Pressure Converter

A pressure converter switches between units used in tires, hydraulics, HVAC, diving, and medicine without manual math. This free pressure conversion calculator handles PSI, bar, pascal (Pa), kilopascal (kPa), megapascal (MPa), atmosphere (atm), millimetres of mercury (mmHg), and torr — with instant results in your browser.

Whether you need a psi to bar calculator, a bar to psi calculator, or a general conversion of pressure units, select From and To units and enter any value. All pressure units and conversions use NIST-standard factors — nothing is uploaded to a server.

The most common task is psi pressure to bar — also searched as conversion from psi to bar, conversion pressure psi to bar, 1 psi to bar conversion, or convert 1 psi to bar. US automotive and industrial specs quote PSI; European datasheets use bar.

The exact psi to bar pressure converter formula:

bar = psi ÷ 14.503773773  ·  psi = bar × 14.503773773

Quick anchors: 1 psi to bar = 0.0689 bar · 2 psi to bar = 0.138 bar · 10 psi to bar ≈ 0.689 bar · 30 psi to bar ≈ 2.07 bar · 70 psi to bar ≈ 4.83 bar · 90 psi to bar ≈ 6.21 bar · 100 psi to bar ≈ 6.895 bar · 140 psi to bar ≈ 9.65 bar · 1000 psi to bar ≈ 68.95 bar.

Use this page as a psi calculator for any PSI value — tire pressure (32–35 psi), hydraulic lines, or test gauges.

Reverse direction: bar and psi conversion from bar to PSI — searched as bar conversion to psi, conversion pressure bar to psi, conversation bar to psi, bar into psi converter, or 1 bar convert to psi.

Multiply bar by 14.5038 to get PSI. Common lookups:

• 1 bar in psi / 1 bar equal to psi / 1.0 bar to psi = 14.504 psi
• 2 bars to psi / 2.2 bar to psi ≈ 29.0 / 31.9 psi
• 2.5 bar in psi ≈ 36.3 psi
• 4 bar to psi ≈ 58.0 psi
• 5 bars to psi ≈ 72.5 psi
• 10 bar to psi / 12 bar in psi / 12 bars to psi ≈ 145.0 / 174.0 psi
• 15 bar to psi ≈ 217.6 psi
• 20 bar to psi ≈ 290.1 psi
• 200 bar to psi ≈ 2,901 psi
• 300 bars to psi ≈ 4,351 psi

European tyre labels and compressor ratings often show bar — this bar to psi calculator converts them for US equipment instantly.

SI pressure uses the pascal (Pa). Kilopascals and megapascals appear on engineering drawings and material specs. Key relationships:

1 bar = 100 kPa = 100,000 Pa · 1 MPa = 10 bar · 1 kPa = 0.145038 psi

Kpa to bar: divide kPa by 100. Bar to kpa conversion: multiply bar by 100. Kpa and psi / kpa psi: multiply kPa by 0.145038 for PSI, or divide PSI by 6.89476 for kPa.

Anchor examples: 1kpa to psi / 1kpa psi ≈ 0.145 psi · 100 kpa to psi ≈ 14.5 psi · 200 kpa psi / 210 kpa to psi / 220 kpa to psi / 230 kpa to psi ≈ 29.0 / 30.5 / 31.9 / 33.4 psi · 300 kpa to psi ≈ 43.5 psi · 350 kpa to psi ≈ 50.8 psi.

Mpa to bar conversion: 1 MPa = 10 bar. Bar to mpa conversion: divide bar by 10. Mpa to psi conversion / mpa to psi calculator / conversion from mpa to psi: multiply MPa by 145.038. 1 mpa to psi = 145.0 psi. Conversion psi to mpa: divide PSI by 145.038.

Psi to pa: multiply PSI by 6,894.76 (exact factor 6894.757293168 Pa).

Bar to mbar: 1 bar = 1,000 millibar (mbar). Our bar mbar converter path: convert bar → Pa → target, or note that mbar equals hectopascal (hPa) in meteorology.

Bar to mmhg: 1 bar ≈ 750.06 mmHg. Blood pressure and vacuum gauges often use mmHg. 760 mmHg ≈ 1 standard atmosphere. Kpa to mmhg: multiply kPa by 7.50062.

Water-column units appear in HVAC and medical searches — cmh20 to mmhg and mmwc to bar. Although this tool does not list cmH₂O directly, approximate factors help: 1 cmH₂O ≈ 0.735 mmHg ≈ 0.00098 bar. Convert through kPa or bar as an intermediate step for close estimates.

Conversion of psi to kpa: multiply PSI by 6.89476. Useful when comparing US gauge readings to metric equipment datasheets.

Some Asian and European specs quote pressure in kgf/cm² (kilogram-force per square centimetre) — searched as kg per cm2 to psi, conversion kg cm2 to psi, convert kg cm to psi, conversion of psi to kg cm2, or 1 bar to kg cm2 conversion. This is a pressure unit, not mass: 1 kgf/cm² ≈ 98.07 kPa ≈ 0.9807 bar ≈ 14.22 psi. 1 kg pressure in psi in this context means kgf/cm² → about 14.22 psi per kgf/cm².

Searches like psi to kg, convert kg to psi, or kilogram to psi usually mean kgf/cm² pressure — not converting kilogram mass to PSI. Use the kg/cm² factors above, or convert through bar in this tool.

Bar to psig conversion, convert barg to psig, and barg to bara involve gauge vs absolute reference. PSIG and barg measure above atmospheric pressure; PSIA and bara include atmospheric offset (~14.7 psi or ~1 bar). This converter treats unit magnitudes — add or subtract 1 atm when switching between gauge and absolute readings.

This page acts as an interactive conversion chart for pressure and conversion table for pressure — change any input instead of reading a static poster. A printed conversion of pressure units table cannot update for your exact gauge reading; this pressure converter does.

Convert head to pressure (hydraulic head in metres of fluid) requires fluid density — a different formula (ρgh). Kpag to psi (gauge kPa) differs from absolute kPa by ~101.3 kPa at sea level — note the reference when reading datasheets.

For everyday tasks — tyres, scuba tanks, espresso machines (9 bar ≈ 130 psi), industrial compressors, and lab vacuum — PSI, bar, kPa, and mmHg conversions on this page cover the units in the dropdowns with standard NIST factors.