Pressure converter

Pressure unit definitions

The pascal is one newton of force per square meter. One kilopascal is 1,000 pascals, one bar is exactly 100,000 pascals, and one standard atmosphere is exactly 101,325 pascals.

psi and mmHg

The pound per square inch is widely used for tires and equipment in the United States. This tool uses 1 psi = 6,894.757293168 pascals. A conventional millimeter of mercury is approximately 133.322387415 pascals.

Gauge and absolute pressure

Unit conversion does not change the reference point. Gauge pressure is measured relative to local atmospheric pressure, while absolute pressure is measured relative to a vacuum. Confirm which kind a specification or instrument reports.

Do not use a unit conversion alone to set safety-critical, medical, diving, industrial, or pressure-vessel limits. Follow the applicable equipment documentation and standards.