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Convert psi, bar, atmospheres, pascals and mmHg.
Convert psi, bar, atmospheres, pascals and mmHg.
Enter values above and click Calculate — results will appear here with the formula explained.
Pressure wears many coats depending on industry. Tire gauges read psi or bar; meteorologists chart hectopascals/millibars; medicine measures blood in mmHg, echoing mercury manometers; science defaults to pascals or atmospheres. All reduce to force per area, anchored here on the SI pascal.
Standard atmosphere — average sea-level air pressure — equals exactly 101,325 Pa by definition, giving every unit a common reference. One bar was engineered to approximate it (within 1.3%), which is why tire sidewalls quoting both look so similar.
Convert psi, bar, atmospheres, pascals and mmHg. Formula: result = value × (from-factor ÷ to-factor), anchored on the pascal. Example: A 32 psi tire recommendation equals 2.21 bar or 220.6 kPa — pump confidently anywhere in Europe.
Pressure wears many coats depending on industry. Tire gauges read psi or bar; meteorologists chart hectopascals/millibars; medicine measures blood in mmHg, echoing mercury manometers; science defaults to pascals or atmospheres. All reduce to force per area, anchored here on the SI pascal.
Standard atmosphere — average sea-level air pressure — equals exactly 101,325 Pa by definition, giving every unit a common reference. One bar was engineered to approximate it (within 1.3%), which is why tire sidewalls quoting both look so similar.
A 32 psi tire recommendation equals 2.21 bar or 220.6 kPa — pump confidently anywhere in Europe.
Formulas are standard public references (see our methodology). External standards are cited in the text where they apply.
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