mmHg to Bar Converter

How to convert mmHg to Bar

To convert mmHg to Bar, multiply the value in mmHg by 0.00133322. For example, 5 mmHg = 0.0066661 bar.

Going from mmHg to Bar means applying a fixed conversion factor: one mmHg (mmHg) is exactly 0.00133322 Bar (bar). Type any number into the converter above and the equivalent updates instantly, or use the reference table for quick lookups.

Pressure conversions are used in weather forecasting, engineering, diving, automotive maintenance, and industrial processes. Different fields favor different units, making conversion a regular necessity.

Understanding mmHg and Bar

The pascal is the SI unit, but it's small, so kilopascals and bars are more practical for everyday use. PSI (pounds per square inch) dominates in US engineering and tire pressures, while atmospheres provide an intuitive reference point — 1 atm is roughly the air pressure at sea level. Weather reports use hectopascals or millibars, which are numerically identical.

How accurate is this conversion?

Pressure conversions are based on fixed physical definitions. One standard atmosphere equals exactly 101,325 pascals, and 1 bar equals exactly 100,000 pascals, so all conversions here are precise.

All conversion factors on ClearUnits are based on internationally recognised standards (the International System of Units, SI, and official definitions). Factors are reviewed for accuracy and the calculator uses full-precision values, rounding only the displayed result.

Quick reference: common mmHg to Bar values

The most frequently searched conversions are 1 mmHg = 0.00133322 Bar, 5 mmHg = 0.0066661 Bar, 10 mmHg = 0.0133322 Bar, and 100 mmHg = 0.133322 Bar. The full table further down covers every common value, and the calculator handles any number you need in between.