Convert between psi, bar, atmospheres, pascals, kilopascals, mmHg, and inHg. Essential for engineering, weather, and tire pressure conversions.
PSI
14.7 psi
Bar
1.0135 bar
Atmospheres
1.0003 atm
Pascals
101,352.97 Pa
Kilopascals
101.353 kPa
Megapascals
0.1014 MPa
mmHg
760.2119 mmHg
inHg
29.9295 inHg
Torr
760.2119 Torr
| Unit | Value | Common Use |
|---|---|---|
| Pascals | 101,352.97 Pa | SI base unit, scientific calculations |
| Kilopascals | 101.353 kPa | Engineering, weather systems |
| Megapascals | 0.1014 MPa | Material science, hydraulics |
| Bar | 1.0135 bar | Meteorology, European industry |
| Atmospheres | 1.0003 atm | Diving, chemistry, altitude |
| PSI | 14.7 psi | Tires, HVAC, US industry |
| mmHg | 760.2119 mmHg | Blood pressure, medical |
| inHg | 29.9295 inHg | Weather (US), vacuum systems |
| Torr | 760.2119 Torr | Vacuum technology, physics |
Safe: 30-35 PSI
Pressure is too low. Risk of underperformance.
Safe: 80-130 PSI
Pressure is too low. Risk of underperformance.
Safe: 60-80 PSI
Pressure is too low. Risk of underperformance.
Safe: 2500-3500 PSI
Pressure is too low. Risk of underperformance.
Safe: 90-150 PSI
Pressure is too low. Risk of underperformance.
Safe: 8-10 bar (116-145 PSI)
Pressure is too high. Risk of damage or failure.
Human Blood Pressure
120/80 mmHg systolic
~2.3 PSI
6.34x
Basketball
Game-ready ball
7-9 PSI
1.84x
Soccer Ball
Official FIFA spec
8.5-15.6 PSI
1.22x
Car Tire
Passenger vehicle
30-35 PSI
45.9%
Bicycle Tire (Road)
High-performance road bike
80-130 PSI
14.7%
Espresso Machine
9 bar brewing pressure
116-145 PSI
11.3%
Fire Extinguisher
Charged unit (12 bar)
100-195 PSI
9.8%
Industrial Air Compressor
Workshop tools
90-150 PSI
12.3%
Scuba Tank
Full aluminum tank (207 bar)
2500-3500 PSI
0.5%
Hydraulic System
Heavy machinery
1500-5000 PSI
0.5%
Vacuum (Space)
Near-perfect vacuum
~0 PSI
147000x
Atmospheric Pressure
Sea level (1 atm)
14.7 PSI
1.00x
Pressure is measured in many different units depending on the field. PSI (pounds per square inch) is common in the US for tire pressure and industrial applications. Bar is used in Europe. Pascals and kilopascals are the SI units. Atmospheres, mmHg, and inHg are used in meteorology and medicine. This converter handles all major pressure units.
Standard atmospheric pressure at sea level is defined as 1 atmosphere (atm), which equals 101,325 Pa, 101.325 kPa, 14.696 psi, 1.01325 bar, 760 mmHg, or 29.921 inHg.
Divide the psi value by 14.5038. For example, 30 psi = 30 / 14.5038 = 2.068 bar. Tire pressure is commonly given in psi in the US and bar in Europe.
Gauge pressure measures pressure relative to atmospheric pressure (what a tire gauge reads), while absolute pressure includes atmospheric pressure. Absolute pressure = gauge pressure + atmospheric pressure. This converter works with absolute values.
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