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Convert Inch of Mercury to Pound per Square Inch instantly. Quick and accurate pressure conversion for engineering, automotive, and scientific applications.

What is the inHg to psi Converter?

This tool converts Inch of Mercury (inHg) to Pound per Square Inch (psi) quickly and accurately. Whether you work with tire pressure, hydraulic systems, or scientific measurements, it delivers instant results right in your browser.

Conversion formula: psi = inHg × 0.491154. To reverse it: inHg = psi × 2.0360.

Understanding the Units

Inch of Mercury (inHg)

Mercury-column unit common in US weather reports and aviation altimeters.

Pound per Square Inch (psi)

Common US pressure unit for tire pressure, hydraulics, and industrial applications.

Who Uses This Conversion?

Engineers

Convert pressure specifications between measurement systems with confidence.

Automotive Technicians

Work with tire and hydraulic pressure across different unit systems.

Scientists & Students

Convert pressure data for research, experiments, and coursework.

How to Convert inHg to psi

1

Enter the inHg Value

Type your Inch of Mercury value into the first input field.

2

Read the psi Result

The Pound per Square Inch result appears instantly in the second field as you type.

3

Copy the Result

Click the copy button to copy the converted value to your clipboard.

Reverse Conversion

Need to convert psi back to inHg? Click the swap button (↔) to reverse the direction, or type directly in the psi field.

Tips for Accurate Conversions

  • Use decimal points for precise values (e.g., 14.7 instead of 15).
  • Large numbers are formatted automatically with thousand separators.
  • Results update instantly as you type — no convert button needed.

Features

Instant Conversion

Results appear as you type, using precise conversion factors for accuracy.

Bidirectional Input

Type in either field and the other updates automatically.

Copy Results

Copy any value with one click for documents, emails, or reports.

Quick Reference Table

See common inHg-to-psi conversions at a glance.

Many Pressure Units

Switch between Pascal, Bar, PSI, atm, Torr, mmHg, and more from the dropdowns.

Mobile Friendly

Works on desktop, tablet, and mobile — convert anywhere.

Privacy by design: all calculations run locally in your browser. Nothing is uploaded to any server.

Common inHg to psi Values

Inch of Mercury (inHg)Pound per Square Inch (psi)
1 inHg0.4912 psi
5 inHg2.46 psi
10 inHg4.91 psi
20 inHg9.82 psi
50 inHg24.56 psi
100 inHg49.12 psi

Frequently Asked Questions

How do I convert inHg to psi?

Multiply the inHg value by 0.491154. For example, 1 inHg = 0.491154 psi.

What is the formula for inHg to psi?

The formula is psi = inHg × 0.491154. To convert back: inHg = psi × 2.0360.

Is this converter accurate?

Yes. It uses internationally recognized conversion factors with high precision, suitable for engineering and scientific work.

Can I convert other pressure units?

Yes. Use the dropdown menus to choose from many units including Pascal (Pa), Bar, PSI, atm, Torr, mmHg, inHg, and more.

Does it work offline?

Once the page loads, every calculation happens in your browser. You only need an internet connection for the initial page load.

inHg
psi

Common Conversions

1 inHg=0.4912 psi
5 inHg=2.46 psi
10 inHg=4.91 psi
20 inHg=9.82 psi
50 inHg=24.56 psi
100 inHg=49.12 psi

Inch of Mercury (inHg)

Mercury-column unit common in US weather reports and aviation altimeters.

Pound per Square Inch (psi)

Common US pressure unit for tire pressure, hydraulics, and industrial applications.

Enter a value in inHg to convert to PSI
Click the swap button (↔) to reverse the conversion
Use the copy button to copy the result
All calculations run locally - your data stays private
Want to learn more? Read documentation →
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