Millimeters of mercury to Psi (mmHg to psi)

Formula

1 mmHg = 0.0193368 psi

psi = millimeters of mercury × 0.01933677746 — reverse: millimeters of mercury = psi × 51.7149252

The factor is derived from the SI definitions of both units (base unit: Pa) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.

Worked examples

• 5 mmHg = 0.0966839 psi
• 12.5 mmHg = 0.24171 psi
• 100 mmHg = 1.93368 psi

Millimeters of mercury to psi conversion table

FAQ

How many psi are in one millimeter of mercury?

1 mmHg = 0.0193368 psi. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.

What is the formula to convert millimeters of mercury to psi?

Multiply the value in millimeters of mercury by 0.01933677746: psi = millimeters of mercury × 0.01933677746. For example, 5 mmHg = 0.0966839 psi.

How do I convert psi back to millimeters of mercury?

Multiply by the inverse factor 51.7149252 (millimeters of mercury = psi × 51.7149252), or use the psi-to-millimeters of mercury page.

Related conversions

• Psi to millimeters of mercury (reverse)
• Pressure Converter — all pressure units in one tool
• Psi to Bar
• Bar to Psi
• Psi to Kilopascals
• Kilopascals to Psi
• Bar to Kilopascals
• Kilopascals to Bar
• Atmospheres to Pascals
• Pascals to Atmospheres

Machine access

• API: GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=mmHg&to_unit=psi
• MCP: server https://tttkmbb.com/mcp, tool convert_units with {"value":5,"from_unit":"mmHg","to_unit":"psi"}
• Markdown: https://tttkmbb.com/conversion/mmhg-to-psi.md · JSON: https://tttkmbb.com/conversion/mmhg-to-psi.json (add ?value= for a result) · Units: /api/v1/units?quantity=pressure
• OpenAPI operationId: convert_units. Freshness: static. Authentication: none.

Sources

• NIST Special Publication 811 – Guide for the Use of the International System of Units (SI), Appendix B conversion factors (standard)
• BIPM – The International System of Units (SI Brochure, 9th edition) (standard)
• Wikipedia – Conversion of units (reference)