Atmosphere (std) to cmH2O (4°C) Converter

Pressure Converter

29 units available

Decimals:

From

To

1,033.227453

1 atm = 1,033.227453 cmH2O

Formula:

cmH2O = atm × 1,033.2274527999

With your value: 1 atm = 1,033.2274528 cmH2O

Other Atmosphere (std) to cmH2O (4°C) conversions

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

Atmosphere (std) to cmH2O (4°C) Conversion Table

Atmosphere (std) (atm)	cmH2O (4°C) (cmH2O)
0.5	516.613726
1	1,033.227453
2	2,066.454906
5	5,166.137264
10	10,332.274528
15	15,498.411792
20	20,664.549056
25	25,830.68632
50	51,661.37264
100	103,322.74528
250	258,306.8632
500	516,613.7264
1000	1,033,227.4528

cmH2O (4°C) to Atmosphere (std) Conversion Table

cmH2O (4°C) (cmH2O)	Atmosphere (std) (atm)
0.5	0.000484
1	0.000968
2	0.001936
5	0.004839
10	0.009678
15	0.014518
20	0.019357
25	0.024196
50	0.048392
100	0.096784
250	0.24196
500	0.483921
1000	0.967841

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.

Atmosphere (std) (atm)

Pressure

Exact conversion

The standard atmosphere is exactly 101 325 Pa.

Source: Units accepted for use with the SI, SI Brochure Table 8

Bureau International des Poids et Mesures · 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 Atmosphere (std) to cmH2O (4°C)

To convert from Atmosphere (std) (atm) to cmH2O (4°C) (cmH2O), multiply the value by 1,033.2274527999.

Formula: cmH2O = atm × 1,033.2274527999

Reverse: atm = cmH2O × 0.0009678411

Step-by-Step Example

Start with your value in Atmosphere (std). For example: 5 atm
Multiply by the conversion factor: 5 x 1,033.2274527999
The result is: 5,166.137264 cmH2O

About Atmosphere (std)

One standard atmosphere equals 101,325 Pascals and represents the average air pressure at sea level.

Common uses: diving, weather, chemistry.

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 Atmosphere (std)?

There are exactly 1,033.2274527999 cmH2O (4°C) in 1 Atmosphere (std). This means the conversion factor from Atmosphere (std) to cmH2O (4°C) is 1,033.2274527999.

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

The formula to convert Atmosphere (std) to cmH2O (4°C) is: cmH2O = atm × 1,033.2274527999. For example, to convert 10 Atmosphere (std) to cmH2O (4°C), you would multiply 10 by 1,033.2274527999.

What is a Atmosphere (std)?