Convert Pascals to Inches of mercury
1 pascal is 0.000295 inHg. One pascal is exactly 0.000295299801647 inches of mercury.
One pascal is 2.9530 × 10^-4 inches of mercury. To convert pascals to inches of mercury, multiply by 2.9530 × 10^-4; to go the other way, divide by 2.9530 × 10^-4 or multiply by 3386.389. The factor is exact rather than rounded: it follows from NIST Special Publication 811. The SI unit: one newton spread over one square metre.
Factor checked against the defining standard · How we check
- Pascals × 2.9530 × 10^-4
value * 0.0002952998016470 inHg
1 pascal in every pressure unit
| Unit | Value | Exact factor |
|---|---|---|
| pounds per square inch | 0.0001450377377 psi | × 0.00014503773773 |
| bars | 0.00001 bar | × 0.00001 |
| pascals (as entered) | 1 Pa | — |
| kilopascals | 0.001 kPa | × 0.001 |
| megapascals | 0.000001 MPa | × 0.000001 |
| atmospheres | 0.000009869232667 atm | × 0.00000986923266716 |
| torr | 0.007500616827 Torr | × 0.00750061682704 |
| inches of mercury | 0.0002952998016 inHg | × 0.000295299801647 |
Factors are entered by hand from NIST Special Publication 811 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert pascals to inches of mercury?
- 1.Take the measurement in pascals.
- 2.Multiply by 2.9530 × 10^-4 — that is how many inches of mercury fit in one pascal.
- 3.To go back the other way, divide by 2.9530 × 10^-4, or multiply by 3386.389.
Worked example: 25 pascals to inches of mercury
- Formula
- Pa × 2.9530 × 10^-4 = inHg
- Arithmetic
- 25 × 2.9530 × 10^-4 = 0.007382 inHg
- Answer
- 25 Pa = 0.007382 inHg
The factor is rounded for display; the figure above is computed from the full value.
Pascals to inches of mercury conversion table
| Pascals | Inches of mercury |
|---|---|
| 1 Pa | 0.000295 inHg |
| 2 Pa | 0.000591 inHg |
| 3 Pa | 0.000886 inHg |
| 4 Pa | 0.001181 inHg |
| 5 Pa | 0.001476 inHg |
| 6 Pa | 0.001772 inHg |
| 7 Pa | 0.002067 inHg |
| 8 Pa | 0.002362 inHg |
| 9 Pa | 0.002658 inHg |
| 10 Pa | 0.002953 inHg |
| 12 Pa | 0.003544 inHg |
| 15 Pa | 0.004429 inHg |
| 20 Pa | 0.005906 inHg |
| 25 Pa | 0.007382 inHg |
| 50 Pa | 0.014765 inHg |
| 100 Pa | 0.02953 inHg |
| 200 Pa | 0.05906 inHg |
| 300 Pa | 0.08859 inHg |
| 500 Pa | 0.14765 inHg |
| 1000 Pa | 0.2953 inHg |
| 2000 Pa | 0.5906 inHg |
| 5000 Pa | 1.476499 inHg |
| 10000 Pa | 2.952998 inHg |
What is a pascal?
The SI unit: one newton spread over one square metre. It is a small pressure — a sheet of paper resting on a table is about one pascal — which is why the kilopascal is what instruments actually read.
What is an inch of mercury?
The pressure of a one-inch column of mercury at 0 °C, fixed by convention at 3,386.389 pascals. US aviation altimeters and barometers read in it.
How many inches of mercury are in a pascal?
One pascal is 2.9530 × 10^-4 inches of mercury. Going the other way, one inch of mercury is 3386.389 pascals. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every pressure unit here
| Unit | Symbol | One of these is |
|---|---|---|
| Pounds per square inch | psi | 6894.7573 pascal |
| Bars | bar | 100000 pascal |
| Pascals | Pa | the base unit |
| Kilopascals | kPa | 1000 pascal |
| Megapascals | MPa | 1000000 pascal |
| Atmospheres | atm | 101325 pascal |
| Torr | Torr | 133.32237 pascal |
| Inches of mercury | inHg | 3386.389 pascal |
Questions people actually ask
- How many inches of mercury are in a pascal?
- 2.9530 × 10^-4. The pressure of a one-inch column of mercury at 0 °C, fixed by convention at 3,386.389 pascals. US aviation altimeters and barometers read in it.
- How do I convert inches of mercury back to pascals?
- Divide by 2.9530 × 10^-4, or multiply by 3386.389 — they are the same operation.
Other pressure conversions
Inches of mercury to pascals — the same conversion the other way.