Inch of Mercury (60 °F) Unit | All you need to know

The inch of mercury (60 °F) is a non-SI unit of pressure based on the density of mercury at 60 °F (15.56 °C). This definition is commonly used in aviation, meteorology, and engineering standards in North America. While the pascal is the SI unit of pressure, the inch of mercury (60 °F) remains important for barometric and calibration measurements. Additional details are available in the inch of mercury article.

One inch of mercury (60 °F) is equal to 3,376.85 pascals, 3.37685 kilopascals, 0.0337685 bar, 0.489771 psi, and 25.328 millimeters of mercury. This unit is commonly referenced in engineering specifications and atmospheric pressure measurements.

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