Fidamen

Convert Pascals to PSI - Pressure Converter

This tool converts pressure values expressed in kilopascals (kPa) to pounds per square inch (psi). Use it when you need a reliable numeric conversion between SI-derived pressure units and common imperial units used in automotive, HVAC, and industrial contexts.

The calculator assumes numeric input is a pressure value in kilopascals. It does not infer whether the value is gauge or absolute pressure; confirm the measurement reference (gauge vs absolute) before converting for safety-critical or regulatory applications.

Updated Nov 18, 2025QA PASS — golden 25 / edge 120Run golden-edge-2026-01-23

Governance

Record ebd50aa97815 • Reviewed by Fidamen Standards Committee

Interactive Converter

Convert between kilopascal and psi (pounds per square inch) with precision rounding.

Quick reference table

KilopascalPSI (Pounds per Square Inch)
KPA 1.00 kPaPSI 0.15 psi
KPA 5.00 kPaPSI 0.73 psi
KPA 10.00 kPaPSI 1.45 psi
KPA 25.00 kPaPSI 3.63 psi
KPA 50.00 kPaPSI 7.25 psi
KPA 100.00 kPaPSI 14.50 psi

Methodology

This conversion uses a fixed multiplicative relationship between the two unit systems. No empirical calibration factors or sensor-specific corrections are applied by the converter.

For measurement and reporting that require traceability or compliance, follow recommended practices for instrument calibration and uncertainty reporting as described by NIST and ISO standards referenced below.

Key takeaways

Multiply kPa by 0.14503773773 to get psi, or divide by 6.894757293168 to go the other way.

Confirm whether your input is gauge or absolute pressure before converting for applications where reference matters, and follow calibration and uncertainty reporting standards for regulated or safety-critical work.

Worked examples

100 kPa → 14.5038 psi (100 × 0.14503773773 ≈ 14.5038)

220 kPa → 31.9083 psi (220 × 0.14503773773 ≈ 31.9083)

101.325 kPa (standard atmospheric pressure) → 14.6959 psi

F.A.Q.

Is the conversion factor exact?

The conversion is a fixed mathematical relationship based on defined SI and imperial unit definitions. The numeric factor shown is sufficient for typical engineering and everyday use. For laboratory-grade reporting include measurement uncertainty and instrument traceability per NIST and ISO guidance.

How do I handle gauge versus absolute pressure?

Kilopascal readings may be gauge (relative to ambient) or absolute (relative to vacuum). This converter treats the numeric input as whatever the instrument reports. To convert between gauge and absolute, add or subtract local atmospheric pressure (approximately 101.325 kPa at sea level) before converting if needed.

What rounding or precision should I use?

Select rounding based on the measuring device's accuracy and the required uncertainty reporting. For example, tire pressure is commonly reported to one decimal place in psi; laboratory work may require more significant figures and an uncertainty statement conforming to ISO 17025.

Can I use this for safety-critical calculations?

This converter provides the numeric unit conversion only. For safety-critical applications verify instrument calibration, measurement conditions, and applicable regulatory requirements. Follow calibration and competence standards such as ISO 17025 and ISO 10012, and any industry-specific OSHA guidance.

Why do I sometimes see pressure given in bar or Pa?

Bar and pascal (Pa) are common metric pressure units. 1 bar = 100 kPa. The pascal is the SI base unit of pressure (1 kPa = 1000 Pa). Convert between these as intermediate steps if required.

Sources & citations

Further resources

Versioning & Change Control

Audit record (versions, QA runs, reviewer sign-off, and evidence).

Record ID: ebd50aa97815

What changed (latest)

v1.0.0 • 2025-11-18 • MINOR

Initial publication and governance baseline.

Why: Published with reviewed formulas, unit definitions, and UX controls.

Public QA status

PASS — golden 25 + edge 120

Last run: 2026-01-23 • Run: golden-edge-2026-01-23

Engine

v1.0.0

Data

Baseline (no external datasets)

Content

v1.0.0

UI

v1.0.0

Governance

Last updated: Nov 18, 2025

Reviewed by: Fidamen Standards Committee (Review board)

Credentials: Internal QA

Risk level: low

Reviewer profile (entity)

Fidamen Standards Committee

Review board

Internal QA

Entity ID: https://fidamen.com/reviewers/fidamen-standards-committee#person

Semantic versioning

  • MAJOR: Calculation outputs can change for the same inputs (formula, rounding policy, assumptions).
  • MINOR: New features or fields that do not change existing outputs for the same inputs.
  • PATCH: Bug fixes, copy edits, or accessibility changes that do not change intended outputs except for previously incorrect cases.

Review protocol

  • Verify formulas and unit definitions against primary standards or datasets.
  • Run golden-case regression suite and edge-case suite.
  • Record reviewer sign-off with credentials and scope.
  • Document assumptions, limitations, and jurisdiction applicability.

Assumptions & limitations

  • Uses exact unit definitions from the Fidamen conversion library.
  • Internal calculations use double precision; display rounding follows the unit's configured decimal places.
  • Not a substitute for calibrated instruments in regulated contexts.
  • Jurisdiction-specific rules may require official guidance.

Change log

v1.0.0 • 2025-11-18 • MINOR

Initial publication and governance baseline.

Why: Published with reviewed formulas, unit definitions, and UX controls.

Areas: engine, content, ui • Reviewer: Fidamen Standards Committee • Entry ID: ced104a21774