Pressure Converter

Pascal, bar, psi, atm, mmHg and torr converted. Convert pressure units instantly: pascal, kilopascal, bar, atmosphere, psi, mmHg and torr. Free pressure converter for tyres, labs and weather.

This tool runs 100% in your browser. Your input is never sent to any server — you can even go offline after the page loads.

About the Pressure Converter

Tyre gauges read psi, meteorologists quote hectopascals, blood pressure is mmHg and industrial systems use bar. This converter links all of them — pascal through megapascal, bar, atmosphere, psi, mmHg and torr — from a single input with exact factors (1 atm = 101325 Pa). Tyre pressure, weather maps, diving calculations and lab reports all become instantly cross-readable.

How to use the Pressure Converter

  1. Enter the pressure value.
  2. Choose its current unit.
  3. Read all other units in the table.
  4. Swap to convert in reverse.

Key features

What psi should my car tyres be?
Most passenger cars specify 30–35 psi (about 2.1–2.4 bar) cold — always follow the sticker on the driver's door jamb over generic advice.
What is the difference between mmHg and torr?
Almost none — 1 torr = 1/760 atm, and 1 mmHg differs by about one part in seven million. They are used interchangeably in practice.

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