Pascals to Psi (Pa to psi)

Formula

1 Pa = 0.000145038 psi

psi = pascals × 0.0001450377377 — reverse: pascals = psi × 6894.757293

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 Pa = 0.000725189 psi
• 12.5 Pa = 0.00181297 psi
• 100 Pa = 0.0145038 psi

Pascals to psi conversion table

FAQ

How many psi are in one pascal?

1 Pa = 0.000145038 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 pascals to psi?

Multiply the value in pascals by 0.0001450377377: psi = pascals × 0.0001450377377. For example, 5 Pa = 0.000725189 psi.

How do I convert psi back to pascals?

Multiply by the inverse factor 6894.757293 (pascals = psi × 6894.757293), or use the psi-to-pascals page.

Related conversions

• Psi to pascals (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=Pa&to_unit=psi
• MCP: server https://tttkmbb.com/mcp, tool convert_units with {"value":5,"from_unit":"Pa","to_unit":"psi"}
• Markdown: https://tttkmbb.com/conversion/pa-to-psi.md · JSON: https://tttkmbb.com/conversion/pa-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)