Centimeters of Water (cmH₂O)	Millibars (mbar)
1 cmH₂O	0.9807 mbar
2 cmH₂O	1.9613 mbar
5 cmH₂O	4.9033 mbar
10 cmH₂O	9.8066 mbar
25 cmH₂O	24.5166 mbar
50 cmH₂O	49.0333 mbar
100 cmH₂O	98.0665 mbar
250 cmH₂O	245.1662 mbar
500 cmH₂O	490.3325 mbar
1000 cmH₂O	980.665 mbar

Convert Centimeters of Water to Millibars

Convert centimeters of water to millibars (cmH₂O to mbar) with our instant calculator. 1 cmH₂O = 0.980665 mbar. Includes exact formula and reference tables.

How to Convert Centimeters of Water to Millibars (cmH₂O to mbar)

1 Centimeter of Water (cmH₂O) is equal to 0.980665 Millibars (mbar). Multiply the centimeter of water value by 0.980665

Quick Answer 1 cmH₂O = 0.980665 mbar

Formula mbar = cmH₂O × 0.980665

Inverse Factor 1 mbar = 1.019716 cmH₂O

Unit Definitions & Metrology Context

The SI unit of pressure is the pascal (Pa). Standard sea-level atmosphere is defined as 101,325 Pa (1.01325 bar or ~14.696 psi).

About Centimeters of Water (cmH₂O): Centimeter of Water (cmH₂O) is a unit in the Pressure measurement category. It is widely used in cpap & medical respiratory pressure. Relative to the pressure base unit, 1 cmH₂O equals 98.0665 Pascals (Pa).

About Millibars (mbar): Millibar (mbar) is a unit in the Pressure measurement category. It is widely used in millibars (barometric pressure). Relative to the pressure base unit, 1 mbar equals 100 Pascals (Pa).

Need to convert in the opposite direction? Visit our Convert Millibars to Centimeters of Water (mbar to cmH₂O) calculator (1 mbar = 1.019716 cmH₂O).

Step-by-Step Worked Examples (cmH₂O to mbar)

Convert 5 Centimeters of Water to Millibars: Applying the formula (mbar = cmH₂O × 0.980665): starting with 5 cmH₂O, multiply the centimeter of water value by 0.980665 to get 4.9033 mbar.
Convert 10 Centimeters of Water to Millibars: Applying the formula (mbar = cmH₂O × 0.980665): starting with 10 cmH₂O, multiply the centimeter of water value by 0.980665 to get 9.8067 mbar.
Convert 50 Centimeters of Water to Millibars: Applying the formula (mbar = cmH₂O × 0.980665): starting with 50 cmH₂O, multiply the centimeter of water value by 0.980665 to get 49.0332 mbar.

Popular Pressure Conversions

Pound per Square Inch ⇄ Bar

Multiply PSI by ~0.0689476 to convert to bar.

Bar ⇄ Pound per Square Inch

Multiply bar by ~14.5038 to find pressure in pounds per square inch (PSI).

Kilopascal ⇄ Pound per Square Inch

1 PSI equals approximately 6.89476 kilopascals (kPa).

Standard Atmosphere ⇄ Pound per Square Inch

1 standard atmosphere equals approximately 14.6959 PSI.

Frequently Asked Questions

Verified answers and formulas for converting centimeters of water to millibars.

How many millibars are in 1 centimeter of water?

There are 0.980665 millibars (mbar) in 1 centimeter of water (cmH₂O). Conversely, 1 millibar equals 1.019716 centimeters of water.

How do you convert centimeters of water to millibars?

To convert centimeters of water (cmH₂O) to millibars (mbar), use the formula: mbar = cmH₂O × 0.980665. Multiply the centimeter of water value by 0.980665. For example, 10 cmH₂O equals 9.8067 mbar.

How do I convert back from millibars to centimeters of water?

To convert in the reverse direction from millibars (mbar) to centimeters of water (cmH₂O), use the inverse formula: cmH₂O = mbar × 1.019716213. Multiply the millibar value by 1.019716213 (1 mbar = 1.019716 cmH₂O).

What is the difference between centimeter of water (cmH₂O) and millibar (mbar)?

Both centimeter of water and millibar measure pressure. Centimeter of Water (cmH₂O) is a unit in the Pressure measurement category. It is widely used in cpap & medical respiratory pressure. Relative to the pressure base unit, 1 cmH₂O equals 98.0665 Pascals (Pa). Millibar (mbar) is a unit in the Pressure measurement category. It is widely used in millibars (barometric pressure). Relative to the pressure base unit, 1 mbar equals 100 Pascals (Pa).

How many PSI is in 1 bar?

1 bar equals approximately 14.5038 PSI. For car tires, 2.2 bar is roughly 32 PSI.