How many inch of mercury in 1 millidecipascal? The answer is 2.9529983071445E-8. We assume you are converting between inch of mercury [0 °C] and millidecipascal. You can view more details on each measurement unit: inch of mercury or millidecipascal The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00029529983071445 inch of mercury, or 10000 millidecipascal. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between inches of mercury and millidecipascals. Type in your own numbers in the form to convert the units!
1 inch of mercury to millidecipascal = 33863886.66667 millidecipascal
2 inch of mercury to millidecipascal = 67727773.33333 millidecipascal
3 inch of mercury to millidecipascal = 101591660 millidecipascal
4 inch of mercury to millidecipascal = 135455546.66667 millidecipascal
5 inch of mercury to millidecipascal = 169319433.33333 millidecipascal
6 inch of mercury to millidecipascal = 203183320 millidecipascal
7 inch of mercury to millidecipascal = 237047206.66667 millidecipascal
8 inch of mercury to millidecipascal = 270911093.33333 millidecipascal
9 inch of mercury to millidecipascal = 304774980 millidecipascal
10 inch of mercury to millidecipascal = 338638866.66667 millidecipascal
You can do the reverse unit conversion from millidecipascal to inch of mercury, or enter any two units below:
Inches of mercury or inHg is a non-SI unit for pressure. It is still widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.
It is defined as the pressure exerted by a column of mercury of 1 inch in height at 32 °F (0 °C) at the standard acceleration of gravity.
1 inHg = 3,386.389 pascals at 0 °C.
Aircraft operating at higher altitudes (above 18,000 feet) set their barometric altimeters to a standard pressure of 29.92 inHg or 1,013.2 hPa (1 hPa = 1 mbar) regardless of the actual sea level pressure, with inches of mercury used in the U.S. and Canada. The resulting altimeter readings are known as flight levels.
Piston engine aircraft with constant-speed propellers also use inHg to measure manifold pressure, which is indicative of engine power produced.
The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.
So 1 millidecipascal = 10-3 decipascals.
ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 70 kg, 150 lbs, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!