Pressure Converter

Convert pressure units online

Enter a value, pick your source and target units — the result updates live in your browser. No data leaves your device; everything runs locally.

The base unit is the pascal (Pa). Conversion factors follow exact SI and NIST definitions: 1 atm = 101 325 Pa, 1 bar = 100 000 Pa, 1 torr = 1 mmHg = 133.322 Pa, 1 psi = 6 894.757 Pa.

FAQ

What is the difference between torr and mmHg? For practical purposes they are equal — 1 torr is defined as 1/760 of a standard atmosphere, giving the same factor as mmHg.

Is psi metric? No — psi (pounds per square inch) is an imperial unit. 1 psi equals approximately 6 894.76 Pa or 0.0689 bar.