1 Pound/sq foot to Pound/sq inch
Quick answer
1 Pound/sq foot (psf) equals
0.006944 psi
To convert 1 Pound/sq feet to Pound/sq inches, multiply by 0.0069444444. Therefore, 1 Pound/sq foot (psf) equals 0.006944 Pound/sq inch (psi).
Formula: psi = psf × 0.0069444444. Calculation: 1 × 0.0069444444 = 0.006944 psi.
Convert Pound/sq foot (psf) to Pound/sq inch (psi) online with our free unit converter. In pressure, 1 psf = 0.006944 psi. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Pound/sq foot to Pound/sq inch
- Step 1 — start with the formula. psi = psf × 0.0069444444
- Step 2 — substitute your figure. 1 psf × 0.0069444444
- Step 3 — read the result. 1 psf = 0.006944 psi
- Step 4 — check it in reverse. psf = psi × 144 returns 0.9999 psf, which matches the figure you started with.
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
Pound/sq foot and Pound/sq inch Relationship
This calculation facilitates standardized conversion between recognized units of pressure. Since 1 Pound/sq foot represents a fraction of a Pound/sq inch (1 Pound/sq inch ≈ 144 Pound/sq feet), the Pound/sq inch is the larger measurement interval. Understanding the relationship between Pound/sq foot and Pound/sq inch is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Pound/sq foot
The Pound/sq foot (symbol: psf) is a recognized unit in the Standard measurement framework, utilized within pressure applications for precision and standardized data representation.
Common uses of Pound/sq foot: 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 of Pound/sq inch: tire pressure (US), hydraulics, HVAC.
Frequently Asked Questions
- What is 1 Pound/sq foot in Pound/sq inch?
- 1 Pound/sq foot equals 0.006944 Pound/sq inch.
- How many Pound/sq inches are in 1 Pound/sq foot?
- There are exactly 0.0069444444 Pound/sq inches 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 feet to Pound/sq inches, you would multiply 10 by 0.0069444444.
- What is a Pound/sq foot?
- The Pound/sq foot (symbol: psf) is a recognized unit in the Standard measurement framework, utilized within pressure applications for precision and standardized data representation.
- 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). 1 Pound/sq foot to Pound/sq inch. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/1-psf-to-psi