Pressure
Pressure Converter
Convert PSI, bar, pascals, atmospheres, and more
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Input
Auto-Calculated
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.
Measurement Knowledge
Pressure Reference Guides
Master pressure measurements with our comprehensive educational resources.
Popular Pressure Conversions
Direct access to the most commonly used conversion tools.
bar Bar Conversions
psi Pound per Square Inch Conversions
kPa Kilopascal Conversions
atm Atmosphere Conversions
mmHg Millimeter of Mercury Conversions
hPa Hectopascal Conversions
Supported Pressure Units
Complete listing of available pressure units in our converter.
bar
Bar
metric
psi
Pound per Square Inch
imperial
kPa
Kilopascal
metric
atm
Atmosphere
scientific
mmHg
Millimeter of Mercury
scientific
hPa
Hectopascal
metric
Pa
Pascal
metric