Pressure Converter – Pascal, Bar & PSI Table

This pressure unit converter routes every input through exact definitions — 1 bar = 100,000 Pa and 1 psi = 0.0689475729 bar exactly. Enter a value, pick the source and target units, and the result appears instantly with the factor applied shown beside it. Pascals are the SI language of physics, bars run European tire gauges and industrial hydraulics, psi fills American pumps and plumbing, and atmospheres anchor chemistry — four dialects for the same stress. The bridges are exact: 1 bar = 100,000 Pa by definition, 1 atm = 101,325 Pa exactly, and 1 psi = 6894.757293 Pa, so nothing here is measured — it is defined. A mini table of the head factor makes spot-checks immediate: 1 bar = 14.5038 psi; 5 bar = 72.5189 psi; 10 bar = 145.0377 psi; 50 bar = 725.1887 psi; 100 bar = 1,450 psi. Tire sanity check: 32 psi reads 2.21 bar and about 220,600 Pa; a garage gauge that disagrees by more than a few percent is the problem, not the conversion.

1. 1

   Step 1

   Enter the value you want to convert

2. 2

   Step 2

   Select the source unit you are converting from

3. 3

   Step 3

   Select the target unit you want as the result

4. 4

   Step 4

   Read the exact result, then swap or copy as needed

• 1

  Industrial datasheets increasingly quote both kPa and psi — convert once, annotate

• 2

  Weather hPa = mbar, no conversion needed

• 3

  1 atm ≈ 1.01325 bar ≈ 14.7 psi links all three everyday units

• 4

  Door-jamb stickers quote cold pressures — convert them before driving to the station

• Confusing gauge pressure (psi g) with absolute pressure (psia): a 14.7 psi gap

• Treating 1 bar as 1000 Pa instead of 100,000 Pa

• Mixing millibars into pascal math without the ×100 step