Pressure Converter

Enter a pressure, choose its unit and the unit you want.

Updated October 27, 2026

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Formula

result = value × (pascals in the from unit) ÷ (pascals in the to unit)

Every unit is stored as a fixed multiple of the base unit (Pa), so any pair converts in one step.

Worked example

30 psi to bar: 30 × 6894.757293168 Pa = 206842.7188 Pa, and 1 bar = 100000 Pa, so 206842.7188 ÷ 100000 = 2.068427 bar.

Quick reference

1 atm = 101325 Pa, 1 bar = 100000 Pa, 1 psi = 6894.757 Pa, 1 atm = 14.696 psi.

Frequently asked questions

How many psi is 1 bar?

1 bar is 14.5038 psi, since 100,000 Pa ÷ 6,894.757 Pa per psi. A 2.5 bar tyre is therefore about 36.3 psi.

How many kPa is 1 atmosphere?

1 standard atmosphere is exactly 101,325 Pa, which is 101.325 kPa or 1.01325 bar.

What is the difference between torr and mmHg?

Torr is defined as 1/760 of an atmosphere (133.3224 Pa). The conventional mmHg is 133.322387 Pa, so they differ by less than one part in a million.

How do I convert psi to kPa?

Multiply psi by 6.894757. For example 30 psi is 30 × 6.894757 = 206.84 kPa.

How we calculate

Pressure Converter

Formula

Worked example

Quick reference

Frequently asked questions

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