Pressure Converter
Convert between bar, psi, pascal, atmosphere, and mmHg.
What is Pressure?
A pressure converter spanning SI (pascal family), imperial (psi), and legacy units (bar, atm, torr, mmHg, inHg).
How it works
All units are defined relative to the pascal with exact factors, including the standard-atmosphere definitions.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Tire and weather pressure
Convert 32 psi to 220.6 kPa or 2.21 bar — the units used across car specs, compressors, and meteorology.
Common mistakes
Absolute vs gauge pressure
Gauge pressure (psi) excludes atmospheric pressure; absolute (psia) includes it. The converter labels which one you're using.
Frequently asked questions
Which units are included?
psi, bar, kPa, MPa, atm, mmHg, and torr — covering automotive, industrial, and scientific use.
Is psi the same as psig?
No — psi is often used loosely for gauge pressure; psig explicitly means gauge and psia means absolute.
Can I convert a weather reading?
Yes — hPa and mmHg are both supported, which covers typical barometer readings.