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mmHg to PSI

Convert mmHg to psi quickly with this free online calculator. The page explains the conversion rule, gives practical examples and provides a quick reference table.

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CONVERTED RESULT—
Decimal places
CONVERSION RULE

1 mmHg equals approximately 0.0193368 psi.

How to use the mmHg to PSI

  1. Enter the number you want to convert.
  2. Confirm the source unit shown beside the input.
  3. Choose decimal precision if you need more or less detail.
  4. Read the converted result.
  5. Copy the result when you need to use it elsewhere.

How the conversion works

1 mmHg equals approximately 0.0193368 psi.

For a simple fixed-factor conversion, the calculator multiplies the entered value by the stated factor. Temperature scales and certain specialized tools use their specific mathematical relationship instead.

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Common mmHg to psi conversions

mmHgpsi
1 mmHg0.019337 psi
2 mmHg0.038674 psi
5 mmHg0.096684 psi
10 mmHg0.193368 psi
20 mmHg0.386735 psi
50 mmHg0.966839 psi

Example

For example, entering 1 mmHg gives approximately 0.019337 psi using the rule above. Change the input to test your own value.

Frequently asked questions

The mmHg to PSI converts a value from mmHg to psi using the conversion relationship described on this page.
Enter your value, review the source and destination units, choose the decimal precision and read or copy the result.
1 mmHg equals approximately 0.0193368 psi.
Use enough precision for your purpose. Everyday estimates usually need fewer decimal places; technical work may require more.
It can be a useful reference calculation, but safety-critical, regulated, contractual or specialized work should be verified against the applicable authoritative standard.

Accuracy note: This calculator is a practical reference. For regulated, safety-critical or specialized work, verify the result against the applicable standard.

Page reviewed: August 24, 2026.