Convert Pascals to Inches of Mercury
1 pascal (Pa) equals 0.000295299833 inches of mercury (inHg).
1 Pa = 0.000295299833 inHg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pascal to inch of mercury converter to paste a column from Excel.
How to Convert Pascal to Inch of Mercury
- 1 Pa = 0.000295299833 inHg
- 1 inHg = 3386.38864 Pa
- Example: convert 15 Pa to inHg: 15 Pa = 15 × 0.000295299833 inHg = 0.004429497495 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 = Pa × 0.0002952998330101
or inHg = Pa ÷ 3386.388640341
Derivation from SI units:
- 1 Pa = 1 N/m² = 1 kg·m⁻¹·s⁻²
- 1 inHg = 13 595.1 kg/m³ × 9.80665 m/s² × 0.0254 m = 3386.388640341 Pa
Both units are defined exactly, so the factor is exact. Pascal definition: pascal; Inch of Mercury definition: inch of mercury.
Worked examples
- A reading of 125 Pa converts to 0.03691247913 inHg.
125 Pa × 0.000295299833 = 0.03691247913 inHg - A value of 1000 Pa is 0.295299833 inHg.
1000 Pa × 0.000295299833 = 0.295299833 inHg
Pascal to Inch of Mercury conversion table
| Pascals (Pa) | Inches of Mercury (inHg) |
|---|---|
| 1 Pa | 0.000295299833 inHg |
| 5 Pa | 0.001476499165 inHg |
| 10 Pa | 0.00295299833 inHg |
| 15 Pa | 0.004429497495 inHg |
| 25 Pa | 0.007382495825 inHg |
| 50 Pa | 0.01476499165 inHg |
| 75 Pa | 0.02214748748 inHg |
| 100 Pa | 0.0295299833 inHg |
| 125 Pa | 0.03691247913 inHg |
| 150 Pa | 0.04429497495 inHg |
| 200 Pa | 0.0590599666 inHg |
| 250 Pa | 0.07382495825 inHg |
| 300 Pa | 0.0885899499 inHg |
| 400 Pa | 0.1181199332 inHg |
| 500 Pa | 0.1476499165 inHg |
| 750 Pa | 0.2214748748 inHg |
| 1000 Pa | 0.295299833 inHg |
| 1500 Pa | 0.4429497495 inHg |
| 2000 Pa | 0.590599666 inHg |
| 2500 Pa | 0.7382495825 inHg |
| 5000 Pa | 1.476499165 inHg |
| 10000 Pa | 2.95299833 inHg |
| 50000 Pa | 14.76499165 inHg |
| 101325 Pa | 29.92125558 inHg |
Where it's used
Pascals are used for cleanroom and isolator pressure differentials (typically 10–50 Pa), 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.
Pascal to other pressure units
| Conversion | 1 Pa equals |
|---|---|
| pascal to kilopascal | 0.001 kPa |
| pascal to megapascal | 0.000001 MPa |
| pascal to psi | 0.0001450377377 psi |
| pascal to bar | 0.00001 bar |
| pascal to millibar | 0.01 mbar |
| pascal to decibar | 0.0001 dbar |
| pascal to torr | 0.007500616827 Torr |
| pascal to millimeter of mercury | 0.007500615758 mmHg |
| pascal to millimeter of water | 0.1019716213 mmH₂O |
| pascal to centimeter of water | 0.01019716213 cmH₂O |
| pascal to inch of water | 0.00401463076 inH₂O |
| pascal to inch of water (60 °F) | 0.00401864652 inH₂O (60 °F) |
| pascal to inch of mercury | 0.000295299833 inHg |
| pascal to atmosphere | 0.000009869232667 atm |
| pascal to barye | 10 Ba |
Frequently asked questions
How many inches of mercury are in 1 pascal?
1 Pa = 0.000295299833 inHg.
How do I convert pascals to inches of mercury?
Multiply the value in Pa by 0.000295299833, or divide it by 3386.38864. For example, 15 Pa × 0.000295299833 = 0.004429497495 inHg.
Is the Pa 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 Pascals to Inches of Mercury. Retrieved October 17, 2026, from https://scientificconverters.com/pressure/pascal-to-inch-of-mercury/
IEEE
Scientific Converters, "Convert Pascals to Inches of Mercury," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/pressure/pascal-to-inch-of-mercury/