Convert inHg to hPa

1 inHg equals about

33.86 hPa

How to Convert Inches of Mercury to Hectopascals

Inches of mercury (inHg) is the unit traditionally used in American meteorology and aviation to report atmospheric pressure and altimeter settings, while the hectopascal (hPa) is the standard unit used by most of the rest of the world for the same purpose, numerically identical to the millibar.

The Conversion Formula

To convert a measurement from inHg to hPa, simply multiply the value by 33.8639:

To convert from hPa to inHg, perform the inverse operation, dividing by 33.8639:

Practical Examples

• 29.92 inHg ≈ 1,013.25 hPa (standard atmospheric pressure)
• 30.00 inHg ≈ 1,015.92 hPa
• 29.50 inHg ≈ 998.99 hPa (typical of a low-pressure weather system)
• 30.50 inHg ≈ 1,032.85 hPa (typical of a high-pressure weather system)

When This Conversion Is Needed

This conversion is essential for pilots, meteorologists, and weather enthusiasts comparing American weather reports and altimeter settings (in inHg) with international weather data and barometers (in hPa), which is the standard used by most countries outside North America.

Other Pressure Conversions

• • Convert psi to bar
• • Convert bar to psi
• • Convert psi to kPa
• • Convert psi to Pascal
• • Tire Pressure: psi to bar
• • Blood Pressure mmHg Explained

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