Convert Centimeter of Water to Atmosphere
Enter the number of cmh₂o that you want to convert to atmospheres.
How to Convert cmH₂O to Atmospheres
The centimeter of water and atmosphere are both units of pressure. 1 atmosphere equals 1033.2274528 cmh₂o. This means to convert cmh₂o to atmospheres, you divide by 1033.2274528.
Formula
Step-by-Step Example
Convert 5 cmH₂O to atmospheres:
We need to convert cmh₂o to atmospheres
Since 1 atm = 1033.2274528 cmH₂O, divide by 1033.2274528
5 ÷ 1033.2274528 = 0.0048392055
5 cmH₂O = 0.0048392055 atm
Centimeter of Water to Atmosphere Conversion Table
Quick reference table for common centimeter of water to atmosphere conversions. Click any value for detailed calculation.
| cmH₂O (cmH₂O) | Atmospheres (atm) |
|---|---|
| 0.1 cmH₂O | 9.6784110535e-5 atm |
| 0.5 cmH₂O | 0.0004839206 atm |
| 1 cmH₂O | 0.0009678411 atm |
| 2 cmH₂O | 0.0019356822 atm |
| 5 cmH₂O | 0.0048392055 atm |
| 10 cmH₂O | 0.0096784111 atm |
| 25 cmH₂O | 0.0241960276 atm |
| 50 cmH₂O | 0.0483920553 atm |
| 100 cmH₂O | 0.0967841105 atm |
About These Units
Centimeter of Water (cmH₂O)
Centimeters of water (cmH₂O) measure low pressures in medical ventilators, CPAP machines (4-20 cmH₂O), HVAC systems, and manometers. One cmH₂O equals 98.07 Pascals. Based on the pressure exerted by a water column.
Atmosphere (atm)
One standard atmosphere (atm) equals 101,325 Pascals, 1.01325 bar, or 14.696 PSI—the average air pressure at sea level. Atmospheres measure diving depth (every 10 meters adds ~1 atm), altitude effects, and chemical reactions. Used as a reference pressure in science.
Frequently Asked Questions
How do I convert cmh₂o to atmospheres?
To convert cmh₂o to atmospheres, divide the value by 1033.2274528. For example, 10 cmH₂O = 0.0096784111 atm.
How many atmospheres are in 1 centimeter of water?
1 centimeter of water equals 0.0009678411 atmospheres.
What is the formula for cmh₂o to atmospheres?
The formula is: atm = cmH₂O ÷ 1033.2274528.