Hectopascal to cmH2O (4°C) Converter

Pressure Converter

29 units available

Decimals:

From

To

1.019716

1 hPa = 1.019716 cmH2O

Formula:

cmH2O = hPa × 1.019716213

With your value: 1 hPa = 1.01971621 cmH2O

Other Hectopascal to cmH2O (4°C) conversions

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

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

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

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.

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

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

How to Convert Hectopascal to cmH2O (4°C)

To convert from Hectopascal (hPa) to cmH2O (4°C) (cmH2O), multiply the value by 1.019716213.

Formula: cmH2O = hPa × 1.019716213

Reverse: hPa = cmH2O × 0.980665

Step-by-Step Example

Start with your value in Hectopascal. For example: 5 hPa
Multiply by the conversion factor: 5 x 1.019716213
The result is: 5.098581 cmH2O

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.

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.

Frequently Asked Questions

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

There are exactly 1.019716213 cmH2O (4°C) in 1 Hectopascal. This means the conversion factor from Hectopascal to cmH2O (4°C) is 1.019716213.

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

The formula to convert Hectopascal to cmH2O (4°C) is: cmH2O = hPa × 1.019716213. For example, to convert 10 Hectopascal to cmH2O (4°C), you would multiply 10 by 1.019716213.

What is a Hectopascal?