Pound/sq inch to cmH2O (4°C) Converter
Convert Pound/sq inch (psi) to cmH2O (4°C) (cmH2O) instantly. 1 psi = 70.306958 cmH2O.
Pressure Converter
29 units available
1 psi = 70.306958 cmH2O
Formula:
cmH2O = psi × 70.3069579639With your value: 1 psi = 70.30695796 cmH2O
Other Pound/sq inch to cmH2O (4°C) conversions
Pound/sq inch to cmH2O (4°C) Conversion Table
| Pound/sq inch (psi) | cmH2O (4°C) (cmH2O) |
|---|---|
| 0.5 | 35.153479 |
| 1 | 70.306958 |
| 2 | 140.613916 |
| 5 | 351.53479 |
| 10 | 703.06958 |
| 15 | 1,054.604369 |
| 20 | 1,406.139159 |
| 25 | 1,757.673949 |
| 50 | 3,515.347898 |
| 100 | 7,030.695796 |
| 250 | 17,576.739491 |
| 500 | 35,153.478982 |
| 1000 | 70,306.957964 |
cmH2O (4°C) to Pound/sq inch Conversion Table
| cmH2O (4°C) (cmH2O) | Pound/sq inch (psi) |
|---|---|
| 0.5 | 0.007112 |
| 1 | 0.014223 |
| 2 | 0.028447 |
| 5 | 0.071117 |
| 10 | 0.142233 |
| 15 | 0.21335 |
| 20 | 0.284467 |
| 25 | 0.355584 |
| 50 | 0.711167 |
| 100 | 1.422334 |
| 250 | 3.555836 |
| 500 | 7.111672 |
| 1000 | 14.223343 |
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.
Pound/sq inch (psi)
Pressure
1 psi = 1 lbf/in² = 6894.757 293 168 361 Pa exactly.
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
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 Pound/sq inch to cmH2O (4°C)
To convert from Pound/sq inch (psi) to cmH2O (4°C) (cmH2O), multiply the value by 70.3069579639.
Formula: cmH2O = psi × 70.3069579639
Reverse: psi = cmH2O × 0.0142233433
Step-by-Step Example
- Start with your value in Pound/sq inch. For example: 5 psi
- Multiply by the conversion factor: 5 x 70.3069579639
- The result is: 351.53479 cmH2O
About Pound/sq inch
Pounds per square inch (psi) is an imperial unit of pressure widely used in the US for tire pressure, hydraulics, and engineering.
Common uses: tire pressure (US), hydraulics, HVAC.
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 Pound/sq inch?
There are exactly 70.3069579639 cmH2O (4°C) in 1 Pound/sq inch. This means the conversion factor from Pound/sq inch to cmH2O (4°C) is 70.3069579639.
What is the formula to convert Pound/sq inch to cmH2O (4°C)?
The formula to convert Pound/sq inch to cmH2O (4°C) is: cmH2O = psi × 70.3069579639. For example, to convert 10 Pound/sq inch to cmH2O (4°C), you would multiply 10 by 70.3069579639.
What is a Pound/sq inch?
Pounds per square inch (psi) is an imperial unit of pressure widely used in the US for tire pressure, hydraulics, and engineering.
What is a 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.
What are the common uses of Pound/sq inch?
The Pound/sq inch is commonly used in tire pressure (US), hydraulics, HVAC.
Related Pressure Conversions
Cite this page
UnitConvertLab. (2026). Pound/sq inch to cmH2O (4°C) converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/psi-to-cmh2o