Pressure converter
Free pressure converter between pascal, bar, psi, atmospheres, kPa, MPa, torr, mmHg, inHg, and meters of water. Covers weather, tires, engineering, vacuum, and blood-pressure units.
Force per area. Meteorology, engineering, vacuum.
1 bar = 14.5038 psi
How to use pressure converter
- 01Pick a category
Length, weight, temperature, or pressure. Each has its own dedicated page with the complete unit list.
- 02Type your value
Enter the number you want to convert. The result updates instantly as you type — no submit button.
- 03Swap units
Use the From and To pickers to choose any pair — metric, imperial, SI, or exotic. Swap with one click.
- 04Copy the result
Tap the copy button next to the output to paste the result anywhere.
- 05Reuse from history
Recent conversions are saved to your browser locally so you can re-run them without retyping.
Examples
Frequently asked questions
How many psi is one bar?
1 bar = 14.5038 psi. The conversion is exact: 1 bar = 100,000 pascal, and 1 psi = 6,894.757 pascal.
What's the difference between bar and atmosphere?
A bar is defined as exactly 100,000 Pa. A standard atmosphere is 101,325 Pa — about 1.3% higher. Bars are common in weather and diving; atmospheres are common in chemistry and physics.
Is mmHg still used?
Yes — blood pressure is still universally reported in mmHg (e.g., 120/80), and vacuum systems are often specified in mmHg or torr (which is almost identical).
Why do US weather reports use inches of mercury?
Historical US convention. Altimeters in US aviation and US weather broadcasts still use inches of mercury; most other countries use hectopascals (hPa) or millibars.
Last updated . Built by Tooligan.