Convert pressure, instantly.
Pascals, kilopascals, bar, PSI, atmospheres and mmHg — for tires, weather and gas systems.
Pressure Converter
Pressure conversion benchmarks
🎚️ Pressure
| 1 atm | 101,325 Pa |
| 1 bar | 100,000 Pa |
| 1 psi | 6,894.76 Pa |
| 1 atm | 14.696 psi |
How this conversion works
Pressure conversions here run through the pascal (Pa) as the base SI unit. PSI (pounds per square inch) is the common unit on US tire gauges and plumbing fittings, bar is common on European gauges and weather reports, and mmHg still shows up in medical blood-pressure readings and some barometers.
One standard atmosphere (atm) represents typical sea-level air pressure and is a useful reference point: it's about 14.7 psi, almost exactly 1.013 bar, and 760 mmHg.
Frequently asked questions
What tire pressure is 'normal' in PSI vs bar?
Most passenger car tires run around 30–35 psi, which is roughly 2.1–2.4 bar. Always use the value on your vehicle's door jamb sticker rather than a general rule, since it varies by vehicle and load.
Is bar the same as atmospheres?
Close, but not identical. 1 bar is 100,000 Pa exactly, while 1 standard atmosphere is 101,325 Pa — a difference of about 1.3%, small enough that the two are sometimes used loosely interchangeably, but not precisely equal.