Pound/sq foot to Pound/sq inch Converter
Convert Pound/sq foot (psf) to Pound/sq inch (psi) instantly. 1 psf = 0.006944 psi.
Pressure Converter
29 units available
1 psf = 0.006944 psi
Formula:
psi = psf × 0.0069444444With your value: 1 psf = 0.00694444 psi
Other Pound/sq foot to Pound/sq inch conversions
Pound/sq foot to Pound/sq inch Conversion Table
| Pound/sq foot (psf) | Pound/sq inch (psi) |
|---|---|
| 0.5 | 0.003472 |
| 1 | 0.006944 |
| 2 | 0.013889 |
| 5 | 0.034722 |
| 10 | 0.069444 |
| 15 | 0.104167 |
| 20 | 0.138889 |
| 25 | 0.173611 |
| 50 | 0.347222 |
| 100 | 0.694444 |
| 250 | 1.736111 |
| 500 | 3.472222 |
| 1000 | 6.944444 |
Pound/sq inch to Pound/sq foot Conversion Table
| Pound/sq inch (psi) | Pound/sq foot (psf) |
|---|---|
| 0.5 | 72 |
| 1 | 144 |
| 2 | 288 |
| 5 | 720 |
| 10 | 1,440 |
| 15 | 2,160 |
| 20 | 2,880 |
| 25 | 3,600 |
| 50 | 7,200 |
| 100 | 14,400 |
| 250 | 36,000 |
| 500 | 72,000 |
| 1000 | 144,000 |
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 foot (psf)
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
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
How to Convert Pound/sq foot to Pound/sq inch
To convert from Pound/sq foot (psf) to Pound/sq inch (psi), multiply the value by 0.0069444444.
Formula: psi = psf × 0.0069444444
Reverse: psf = psi × 144
Step-by-Step Example
- Start with your value in Pound/sq foot. For example: 5 psf
- Multiply by the conversion factor: 5 x 0.0069444444
- The result is: 0.034722 psi
About Pound/sq foot
The pound/sq foot (psf) is a unit of pressure and stress. One pound/sq foot equals 47.88025898 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 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.
Frequently Asked Questions
How many Pound/sq inch are in 1 Pound/sq foot?
There are exactly 0.0069444444 Pound/sq inch in 1 Pound/sq foot. This means the conversion factor from Pound/sq foot to Pound/sq inch is 0.0069444444.
What is the formula to convert Pound/sq foot to Pound/sq inch?
The formula to convert Pound/sq foot to Pound/sq inch is: psi = psf × 0.0069444444. For example, to convert 10 Pound/sq foot to Pound/sq inch, you would multiply 10 by 0.0069444444.
What is a Pound/sq foot?
The pound/sq foot (psf) is a unit of pressure and stress. One pound/sq foot equals 47.88025898 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 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 are the common uses of Pound/sq foot?
The Pound/sq foot is commonly used in pressure calculations, engineering and science, education.
Related Pressure Conversions
Cite this page
UnitConvertLab. (2026). Pound/sq foot to Pound/sq inch converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/psf-to-psi