Pressure Converter

How to use this converter

Type a pressure in any unit and every other field updates instantly — ideal for checking transmitter ranges, gauge readings and datasheets.

Formula

1 bar = 100 kPa = 14.5038 psi 1 atm = 1.01325 bar 1 mH₂O = 98.0665 mbar

Example: a 0–10 bar pressure transmitter covers 0–145 psi or 0–1 MPa. A tyre at 32 psi is 2.21 bar.

Conversion table

bar	psi
0.1 bar	1.45038 psi
0.5 bar	7.25189 psi
1 bar	14.5038 psi
2 bar	29.0075 psi
5 bar	72.5189 psi
10 bar	145.038 psi
16 bar	232.06 psi
25 bar	362.594 psi
40 bar	580.151 psi
100 bar	1,450.38 psi
400 bar	5,801.51 psi

psi	bar
1 psi	0.0689476 bar
10 psi	0.689476 bar
15 psi	1.03421 bar
30 psi	2.06843 bar
32 psi	2.20632 bar
50 psi	3.44738 bar
100 psi	6.89476 bar
150 psi	10.3421 bar
300 psi	20.6843 bar
1,000 psi	68.9476 bar
3,000 psi	206.843 bar

Gauge vs absolute pressure

Most gauges read gauge pressure (barg, psig) — relative to the surrounding atmosphere. Absolute pressure (bara, psia) includes the atmosphere: bara ≈ barg + 1.013. Always check which a datasheet means.

Units by industry

Industry	Common units
Process instrumentation	bar, mbar, kPa, psi, inH₂O
Hydraulics	bar, MPa, psi
Medicine (blood pressure)	mmHg
Weather	hPa (= mbar)
HVAC and draft	Pa, inH₂O

The inH₂O value here uses water at 4 °C (the conventional reference); some industries use 60 °F or 68 °F, which differ by about 0.2%.

Frequently asked questions

How many psi is 1 bar?

14.5038 psi.

How many bar is 100 psi?

6.895 bar.

Is mbar the same as hPa?

Yes. 1 mbar = 1 hPa = 100 Pa.

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