Pressure Converter
Convert pressure units
Pressure Converter
Convert between pressure measurement units
Converted Pressure
About Pressure Converter
The Pressure Converter helps you convert between different pressure units including Pascal, kPa, MPa, bar, PSI, atmosphere, and torr. Perfect for engineering, weather, scuba diving, and scientific applications.
Whether you're checking tire pressure, analyzing weather data, or working on industrial systems, our converter provides accurate results instantly.
How to Use This Pressure Converter
Step 1: Enter the numeric value you want to convert.
Step 2: Select the from unit (Pa, kPa, MPa, bar, PSI, atm, torr).
Step 3: Select the to unit you want to convert to.
Step 4: Click "Convert" to see the converted value.
Step 5: Use the swap button (🔄) to quickly reverse the units.
Step 6: Click Reset to clear all inputs and start a new conversion.
Why Use a Pressure Converter?
✓ Engineering & Manufacturing
Convert hydraulic, pneumatic, and industrial pressure measurements across different unit systems.
✓ Weather & Aviation
Convert atmospheric pressure readings for weather forecasting, altitude calculations, and aviation.
✓ Scuba Diving
Convert pressure readings for dive computers, tank pressure, and depth calculations. Essential for safe diving.
✓ Science & Physics
Convert pressure units for laboratory experiments, physics problems, and scientific research.
Pressure Units Explained
Pascal (Pa)
SI unit of pressure. 1 Pa = 1 N/m². Used in science and engineering. kPa and MPa are common multiples.
PSI (lb/in²)
Imperial unit: pounds per square inch. Used for tire pressure, hydraulic systems, and industrial applications in US.
Bar
1 bar = 100,000 Pa. Used in weather, scuba diving, and European industry. 1 bar ≈ 14.5 PSI.
Atmosphere (atm)
Standard atmospheric pressure at sea level. 1 atm = 101.325 kPa = 14.6959 PSI. Used as reference.
Real-World Pressure Examples
| Application | Pressure | Equivalent |
|---|---|---|
| Tire Pressure (Car) | 32 PSI | 2.2 bar, 220 kPa |
| Atmospheric (Sea Level) | 14.7 PSI | 1 atm, 101.3 kPa |
| Scuba Tank (Full) | 3000 PSI | 207 bar, 20.7 MPa |
| Blood Pressure (Normal) | 120 mmHg | 16 kPa, 2.32 PSI |
| Steam Boiler | 150 PSI | 10.3 bar, 1.03 MPa |
Pressure Conversion Formulas
| From | To | Formula |
|---|---|---|
| PSI | bar | × 0.0689476 |
| bar | PSI | × 14.5038 |
| atm | PSI | × 14.6959 |
| kPa | PSI | × 0.145038 |
| mmHg (torr) | PSI | × 0.0193368 |
| MPa | PSI | × 145.038 |
Common Pressure Conversions
| From | To | Multiply By |
|---|---|---|
| PSI | bar | 0.0689476 |
| bar | PSI | 14.5038 |
| atm | PSI | 14.6959 |
| kPa | PSI | 0.145038 |
Frequently Asked Questions
1 PSI = 0.0689476 bar. Multiply PSI by 0.0689476. Example: 100 PSI × 0.0689476 = 6.89476 bar.
Standard atmospheric pressure at sea level is 14.7 PSI, 101.325 kPa, or 1.01325 bar. Used as reference for pressure measurements.
Bar is metric unit (1 bar = 100,000 Pa). PSI is imperial unit (pounds per square inch). 1 bar ≈ 14.5 PSI. Both measure pressure, used in different countries.
Pascal (Pa) is the SI unit of pressure. 1 Pascal = 1 Newton per square meter. Kilopascal (kPa) and Megapascal (MPa) are common for higher pressures.
1 PSI = 6.89476 kPa. Multiply PSI by 6.89476. Example: 100 PSI × 6.89476 = 689.476 kPa.
Gauge pressure (psig) measures pressure relative to atmospheric pressure. Absolute pressure (psia) includes atmospheric pressure (14.7 psi). Formula: Absolute = Gauge + Atmospheric. Example: 32 psig = 32 + 14.7 = 46.7 psia. Most tire pressure gauges measure gauge pressure.
Blood pressure is measured in mmHg (millimeters of mercury). Normal: 120/80 mmHg. 1 mmHg = 0.01934 PSI = 133.322 Pa. Our converter handles mmHg (torr) to all units.
Use the number on the sticker inside your driver's door frame or in the owner's manual — not the maximum pressure printed on the tire's sidewall, which is a ceiling, not a recommendation. Most passenger cars run 30-35 PSI (about 2.1-2.4 bar), but always check your specific vehicle's placard.
Divers commonly use bar or ATA (atmospheres absolute) instead of PSI. Every 10 meters (33 feet) of seawater adds roughly 1 bar of pressure, so a diver at 20m experiences about 3 ATA total — 1 ATA from the atmosphere plus 2 ATA from the water above. Dive computers typically display bar directly.
Built and maintained by Sanjay Singh · Founder, Numrexo
Builds and maintains the calculators on Numrexo. Each tool's formula is documented on its page, and any reference source it relies on is listed under Method and references.
Last updated: · Calculations run in your browser. Nothing you enter is sent to us or stored.
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