Pressure unit converter
Convert pressure units — Pa, hPa, kPa, MPa, bar, mbar, atm, mmHg, inHg, mmH₂O, psi and kgf/cm² — in one pass.
Runs in your browserEvery computation happens in your browser — your data never leaves this device.
Result
The source to target line first, then every common unit.
Enter a pressure to convert
Units: 0
What this tool does
- Inflate tyres and cylinders: 1 bar = 14.503774 psi = 100 kPa at a glance.
- Read nameplates: 1 MPa = 10 bar and 1 kgf/cm² = 0.0980665 MPa.
- Convert lab and weather data: 1 atm = 101325 Pa and 1 mmHg = 133.322387415 Pa.
Example
Input
1
Output
巴 (bar) → 磅力每平方英寸 (psi)：1 bar = 14.503774 psi 帕斯卡 (Pa) = 100000 Pa 百帕 (hPa) = 1000 hPa 千帕 (kPa) = 100 kPa 兆帕 (MPa) = 0.1 MPa 巴 (bar) = 1 bar 毫巴 (mbar) = 1000 mbar 标准大气压 (atm) = 0.986923 atm 毫米汞柱 (mmHg) = 750.061576 mmHg 英寸汞柱 (inHg) = 29.52998 inHg 毫米水柱 (mmH2O) = 10197.16213 mmH2O 磅力每平方英寸 (psi) = 14.503774 psi 千克力每平方厘米 (kgf/cm²) = 1.019716 kgf/cm²
1 bar = 100000 Pa = 14.503773773 psi = 1.019716213 kgf/cm²; 1 atm = 101325 Pa by definition.
Frequently asked questions
How do I quickly estimate psi, bar and kPa?
Three facts: 1 bar = 100 kPa, 1 psi ≈ 6.895 kPa and 1 bar ≈ 14.5 psi. A 2.5 bar tyre pressure is 250 kPa or 36.26 psi.
How far is kgf/cm² from bar?
1 kgf/cm² = 98066.5 Pa versus 1 bar = 100000 Pa, so bar is about 2% larger.
Is the standard atmosphere exact?
Yes: 1 atm = 101325 Pa is defined (1954 CGPM). It is not the actual sea-level pressure, which hovers near 1013.25 hPa.
Is mmHg the same as torr?
Almost. 1 mmHg = 133.322387415 Pa uses mercury at 0 °C under standard gravity; 1 torr = 101325/760 ≈ 133.322368421 Pa — about 1.4e-7 apart, interchangeable day to day.
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