Pressure Converter

Convert pressure between pascals, hectopascals, kilopascals, bar, psi, atmospheres, and millimeters of mercury. Calculates in your browser.

-

About pressure conversions

Enter a value and choose the units to convert between. Each pressure unit is defined against a single base unit, so any pair lines up consistently, the table shows your value in every pressure unit at once.

What this does

A pressure converter changes a pressure reading between pascals, hectopascals, kilopascals, bar, psi, atmospheres, and millimeters of mercury.

How to use it

  1. Enter a value and pick its unit.
  2. Choose the unit to convert to.
  3. Read the converted result instantly.
  4. Swap the units to reverse the conversion.

How it works

Each value is converted to pascals first and then to the target unit. The pascal is the SI base (one newton per square meter); larger units like bar, psi, and atmosphere are fixed multiples of it.

psi = bar × 14.5038

Example

One bar is about 14.5 psi, and one standard atmosphere is 101,325 pascals, roughly 14.7 psi or 1.013 bar.

Sources & methodology

Last updated .

Frequently asked questions

How many psi are in a bar?

One bar is about 14.504 psi, and one psi is about 6,894.76 pascals.

What is one atmosphere?

Standard atmosphere is 101,325 pascals, roughly 14.7 psi or 1.013 bar, about average sea-level air pressure.

Is my data stored?

No. Everything is calculated locally in your browser.