This is a pressure conversion. Pressure = force / area 1.5 kilograms per square centimeter is 21.3350158679 pounds per square inch. Scroll down to related links and look at "Conversion of pressure".

From the NASA link, below: "Earth's atmosphere is pressing against each square inch of you with a force of 1 kilogram per square centimeter (14.7 pounds per square inch)."

By using the kilogram to pounds conversion factor of 1 kg = 2.20462 lb (multiply kilos by 2.20462). Your units are a bit odd. Usually, pounds and cgs units are not mixed. Are you sure you don't want pounds per inch or pounds per foot, or even pounds per square inch?

1 square inch is 6.4516 square centimeter. That is an area calculation. Here is a calculator. Scroll down to related links and look at "Area Calculator".

1 kg/cm2 = 2.542 kg/in2 = 6.4516 kg/in2 = 2.206 x 6.4516 lb/in2 = 14.223 lb/in2 Each kilogram per square centimeter equals 14.223 pounds per square inch, so, for example, 5 kg/cm2 = 5 x 14.223 lb/in2 = 71.115 lb/in2

You mean calculation of an area = length times width in square centimeters or square inch. 1 square centimeter is 0.1550003 square inch. 1 square inch is 6.4516 square centimeter. Scroll down to related links and look at "Conversions of area (surface) units".