The last part of unit conversion is the conversion for **Pressure**,**Velocity, ****Volume** and **Weight **specially used in the oilfield.

The **RED** number is the conversion unit.

**Pressure**

Atmospheres x 14.696 = Pounds/sq inch

Atmospheres x 1.033 = Kilograms/sq cm

Atmospheres x 101300 = Pascals

Kilograms/sq cm x 0.9678 = Atmospheres

Kilograms/sq cm x 14.223 = Pounds/sq inch

Kilograms/sq cm x 0.9678 = Atmospheres

Pounds/sq inch x 0.068 = Atmospheres

Pounds/sq inch x 0.0703 = Kilograms/sq cm

Pounds/sq inch x 0.006894 = Pascals

**Velocity**

Feet/sec x 0.305 = Meters/sec

Feet/mm x 0.00508 = Meters/sec

Meters/sec x 196.8 = Feet/mm

Meters/sec x 3.28 = Feet/sec

**Volume**

Barrels x 42 = Gallons

Cubic centimeters x 0.00003531 = Cubic feet

Cubic centimeters x 0.06102 = Cubic inches

Cubic centimeters x 0.000001 = Cubic meters

Cubic centimeters x 0.000264 = Gallons

Cubic centimeters x 0.001 = Litters

Cubic feet x 28320 = Cubic centimeters

Cubic feet x 1728 = Cubic inches

Cubic feet x 0.02832 = Cubic meters

Cubic feet x 7.48 = Gallons

Cubic feet x 28.32 = Litters

Cubic inches x 16.39 = Cubic centimeters

Cubic inches x 0.0005787 = Cubic feet

Cubic inches x 0.00001639 = Cubic meters

Cubic inches x 0.004329 = Gallons

Cubic inches x 0.01639 = Liters

Cubic meters x 1000000 = Cubic centimeters

Cubic meters x 35.31 = Cubic feet

Cubic meters x 264.2 = Gallons

Gallons x 0.0238 = Barrels

Gallons x 3785 = Cubic centimeters

Gallons x 0.1337 = Cubic feet

Gallons x 231 = Cubic inches

Gallons x 0.003785 = Cubic meters

Gallons x 3.785 = Liters

**Weight**

Pounds x 0.0004535 = Tons (metric)

Tons (metric) x 2205 = Pounds

Tons (metric) x 1000 = Kilograms

**Ref book: ** **Formulas and Calculations for Drilling, Production and Workover, Second Edition**