**Definitions:**

**Pound Per Square Inch** (abbreviations: **psi, or lb/in2**): is a unit of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force of one pound-force applied to an area of one square inch.

**Kilopound Per Square Inch** (abbreviations: **ksi, or kips/in2**): is a unit of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force of one kilopound-force applied to an area of one square inch.

## How to Convert Pounds Per Square Inches to Kilopounds Per Square Inches

*Example: How many kilopounds per square inches are equivalent to 69.63 pounds per square inches?*

As;

1 pounds per square inches = 0.001 kilopounds per square inches

69.63 pounds per square inches = Y kilopounds per square inches

Assuming Y is the answer, and by criss-cross principle;

Y equals 69.63 times 0.001 over 1

(i.e.) Y = 69.63 * 0.001 / 1 = 0.06963 kilopounds per square inches

Answer is: 0.06963 kilopounds per square inches are equivalent to 69.63 pounds per square inches.

*Practice Question: Convert the following units into ksi:*

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 30.87 psi

( ii ) 55.06 psi

( iii ) 67.7 psi