Inches of Mercury to Pascals Converter
Enter the pressure in inches of mercury below to convert it to pascals.
Convert Inches of Mercury to Pascals
Enter a value in inches of mercury (inHg) to convert to pascals (Pa).
Inch of Mercury to Pascal Conversion Table
Table showing various inch of mercury measurements converted to pascals. Click any preset value or arrow to load it into the converter.
| Inches of Mercury (inHg) | Pascals (Pa) |
|---|---|
| 1 inHg | 3,386.389 Pa |
| 2 inHg | 6,772.778 Pa |
| 2.5 inHg | 8,465.9725 Pa |
| 5 inHg | 16,931.945 Pa |
| 10 inHg | 33,863.89 Pa |
| 15 inHg | 50,795.835 Pa |
| 20 inHg | 67,727.78 Pa |
| 25 inHg | 84,659.725 Pa |
| 30 inHg | 101,591.67 Pa |
| 50 inHg | 169,319.45 Pa |
How to Convert Inches of Mercury to Pascals
To convert inches of mercury to pascals, multiply the pressure by the following conversion ratio: 3,386.389 pascals/inch of mercury.
Since one inch of mercury is equal to 3,386.389 pascals, you can use this simple formula to convert:
The pressure in pascals is equal to the pressure in inches of mercury multiplied by 3,386.389.
For example, here's how to convert 5 inches of mercury to pascals using the formula above.
How Many Pascals Are in an Inch of Mercury?
There are 3,386.389 pascals in an inch of mercury, which is why we use this value in the formula above.
Our inch of mercury to pascal calculator automatically converts your pressure measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Inches of Mercury and pascals are both units used to measure pressure. Keep reading to learn more about each unit.
What Is an Inch of Mercury?
An inch of mercury is a unit of pressure equal to 3,386.389 pascals (Pa), the base unit for pressure. Aviation altimeter & weather barometer unit equal to 3,386.389 Pascals. [1]
The inch of mercury is classified as a US customary unit of pressure. Inches of Mercury can be abbreviated as inHg; for example, 1 inch of mercury can be written as 1 inHg.
When working with inches of mercury (inHg) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, inches of mercury (inHg) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within US customary workflows, engineering documentation, and technical data sheets.
What Is a Pascal?
SI derived unit of pressure equal to 1 Newton per square meter (N/m²). It serves as a primary reference unit for measuring pressure across scientific and practical applications. [2]
The pascal is classified as an International System of Units (SI) unit of pressure. Pascals can be abbreviated as Pa; for example, 1 pascal can be written as 1 Pa.
As the primary coherent reference unit for pressure in this category, all other pressure units are mathematically anchored to the pascal (Pa).
In practice, pascals (Pa) are widely used across standard pressure applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
When converting pressure between inches of mercury (inHg) and pascals (Pa), keep full floating-point precision (1 inHg = 3,386.389 Pa; 1 Pa = 0.0002953 inHg) during intermediate calculations and round only the final pascal figure to match your instrument tolerance.
More Inch of Mercury & Pascal Conversions
Need to calculate in the opposite direction? Use our pascals to inches of mercury calculator to switch your starting unit immediately. You can also explore related tools such as converting pascals to inches of mercury, converting hectopascals to pascals, or converting megapascals to pascals.
Convert from Inches of Mercury
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))·Pressure Metrology Standard — Inches of Mercury (inHg) to Pascals (Pa)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Pascal (Pa))·Unit Specifications: Inch of Mercury (inHg) (inHg) & Pascal (Pa)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Mechanics)·Conversion Factors & Mathematical Basis (inHg to Pa)