Pascals to Inches Of Mercury
Convert pascals to inches of mercury instantly — one pascal is 0.0002953 inches of mercury.
| Pascals | Inches Of Mercury |
|---|---|
| 1 Pa | 0.000295 inHg |
| 2 Pa | 0.000591 inHg |
| 3 Pa | 0.000886 inHg |
| 5 Pa | 0.001476 inHg |
| 10 Pa | 0.002953 inHg |
| 25 Pa | 0.007382 inHg |
| 50 Pa | 0.014765 inHg |
| 100 Pa | 0.02953 inHg |
How to use
- Enter a value in the Pascals field.
- The Inches Of Mercury figure appears immediately — no button to press.
- Typing in the Inches Of Mercury field converts back to Pascals the same way.
- Use the reference table for the values that come up most often.
Pascals to Inches Of Mercury formula
The factor from pascals to inches of mercury is 0.000295299802.
inHg = Pa × 0.000295299802
Why this factor: the pascal and the inch of mercury are both defined against the pascal, so dividing one definition by the other gives 0.000295299802 directly. Both definitions are set out in full below.
To go the other way, divide by 0.000295299802 — or use the Inches Of Mercury to Pascals converter, which is the same calculation reversed.
Worked example
Take 760 Pa and multiply by the factor 0.000295299802: the result is 0.224428 inHg.
760 Pa × 0.000295299802 = 0.224428 inHg
The converter above does this for any value you type, in either direction.
What is a pascal?
The pascal is the SI unit of pressure — one newton of force spread over one square meter.
Definition: Defined as 1 N/m². Named after Blaise Pascal.
Where it is used: Scientific and engineering pressure calculations, and weather pressure in hectopascals.
Worth knowing: A single pascal is a very small pressure, which is why weather reports use hectopascals and engineering uses kilopascals.
What is an inch of mercury?
An inch of mercury is the pressure of a one-inch mercury column, used for US barometric pressure.
Definition: About 3,386.389 pascals.
Where it is used: US weather barometric pressure, aircraft altimeter settings, and engine vacuum readings.
Pascals vs Inches Of Mercury
The pascal is an SI unit while the inch of mercury is a US customary unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many inches of mercury are in a pascal?
One pascal equals 0.000295299802 inches of mercury.
What is the formula to convert pascals to inches of mercury?
Multiply the number of pascals by 0.000295299802. To reverse it, divide by 0.000295299802 instead.
How do I convert inches of mercury back to pascals?
Divide by 0.000295299802, which is the same as multiplying by 3386.389.
How many inches of mercury are in 10 pascals?
10 Pa works out to 0.002953 inHg.
Is there anything to watch out for with pascals?
A single pascal is a very small pressure, which is why weather reports use hectopascals and engineering uses kilopascals.
How is the pascal defined?
Defined as 1 N/m². Named after Blaise Pascal.