🛞Pressure Converter

Pressure converter online — bar, psi, kPa, atm, mmHg

Our free pressure converter converts one value into all common units at once. Just enter a number and select the input unit — results appear instantly. We support bar, psi (pounds per square inch), kPa (kilopascals), atm (atmospheres) and mmHg (millimetres of mercury). All calculations run directly in your browser, without sending any data to a server.

Tyre pressure — quick check

Can't remember how much 2.2 bar is in psi? Use the presets below the input field — one click sets a typical tyre pressure value (2.0 / 2.2 / 2.5 bar) and you instantly see the conversion to all units. Also handy when inflating bicycle tyres (usually 3–6 bar) or motorcycles, where manufacturers quote pressure in different units.

Frequently asked questions

How much is 2.5 bar in psi?

2.5 bar equals approximately 36.26 psi. The converter uses the exact coefficient: 1 bar = 14.5037738 psi — you will see the result live as you type.

What is the correct tyre pressure?

For most passenger cars, manufacturers recommend 2.0–2.5 bar (29–36 psi). The exact value can be found on the sticker in the driver's door frame or in the vehicle owner's manual.

What is the difference between bar and atmosphere (atm)?

1 atmosphere (atm) is the pressure of the air column at sea level — it equals exactly 1.01325 bar. In practice the difference is small (about 1.3%), which is why the two values are often used interchangeably.

What is mmHg used for?

Millimetres of mercury (mmHg) is a unit used mainly in medicine — for measuring blood pressure and gas pressure. Normal atmospheric pressure is 760 mmHg, which corresponds to 1 atm or 1.01325 bar.