Pressure Unit Conversion Calculator

The main pressure measurement units are: 1) Pascal (Pa) - SI unit, force per area, 2) PSI (pounds per square inch) - common in US/UK, 3) Bar - metric unit, 1 bar = 100 kPa, 4) Atmosphere (atm) - reference to average air pressure, 5) Torr/mmHg - medical/vacuum measurements, 6) Kilopascal (kPa) - industrial applications, 7) Megapascal (MPa) - high-pressure systems.

Common pressure conversions include: 1) 1 bar = 14.5038 PSI = 100 kPa, 2) 1 atmosphere = 1.01325 bar = 14.696 PSI, 3) 1 PSI = 6.895 kPa = 51.715 mmHg, 4) 1 kPa = 0.145038 PSI = 7.50062 mmHg, 5) 1 MPa = 145.038 PSI = 10 bar. Always verify critical conversions with calibrated instruments.

Common pressure values include: 1) Car tire pressure: 30-35 PSI (2.1-2.4 bar), 2) Atmospheric pressure: 14.7 PSI (1013.25 hPa), 3) Bicycle tire: 40-120 PSI (2.8-8.3 bar), 4) Blood pressure: 120/80 mmHg, 5) Industrial hydraulics: 1000-5000 PSI (69-345 bar), 6) Natural gas lines: 60 PSI (4.14 bar).

Accurate pressure measurement requires: 1) Calibrated pressure gauges/sensors, 2) Proper installation and orientation, 3) Temperature compensation, 4) Regular calibration checks, 5) Appropriate range selection, 6) Consideration of static vs. dynamic pressure, 7) Environmental condition monitoring.

Pressure relationships include: 1) Pressure = Force ÷ Area (P = F/A), 2) Hydrostatic pressure = density × gravity × height (P = ρgh), 3) Ideal gas law: PV = nRT, 4) Gauge vs. absolute pressure difference = atmospheric pressure, 5) Pressure affects boiling point and phase changes.

Select pressure units based on: 1) Industry standards (HVAC uses PSI, weather uses hPa), 2) Equipment specifications, 3) Local regulations and codes, 4) Measurement range and precision needed, 5) End-user familiarity, 6) International vs. local use, 7) Safety requirements.

Pressure measurements are affected by: 1) Temperature changes, 2) Altitude and atmospheric conditions, 3) System dynamics and flow effects, 4) Sensor calibration and accuracy, 5) Installation position and orientation, 6) Vibration and pulsation, 7) Media properties (gas/liquid).

For critical pressure conversions: 1) Use certified conversion factors, 2) Double-check calculations independently, 3) Consider safety margins and tolerances, 4) Document all conversions and assumptions, 5) Use appropriate significant figures, 6) Verify with physical measurements when possible, 7) Consider system-specific requirements.