Pressure Converter

How to use the Pressure Converter

Convert common engineering, automotive, laboratory, and atmospheric pressure units using standard factors.

Convert pressure among pascals, kilopascals, bars, atmospheres, pounds per square inch, and related units. The tool preserves the distinction between unit conversion and gauge-reference interpretation.

The conversion runs locally using the stated factors or formulas. Keep enough precision for the task and verify regulated or engineering work against its controlling standard.

1. Enter the pressure measurement.
2. Choose the current and desired units.
3. Fieldlet converts through pascals and displays the equivalent value.

Last reviewed for accuracy: 2026-08-31

Worked examples

How the result is produced

Values are converted through pascals, the SI pressure unit. The numeric factor does not indicate whether a measurement is absolute pressure or gauge pressure relative to ambient conditions.

• 1 pascal = 1 newton per square meter
• 1 standard atmosphere = exactly 101,325 pascals
• Gauge and absolute pressure need the same reference before comparison

Unit conversion does not change the pressure reference

A pressure reading needs both a numeric unit and a reference. Gauge pressure is measured relative to local atmosphere, while absolute pressure is measured relative to a vacuum. Converting PSI to kilopascals does not infer or change that reference.

• 1 standard atmosphere = exactly 101,325 pascals.
• 1 bar = exactly 100,000 pascals.
• Label gauge, absolute, or differential readings explicitly.

Limitations and common mistakes

• The converter does not correct for altitude, temperature, instrument calibration, or gauge reference.
• Safety-critical equipment must follow its manufacturer and certified measurement procedures.

Common questions