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Pressure
Pressure Converter
Convert PSI, bar, pascals, atmospheres, and more
Conversion Formula
Target = Value × (From Ratio / To Ratio)
Pressure conversions use linear ratios. Target = Value × (Source Ratio / Target Ratio). To convert bar to PSI: multiply by 100,000 / 6,894.76.
Pressure conversion is vital in engineering, meteorology, diving, and automotive maintenance. Convert between pascals, kilopascals, bar, PSI, atmospheres, torr, and mmHg.
Standard atmospheric pressure at sea level is 1 atm = 101,325 Pa = 1.01325 bar = 14.696 PSI.
All Supported Pressure Units
| Unit | Symbol | Definition |
|---|---|---|
| Pascal | Pa | The SI unit of pressure, equal to 1 newton per square meter. |
| Kilopascal | kPa | One thousand pascals, used in tire pressure and weather reports. |
| Megapascal | MPa | One million pascals, used in material strength and hydraulics. |
| Hectopascal | hPa | One hundred pascals, the standard unit for atmospheric pressure. |
| Bar | bar | A metric unit of pressure equal to 100,000 pascals, common in engineering. |
| Millibar | mbar | One-thousandth of a bar, used in meteorology for atmospheric pressure. |
| Pound per sq inch | psi | Pounds of force per square inch, the US standard for tire pressure. |
| Atmosphere | atm | Standard atmospheric pressure at sea level, equal to 101,325 Pa. |
| Torr | Torr | A pressure unit equal to 1/760 of an atmosphere, used in vacuum measurement. |
| Millimeter of Mercury | mmHg | A pressure unit used in medicine for blood pressure measurement. |
| Inch of Mercury | inHg | A pressure unit used in aviation weather reports and refrigeration. |
Common Pressure Conversions
| From | To | Value |
|---|---|---|
| 1 bar | psi | 14.504 |
| 1 atm | bar | 1.013 |
| 1 atm | psi | 14.696 |
| 1 torr | atm | 0.001316 |
| 1 mmHg | torr | 1.000 |
Frequently Asked Questions
Bar is a metric unit (1 bar = 100,000 Pa). PSI is an imperial unit (pounds per square inch). 1 bar ≈ 14.504 PSI. Tire pressure is commonly measured in both units.
Torr is a pressure unit named after Evangelista Torricelli. 1 torr ≈ 1 mmHg. 760 torr = 1 standard atmosphere. It is used in vacuum measurement and physics.
To convert PSI to bar, divide by 14.504. For example, 36 PSI ÷ 14.504 = 2.48 bar. This is commonly needed for tire pressure conversion between US and metric systems.
Standard atmospheric pressure at sea level equals: 1 atm = 101,325 Pa = 1.01325 bar = 14.696 PSI = 760 mmHg = 760 torr = 29.92 inHg.
Millimeters of mercury (mmHg) is used in medicine for blood pressure measurement (e.g., 120/80 mmHg) and in barometric pressure readings. It originated from mercury barometers.
One kilopascal (kPa) equals 10 hectopascals (hPa). Both are used for atmospheric pressure: weather reports use hPa, while engineering uses kPa. 1 hPa = 1 mbar.
Typical car tire pressures range from 2.0 to 2.5 bar (29-36 PSI). Always check your vehicle's manual for the recommended pressure. Our converter helps you switch between bar and PSI easily.