Pound/sq inch to ftH2O (4°C) Converter
Convert Pound/sq inch (psi) to ftH2O (4°C) (ftH2O) instantly. 1 psi = 2.306659 ftH2O.
Pressure Converter
29 units available
1 psi = 2.306659 ftH2O
Formula:
ftH2O = psi × 2.3066587413With your value: 1 psi = 2.30665874 ftH2O
Other Pound/sq inch to ftH2O (4°C) conversions
Pound/sq inch to ftH2O (4°C) Conversion Table
| Pound/sq inch (psi) | ftH2O (4°C) (ftH2O) |
|---|---|
| 0.5 | 1.153329 |
| 1 | 2.306659 |
| 2 | 4.613317 |
| 5 | 11.533294 |
| 10 | 23.066587 |
| 15 | 34.599881 |
| 20 | 46.133175 |
| 25 | 57.666469 |
| 50 | 115.332937 |
| 100 | 230.665874 |
| 250 | 576.664685 |
| 500 | 1,153.329371 |
| 1000 | 2,306.658741 |
ftH2O (4°C) to Pound/sq inch Conversion Table
| ftH2O (4°C) (ftH2O) | Pound/sq inch (psi) |
|---|---|
| 0.5 | 0.216764 |
| 1 | 0.433528 |
| 2 | 0.867055 |
| 5 | 2.167638 |
| 10 | 4.335275 |
| 15 | 6.502913 |
| 20 | 8.67055 |
| 25 | 10.838188 |
| 50 | 21.676375 |
| 100 | 43.35275 |
| 250 | 108.381875 |
| 500 | 216.763751 |
| 1000 | 433.527501 |
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
ftH2O (4°C) (ftH2O)
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 ftH2O (4°C)
To convert from Pound/sq inch (psi) to ftH2O (4°C) (ftH2O), multiply the value by 2.3066587413.
Formula: ftH2O = psi × 2.3066587413
Reverse: psi = ftH2O × 0.4335275011
Step-by-Step Example
- Start with your value in Pound/sq inch. For example: 5 psi
- Multiply by the conversion factor: 5 x 2.3066587413
- The result is: 11.533294 ftH2O
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 ftH2O (4°C)
The fth2o (4°c) (ftH2O) is a unit of pressure and stress. One fth2o (4°c) equals 2989.0669 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 ftH2O (4°C) are in 1 Pound/sq inch?
There are exactly 2.3066587413 ftH2O (4°C) in 1 Pound/sq inch. This means the conversion factor from Pound/sq inch to ftH2O (4°C) is 2.3066587413.
What is the formula to convert Pound/sq inch to ftH2O (4°C)?
The formula to convert Pound/sq inch to ftH2O (4°C) is: ftH2O = psi × 2.3066587413. For example, to convert 10 Pound/sq inch to ftH2O (4°C), you would multiply 10 by 2.3066587413.
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 ftH2O (4°C)?
The fth2o (4°c) (ftH2O) is a unit of pressure and stress. One fth2o (4°c) equals 2989.0669 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 ftH2O (4°C) converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/psi-to-fth2o