cmH2O (4°C) to Hectopascal Converter

Pressure Converter

29 units available

Decimals:

From

To

0.980665

1 cmH2O = 0.980665 hPa

Formula:

hPa = cmH2O × 0.980665

With your value: 1 cmH2O = 0.980665 hPa

Other cmH2O (4°C) to Hectopascal conversions

2 cmH2O to hPa 3 cmH2O to hPa 4 cmH2O to hPa 5 cmH2O to hPa 6 cmH2O to hPa 7 cmH2O to hPa 8 cmH2O to hPa

cmH2O (4°C) to Hectopascal Conversion Table

cmH2O (4°C) (cmH2O)	Hectopascal (hPa)
0.5	0.490333
1	0.980665
2	1.96133
5	4.903325
10	9.80665
15	14.709975
20	19.6133
25	24.516625
50	49.03325
100	98.0665
250	245.16625
500	490.3325
1000	980.665

Hectopascal to cmH2O (4°C) Conversion Table

Hectopascal (hPa)	cmH2O (4°C) (cmH2O)
0.5	0.509858
1	1.019716
2	2.039432
5	5.098581
10	10.197162
15	15.295743
20	20.394324
25	25.492905
50	50.985811
100	101.971621
250	254.929053
500	509.858106
1000	1,019.716213

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

cmH2O (4°C) (cmH2O)

Pressure

Exact conversion

Derived from the pascal (1 Pa = 1 N/m²). The standard atmosphere is exactly 101 325 Pa.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Hectopascal (hPa)

Pressure

Exact conversion

Derived from the pascal (1 Pa = 1 N/m²). The standard atmosphere is exactly 101 325 Pa.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert cmH2O (4°C) to Hectopascal

To convert from cmH2O (4°C) (cmH2O) to Hectopascal (hPa), multiply the value by 0.980665.

Formula: hPa = cmH2O × 0.980665

Reverse: cmH2O = hPa × 1.019716213

Step-by-Step Example

Start with your value in cmH2O (4°C). For example: 5 cmH2O
Multiply by the conversion factor: 5 x 0.980665
The result is: 4.903325 hPa

About cmH2O (4°C)

The cmh2o (4°c) (cmH2O) is a unit of pressure and stress. One cmh2o (4°c) equals 98.0665 pascals. UnitConvertLab converts it against every other pressure unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: pressure calculations, engineering and science, education.

About Hectopascal

The hectopascal (hPa) is a unit of pressure and stress. One hectopascal equals 100 pascals. UnitConvertLab converts it against every other pressure unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: pressure calculations, engineering and science, education.

Frequently Asked Questions

How many Hectopascal are in 1 cmH2O (4°C)?

There are exactly 0.980665 Hectopascal in 1 cmH2O (4°C). This means the conversion factor from cmH2O (4°C) to Hectopascal is 0.980665.

What is the formula to convert cmH2O (4°C) to Hectopascal?

The formula to convert cmH2O (4°C) to Hectopascal is: hPa = cmH2O × 0.980665. For example, to convert 10 cmH2O (4°C) to Hectopascal, you would multiply 10 by 0.980665.

What is a cmH2O (4°C)?