Convert inches of water to millibars

Explanation

From this page you can convert inches of water to millibars (or inH₂O to mbar) simply, by using the application above.

In case you are wondering, to convert from inches of water to millibars you need to multiply by 2.4909. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 inH₂O≈2.4909 mbar

inches of waterinH₂O

dimension	pressure
symbol	inH₂O, iwg
synonyms	inches water column, inches of water gauge

The inch of water (inH₂O, iwg) is a unit of pressure.

Note: this is the conventional inch of water, two other water pressure units exist, the inch of water at 39.2 °F and the inch of water at 60 °F.

Definition of the inch of water

An inch of water is the pressure exerted by a 1-inch-high column of water.

Value

One inch of water is approximately equal to 249.0889 Pa.

NIST Guide to the SI, Appendix B.9

Equivalences

One inch of water is equivalent to:

Water based pressure units

inch of water	inH₂O	1
foot of water	ftH₂O	12
inch of water at 39.2 °F	-
foot of water at 39.2 °F	-
inch of water at 60 °F	-

Related Conversions

millibarsmbar

dimension	pressure
symbol	mbar

The millibar (mbar) is a metric unit of pressure not part of the SI.

Definition of the millibar

One millibar is equal to 0.001 bars.

Equivalences

One millibar is equivalent to:

Some Facts

The atmospheric pressure at the surface of Mars varies between 4 and 8.7 millibars depending on the season. So at its maximum, the atmospheric pressure on Mars is less than one hundredth the one on Earth at sea level.

Bar units

millibar	mbar	0.001
centibar	cbar	0.01
decibar	dbar	0.1
bar	bar	1
decabar	dabar	10
hectobar	hbar	100
kilobar	kbar	1000
megabar	Mbar	1 000 000