**PSI Full Form – What Does PSI Stand For?**

The short answer is that the full form of PSI or PSI stands for **“Pound per Square Inch”. **

In detail, the full form of PSI or PSI stands for **Pound per Square Inch**. One PSI is equal to the pressure which is exerted when one pound-force is applied to an area of one square inch.

It is a US customary and imperial unit of pressure. A pound per square inch is sometimes also referred to as a pound-force per square inch. 1 pound per square inch can be written as 1 psi.

**PSI can be expressed using the formula:**

1 psi = 1 * (lbf)/(in)^{2}

Pressure in pounds per square inch is equal to the pound-force divided by the area in square inches. So, PSI is the measurement of the force that applies to one square inch area.

**Uses Of PSI**

It is used to measure pressure in industrial and technical fields where gauge pressure measurements are needed. Pounds per square inch also used for things as simple as measuring tire pressure.

**How to calculate pounds per square inch or PSI?**

Pounds per square inch (PSI) is calculated from taking the total pound-force and dividing it by the area in inches squared.

**How to Convert Pounds Per Square Inch to Pounds Per Square Foot**?

To convert a pound per square inch measurement to a pound per square foot measurement, multiply the pressure by the conversion ratio. One pound per square inch is equal to 144 pounds per square foot, so use this simple formula to convert: pounds per square foot = pounds per square inch × 144

The pressure in pounds per square foot is equal to the pounds per square inch multiplied by 144.

**For Example**:

** How to convert 5 pounds per square inch to pounds per square foot?**

Byusing the formula above

5 psi = (5 × 144) = 720 psf

**Pounds Per Square Inch Measurement Conversion Tables**

pounds per square inch | pascals | hectopascals | atmospheres |

1 psi | 6,895 Pa | 68.9475 hPa | 0.068046 atm |

2 psi | 13,790 Pa | 137.895 hPa | 0.136092 atm |

3 psi | 20,684 Pa | 206.8425 hPa | 0.204138 atm |

4 psi | 27,579 Pa | 275.79 hPa | 0.272184 atm |

5 psi | 34,474 Pa | 344.7375 hPa | 0.340229 atm |

6 psi | 41,369 Pa | 413.685 hPa | 0.408275 atm |

7 psi | 48,263 Pa | 482.6325 hPa | 0.476321 atm |

8 psi | 55,158 Pa | 551.58 hPa | 0.544367 atm |

9 psi | 62,053 Pa | 620.5275 hPa | 0.612413 atm |

10 psi | 68,948 Pa | 689.475 hPa | 0.680459 atm |

11 psi | 75,842 Pa | 758.4225 hPa | 0.748505 atm |

12 psi | 82,737 Pa | 827.37 hPa | 0.816551 atm |

13 psi | 89,632 Pa | 896.3175 hPa | 0.884597 atm |

14 psi | 96,527 Pa | 965.265 hPa | 0.952642 atm |

15 psi | 103,421 Pa | 1,034 hPa | 1.020688 atm |

16 psi | 110,316 Pa | 1,103 hPa | 1.088734 atm |

17 psi | 117,211 Pa | 1,172 hPa | 1.15678 atm |

18 psi | 124,106 Pa | 1,241 hPa | 1.224826 atm |

19 psi | 131,000 Pa | 1,310 hPa | 1.292872 atm |

20 psi | 137,895 Pa | 1,379 hPa | 1.360918 atm |

pounds per square inch | bars | millibars | kilograms per square centimeter |

1 psi | 0.068948 bar | 68.9475 mbar | 0.070307 kgf/cm² |

2 psi | 0.137895 bar | 137.895 mbar | 0.140614 kgf/cm² |

3 psi | 0.206843 bar | 206.8425 mbar | 0.210921 kgf/cm² |

4 psi | 0.27579 bar | 275.79 mbar | 0.281228 kgf/cm² |

5 psi | 0.344738 bar | 344.7375 mbar | 0.351534 kgf/cm² |

6 psi | 0.413685 bar | 413.685 mbar | 0.421841 kgf/cm² |

7 psi | 0.482633 bar | 482.6325 mbar | 0.492148 kgf/cm² |

8 psi | 0.55158 bar | 551.58 mbar | 0.562455 kgf/cm² |

9 psi | 0.620528 bar | 620.5275 mbar | 0.632762 kgf/cm² |

10 psi | 0.689475 bar | 689.475 mbar | 0.703069 kgf/cm² |

11 psi | 0.758423 bar | 758.4225 mbar | 0.773376 kgf/cm² |

12 psi | 0.82737 bar | 827.37 mbar | 0.843683 kgf/cm² |

13 psi | 0.896318 bar | 896.3175 mbar | 0.913989 kgf/cm² |

14 psi | 0.965265 bar | 965.265 mbar | 0.984296 kgf/cm² |

15 psi | 1.034213 bar | 1,034 mbar | 1.054603 kgf/cm² |

16 psi | 1.10316 bar | 1,103 mbar | 1.12491 kgf/cm² |

17 psi | 1.172108 bar | 1,172 mbar | 1.195217 kgf/cm² |

18 psi | 1.241055 bar | 1,241 mbar | 1.265524 kgf/cm² |

19 psi | 1.310003 bar | 1,310 mbar | 1.335831 kgf/cm² |

20 psi | 1.37895 bar | 1,379 mbar | 1.406138 kgf/cm² |

pounds per square inch | kilograms per square meter | pounds per square foot | torr |

1 psi | 703.068836 kgf/m² | 144 psf | 51.714878 Torr |

2 psi | 1,406 kgf/m² | 288 psf | 103.429756 Torr |

3 psi | 2,109 kgf/m² | 432 psf | 155.144634 Torr |

4 psi | 2,812 kgf/m² | 576 psf | 206.859511 Torr |

5 psi | 3,515 kgf/m² | 720 psf | 258.574389 Torr |

6 psi | 4,218 kgf/m² | 864 psf | 310.289267 Torr |

7 psi | 4,921 kgf/m² | 1,008 psf | 362.004145 Torr |

8 psi | 5,625 kgf/m² | 1,152 psf | 413.719023 Torr |

9 psi | 6,328 kgf/m² | 1,296 psf | 465.433901 Torr |

10 psi | 7,031 kgf/m² | 1,440 psf | 517.148779 Torr |

11 psi | 7,734 kgf/m² | 1,584 psf | 568.863657 Torr |

12 psi | 8,437 kgf/m² | 1,728 psf | 620.578534 Torr |

13 psi | 9,140 kgf/m² | 1,872 psf | 672.293412 Torr |

14 psi | 9,843 kgf/m² | 2,016 psf | 724.00829 Torr |

15 psi | 10,546 kgf/m² | 2,160 psf | 775.723168 Torr |

16 psi | 11,249 kgf/m² | 2,304 psf | 827.438046 Torr |

17 psi | 11,952 kgf/m² | 2,448 psf | 879.152924 Torr |

18 psi | 12,655 kgf/m² | 2,592 psf | 930.867802 Torr |

19 psi | 13,358 kgf/m² | 2,736 psf | 982.582679 Torr |

20 psi | 14,061 kgf/m² | 2,880 psf | 1,034 Torr |

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