How do you convert pascals to inches of mercury?

To convert pascals (Pa) to inches of mercury (inHg), multiply the pressure in pascals by 0.00029529 (inches of mercury = pascals × 0.00029529).

What is 5 pascals in inches of mercury?

5 pascals (5 Pa) is equal to 0.00147649 inches of mercury (0.00147649 inHg).

Which is larger, 1 pascal (Pa) or 1 inch of mercury (inhg) (inHg)?

One inch of mercury (inhg) (inHg) is larger than one pascal (Pa). Specifically, 1 inHg equals 3,386.389 Pa, while 1 Pa is 0.00029529 inHg.

How do I convert back from inches of mercury (inHg) to pascals (Pa)?

To reverse the calculation from inHg to Pa, multiply your inch of mercury (inhg) value by the inverse factor 3,386.389 (or divide by 0.00029529). You can also click the Swap button in the tool above to flip directions in one click.

How many decimal places should I round Pa to inHg results to?

For everyday comparisons and quick estimates, rounding to 2 decimal places is usually sufficient (for example, 5 Pa ≈ 0.00 inHg). For engineering, laboratory, or machining specifications, select 4 or 6 decimals—or Scientific (10ⁿ) mode—in the calculator toolbar above.

Pascals to Inches of Mercury Converter

Enter the pressure in pascals below to convert it to inches of mercury.

Inches of Mercury to Pascals (inHg → Pa)

Convert Pascals to Inches of Mercury

Enter a value in pascals (Pa) to convert to inches of mercury (inHg).

Value (Pa)

From

Result

•

0.001476499inches of mercury

5 Pa = 0.001476499 inHg

Result updates automatically

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Equivalent Measurements Across UnitsFor 5 Pa

Kilopascals0.005 kPa

Bars0.00005 bar

PSI0.00072518 psi

Atmospheres0.00004934 atm

Suggested Conversions

Reference:NIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))

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Pascal to Inch of Mercury Conversion Table

Table showing various pascal measurements converted to inches of mercury. Click any preset value or arrow to load it into the converter.

Pascals (Pa)	Inches of Mercury (inHg)
1 Pa	0.0002953 inHg
2 Pa	0.0005906 inHg
2.5 Pa	0.00073825 inHg
5 Pa	0.0014765 inHg
10 Pa	0.002953 inHg
15 Pa	0.0044295 inHg
20 Pa	0.005906 inHg
25 Pa	0.0073825 inHg
30 Pa	0.008859 inHg
50 Pa	0.014765 inHg

How to Convert Pascals to Inches of Mercury

To convert pascals to inches of mercury, multiply the pressure by the following conversion ratio: 0.0002953 inches of mercury/pascal.

Since one pascal is equal to 0.0002953 inches of mercury, you can use this simple formula to convert:

inches of mercury = pascals × 0.0002953

The pressure in inches of mercury is equal to the pressure in pascals multiplied by 0.0002953.

For example, here's how to convert 5 pascals to inches of mercury using the formula above.

inches of mercury = (5 Pa × 0.0002953) = 0.0014765 inHg

How Many Inches of Mercury Are in a Pascal?

There are 0.0002953 inches of mercury in a pascal, which is why we use this value in the formula above.

1 Pa = 0.0002953 inHg|1 inHg = 3,386.389 Pa

Our pascal to inch of mercury calculator automatically converts your pressure measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

Pascals and inches of mercury are both units used to measure pressure. Keep reading to learn more about each unit.

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. [1]

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.

Learn more about pascals in our Pressure Converter.

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. [2]

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.

Learn more about inches of mercury in our Pressure Converter.

When converting pressure between pascals (Pa) and inches of mercury (inHg), keep full floating-point precision (1 Pa = 0.0002953 inHg; 1 inHg = 3,386.389 Pa) during intermediate calculations and round only the final inch of mercury figure to match your instrument tolerance.

More Pascal & Inch of Mercury Conversions

Need to calculate in the opposite direction? Use our inches of mercury to pascals calculator to switch your starting unit immediately. You can also explore related tools such as converting inches of mercury to pascals, converting hectopascals to inches of mercury, or converting pascals to hectopascals.

Convert from Pascals

Convert to Inches of Mercury

Frequently Asked Questions

There are 0.00029529 inches of mercury (inHg) in 1 pascal (Pa). Conversely, 1 inch of mercury (inHg) is equal to 3,386.389 pascals (Pa).

Pressure Converter

Quick Info

Direct Factor: 1 pascal (Pa) equals 0.00029529 inches of mercury (inHg).
Inverse Factor: 1 inch of mercury (inhg) (inHg) equals 3,386.389 pascals (Pa).
Formula: inches of mercury = pascals × 0.00029529.
Verified Precision: Anchored to official NIST SP 811 and ISO/IEC 80000 standards.

Units Comparison

Pascal (Pa)

SI derived unit of pressure equal to 1 Newton per square meter (N/m²).

Inch of Mercury (inHg) (inHg)

Aviation altimeter & weather barometer unit equal to 3,386.389 Pascals.

Kilopascal (kPa)

Equal to 1,000 Pascals (1 kN/m²).

References

[1]NIST SP 811 · NIST SP 811 App. B.9 (Pressure & Stress)
Source
[2]NIST CUU · Derived SI Unit: Pascal (Pa)
Source
[3]BIPM · SI Brochure (9th Ed.) — Mechanics
Source

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References

NIST · BIPM · ISO

[1]
NIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))·Pressure Metrology Standard — Pascals (Pa) to Inches of Mercury (inHg)
NIST SP 811 Standard
[2]
NIST CUU (Derived SI Unit: Pascal (Pa))·Unit Specifications: Pascal (Pa) & Inch of Mercury (inHg) (inHg)
NIST CUU Specification
[3]
BIPM (SI Brochure (9th Ed.) — Mechanics)·Conversion Factors & Mathematical Basis (Pa to inHg)
BIPM Reference

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