Pressure Converter
Pressure is force per unit area (P = F/A). The SI unit is the pascal (Pa = N/m²). Common units include atmospheres (atm), bar, PSI (pounds per square inch), mmHg (torr), and kPa. Pressure is used in weather, diving, tire pressure, and fluid dynamics.
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Tip: Car tire pressure: check when cold (parked 3+ hours). Pressure rises ~4 PSI when warm from driving. The recommended PSI is on a sticker inside the driver's door, not on the tire sidewall (that's the maximum, not the recommended).
- 11 atmosphere (atm) = 101,325 Pa = 14.696 PSI = 760 mmHg = 1.01325 bar
- 21 bar = 100,000 Pa (close to 1 atm)
- 31 PSI = 6,894.76 Pa
- 41 mmHg = 133.322 Pa (blood pressure unit)
| Pressure | Pa | Context |
|---|---|---|
| Standard atmosphere | 101,325 Pa | Sea level average |
| 1 bar | 100,000 Pa | Weather maps |
| Car tire pressure | 200,000–250,000 Pa | 29–36 PSI |
| Blood pressure (systolic) | 16,000 Pa | 120 mmHg |
| Deep sea (10,000m) | 101,325,000 Pa | 1,000 atm |
| Bicycle tire | 483,000–827,000 Pa | 70–120 PSI |
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Fun Fact
At the bottom of the Mariana Trench (~11,000m deep), the pressure is about 1,100 atm = 16,000 PSI. This is equivalent to 50 jumbo jets stacked on top of you. Specialized submarines with thick steel hulls are needed to survive this.
References
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