Pressure Converter

Convert between psi, kPa, bar, atm, mmHg, and more. Enter a value and pick the units.

Converted
—
In the target unit.

Usage Tip

Tire anchors: 32 psi ≈ 2.2 bar ≈ 221 kPa. Weather: about 1013 hPa = 1 atm.

THE MATH
Convert to a base unit, then to the target:
result = value × (from factor ÷ to factor)
Pressure is force per area; it converts through pascals. Everyday contexts: tire pressure (psi or bar), weather (hPa, inHg), vacuum (torr, mmHg).
One standard atmosphere is 101,325 Pa.
1 atm ≈ 101.3 kPa ≈ 14.7 psi ≈ 760 mmHg ≈ 1.013 bar.
mmHg and torr are essentially identical.
Tire pressures are gauge pressure (above atmospheric), not absolute.
Scroll to Top

The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.