Pressure Converter
Convert pressure between pascals, kilopascals, bar, atmospheres, PSI, and mmHg.
- Free to use
- No registration required
- Works on all devices
- Last updated
- 12-09-2026
Enter a pressure value and choose a from/to unit to convert between pascals, bar, atmospheres, PSI, and mmHg.
Your result
14.696
Converted value
AI explanation
Formula
Converted value = amount × (from-unit-to-pascal factor) ÷ (to-unit-to-pascal factor)Worked example
1 atmosphere to PSI
| Field | Value |
|---|---|
| Amount | 1 |
| From unit | atm |
| To unit | psi |
| Converted value | 14.695949 |
Assumptions
- 1 standard atmosphere is defined as exactly 101,325 Pa.
- mmHg and torr are treated as equivalent (their true values differ by less than 0.001%).
Frequently asked questions
How many PSI are in 1 atmosphere?
1 atmosphere ≈ 14.696 PSI — commonly used as a reference point for tire pressure and altitude/weather discussions.
What's the difference between bar and atm?
1 bar = 100,000 Pa exactly, while 1 atm = 101,325 Pa exactly — they're close but not identical (1 atm ≈ 1.01325 bar).
Where is mmHg pressure commonly used?
Blood pressure readings and barometric weather readings are traditionally given in mmHg (millimeters of mercury), also called torr.