- Enter Pressure — Type any numeric value.
- Select Units — Choose from 11 pressure units (Pascal, hPa, kPa, MPa, bar, mbar, atm, PSI, mmHg, inHg, cmH₂O). Use swap to reverse.
- See Results — Real-time conversion with all other equivalents.
- Copy — Click 'Copy' to copy result.
Pressure Converter — Convert Between Pressure Units
The Pressure Converter is a free, instant-use tool that converts between 11 pressure and force units. Whether you're checking tire pressure, reading weather reports, working with hydraulic systems, monitoring blood pressure, or performing engineering calculations, this tool provides accurate real-time conversions between all major pressure units.
All calculations use exact conversion factors and run entirely in your browser. No data is sent to any server.
Supported Pressure Units
- Pascal (Pa) — The SI unit of pressure. One Pascal equals one newton per square meter (N/m²). Used in scientific and engineering calculations worldwide.
- Hectopascal (hPa) — 100 Pascals. The standard unit for atmospheric pressure in meteorology. Weather reports typically use hPa (e.g., "1013 hPa").
- Kilopascal (kPa) — 1,000 Pascals. Common in engineering, tire pressure specifications in metric countries (e.g., "220 kPa"), and material strength ratings.
- Megapascal (MPa) — 1,000,000 Pascals. Used for high-pressure applications like hydraulic systems, concrete strength testing, and material science.
- Bar — Approximately equal to atmospheric pressure (1 bar ≈ 0.987 atm). Used in industry, scuba diving (tank pressure), and European tire specifications.
- Millibar (mbar) — One thousandth of a bar, identical to hectopascal in value. Used in meteorology and vacuum technology.
- Atmosphere (atm) — Standard atmospheric pressure at sea level. 1 atm = 101,325 Pa. Used as a reference point in chemistry and physics.
- PSI (lb/in²) — Pounds per square inch. The primary pressure unit in the US and UK for tire pressure, compressed gas, hydraulics, and HVAC systems.
- mmHg (Torr) — Millimeters of mercury. Used in medicine for blood pressure readings (e.g., "120/80 mmHg") and in laboratory vacuum measurements.
- inHg — Inches of mercury. Used in US aviation for altimeter settings and in weather reports for barometric pressure.
- cmH₂O — Centimeters of water column. Used in medicine for ventilator pressures and in HVAC for duct pressure measurements.
Key Conversion Factors
- 1 atm = 101,325 Pa = 1.01325 bar = 14.696 PSI = 760 mmHg
- 1 bar = 100,000 Pa = 14.504 PSI = 750.06 mmHg
- 1 PSI = 6,894.76 Pa = 0.0689 bar = 51.715 mmHg
- 1 mmHg = 133.322 Pa = 0.01934 PSI = 1 Torr
Features
- 11 Units — Comprehensive coverage of scientific, industrial, medical, and weather units.
- Real-Time — Instant conversion as you type.
- All-Unit View — See all 10 other equivalents simultaneously.
- Swap & Copy — Quick direction swap and clipboard copy.
Common Use Cases
- Automotive — Convert tire pressure between PSI, bar, and kPa.
- Weather — Convert barometric pressure between hPa, mbar, mmHg, and inHg.
- Medicine — Convert blood pressure readings and ventilator settings.
- Engineering — Convert between scientific and industrial pressure units.
- Scuba Diving — Convert tank and depth pressure between bar, PSI, and atm.
Privacy
All conversions run in your browser. No data is transmitted. Works offline.