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Pressure Converter

30 conversions available

Convert between Pascal, bar, PSI, atm, mmHg and more.

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Pascals → Kilopascals Pascals → Bar Pascals → PSI Pascals → Atmospheres Pascals → mmHg Kilopascals → Pascals Kilopascals → Bar Kilopascals → PSI Kilopascals → Atmospheres Kilopascals → mmHg Bar → Pascals Bar → Kilopascals Bar → PSI Bar → Atmospheres Bar → mmHg PSI → Pascals PSI → Kilopascals PSI → Bar PSI → Atmospheres PSI → mmHg Atmospheres → Pascals Atmospheres → Kilopascals Atmospheres → Bar Atmospheres → PSI Atmospheres → mmHg mmHg → Pascals mmHg → Kilopascals mmHg → Bar mmHg → PSI mmHg → Atmospheres

Most popular pressure conversions

The most searched pressure conversions are bar to psi, psi to bar, and kPa to psi, common in tire pressures and engineering. One bar is about 14.5 psi, and standard atmospheric pressure (1 atm) is 14.7 psi or 101,325 pascals.

Understanding pressure units

Pressure is force per unit area. The pascal is the SI unit, but bars and kilopascals are more practical. PSI leads in US engineering and tire pressures, while atmospheres provide an intuitive sea-level reference. Weather uses hectopascals (millibars).

Quick reference

1 bar = 14.5 psi = 100,000 Pa · 1 atm = 14.7 psi = 101,325 Pa · 1 psi = 6,895 Pa · 1 kPa = 0.145 psi. Use the converter for any exact value.

Quick reference: common pressure conversions

1 bar 14.5 psi (100 kPa)
1 atmosphere 1.013 bar (14.7 psi)
1 psi 6.895 kPa
1 mmHg (Torr) 133.3 Pa
Standard weather pressure 1,013 hPa
Typical car tire 32 psi ≈ 2.2 bar
Espresso extraction ~9 bar
10 m of sea water +1 bar

Frequently asked questions

How do I convert PSI to bar?

Divide by 14.5. A 32 psi tire is about 2.2 bar. Multiply bar by 14.5 to go back to psi.

What is normal atmospheric pressure?

About 1,013 hPa (1.013 bar, 14.7 psi) at sea level. Weather systems shift it a few percent — below ~1,000 hPa usually signals unsettled weather.

Why is blood pressure measured in mmHg?

Early instruments used a mercury column, and medicine kept the unit. 120/80 mmHg means the column rose 120 and 80 millimeters — about 16 and 10.7 kPa.