2 into inch of mercury, newton per square millimetre to inch of mercury, N/mm2 to inches of mercury converter, newtons per square millimeter to inches of mercury and how many inches of mercury in a newton per square millimetre.
1 N/mm² = 295.299833 inHg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk newton per square millimetre to inch of mercury converter to paste a column from Excel.
How to Convert Newton per Square Millimetre to Inch of Mercury
- 1 N/mm² = 295.299833 inHg
- 1 inHg = 0.00338638864 N/mm²
- Example: convert 15 N/mm² to inHg: 15 N/mm² = 15 × 295.299833 inHg = 4429.497495 inHg
Reference conditions. inHg: Conventional mercury column: ρ = 13 595.1 kg/m³ and gₙ = 9.80665 m/s² (≈ mercury at 0 °C / 32 °F).
Formula
inHg = N/mm² × 295.2998330101
Derivation from SI units:
- 1 N/mm² = 1 N ÷ 10⁻⁶ m² = 10⁶ Pa = 1 MPa
- 1 inHg = 13 595.1 kg/m³ × 9.80665 m/s² × 0.0254 m = 3386.388640341 Pa
- 1 N/mm² = 1000000 Pa ÷ 3386.388640341 Pa per inHg = 295.2998330101 inHg
Both units are defined exactly, so the factor is exact. Newton per Square Millimetre definition: newton per square millimetre; Inch of Mercury definition: inch of mercury.
Worked examples
- A reading of 30 N/mm² converts to 8858.99499 inHg.
30 N/mm² × 295.299833 = 8858.99499 inHg - A value of 275 N/mm² is 81207.45408 inHg.
275 N/mm² × 295.299833 = 81207.45408 inHg
Newton per Square Millimetre to Inch of Mercury conversion table
| Newtons per Square Millimetre (N/mm²) | Inches of Mercury (inHg) |
|---|---|
| 1 N/mm² | 295.299833 inHg |
| 10 N/mm² | 2952.99833 inHg |
| 20 N/mm² | 5905.99666 inHg |
| 25 N/mm² | 7382.495825 inHg |
| 30 N/mm² | 8858.99499 inHg |
| 40 N/mm² | 11811.99332 inHg |
| 100 N/mm² | 29529.9833 inHg |
| 235 N/mm² | 69395.46076 inHg |
| 275 N/mm² | 81207.45408 inHg |
| 355 N/mm² | 104831.4407 inHg |
| 400 N/mm² | 118119.9332 inHg |
| 500 N/mm² | 147649.9165 inHg |
| 1000 N/mm² | 295299.833 inHg |
Where it's used
Newtons per Square Millimetre are used for steel yield and tensile strength (S355: 355 N/mm²), while inches of mercury appear in aircraft altimeter settings (standard 29.92 inHg). Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.
Newton per Square Millimetre to other pressure units
| Conversion | 1 N/mm² equals |
|---|---|
| newton per square millimetre to inch of mercury | 295.299833 inHg |
| newton per square millimetre to pascal | 1000000 Pa |
| newton per square millimetre to kilopascal | 1000 kPa |
| newton per square millimetre to ksi | 0.1450377377 ksi |
| newton per square millimetre to kilogram-force per square centimetre | 10.19716213 kgf/cm² |
| newton per square millimetre to psi | 145.0377377 psi |
| newton per square millimetre to bar | 10 bar |
| newton per square millimetre to millimeter of mercury | 7500.615758 mmHg |
Show 12 more units
| newton per square millimetre to inch of water | 4014.63076 inH₂O |
|---|---|
| newton per square millimetre to atmosphere | 9.869232667 atm |
| newton per square millimetre to megapascal | 1 MPa |
| newton per square millimetre to gigapascal | 0.001 GPa |
| newton per square millimetre to kilogram-force per square millimetre | 0.1019716213 kgf/mm² |
| newton per square millimetre to millibar | 10000 mbar |
| newton per square millimetre to torr | 7500.616827 Torr |
| newton per square millimetre to millimeter of water | 101971.6213 mmH₂O |
| newton per square millimetre to centimeter of water | 10197.16213 cmH₂O |
| newton per square millimetre to decibar | 100 dbar |
| newton per square millimetre to inch of water (60 °F) | 4018.64652 inH₂O (60 °F) |
| newton per square millimetre to barye | 10000000 Ba |
Frequently asked questions
How many inches of mercury are in 1 newton per square millimetre?
1 N/mm² = 295.299833 inHg.
How do I convert newtons per square millimetre to inches of mercury?
Multiply the value in N/mm² by 295.299833. For example, 15 N/mm² × 295.299833 = 4429.497495 inHg.
Is the N/mm² to inHg 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
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4, coherent derived units with special names.
- 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 mercury, conventional (inHg)".
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 Newtons per Square Millimetre to Inches of Mercury. Retrieved October 25, 2026, from https://scientificconverters.com/pressure/newton-per-square-millimeter-to-inch-of-mercury/
IEEE
Scientific Converters, "Convert Newtons per Square Millimetre to Inches of Mercury," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/pressure/newton-per-square-millimeter-to-inch-of-mercury/