Working in the oil filed, you may need to convert some unit values to another unit valves. I have some conversion unit specially used in the drilling and working over industry. I have 3 parts of the oil field conversion unit. This is the first part which is the conversion of Area, Circulation Rate, Impact Force.
The RED number is the conversion unit.
Area
Square inches x 6.45 = Square centimeters
Square inches x 645 = Square millimeters
Square centimeters x 0.155 = Square inches
Square millimeters x 0.00155 = Square inches
Circulation Rate
Barrels/min x 42 = Gallons/min
Cubic feet/min x 0.000472 = Cubic meters/sec
Cubic feet/min x 7.48 = Gallons/min
Cubic feel/mm x 28.32 = Liters/min
Cubic meters/sec x 15850 = Gallons/min
Cubic meters/sec x 2118 = Cubic feet/min
Cubic meters/sec x 60000 = Litres/min
Gallons/min x 0.0238 = Barrels/ruin
Gallons/min x 0.134 = Cubic feet/min
Gallons/min x 3.79 = Litres/min
Gallons/min x 0.00006309 = Cubic meters/sec
Litres/min x 0.00001667 = Cubic meters/sec
Litres/min x 0.0353 = Cubic feet/min
Litres/min x 0.264 = Gallons/min
Impact Force
Pounds x 0.0000445 = Dynes
Pounds x 0.454 = Kilograms
Pounds x 4.448 = Newtons
Dynes x0.00000225 = Pounds
Kilograms x 2.2 = Pounds
Newtons x 0.2248 = Pounds
I hope this conversion unit will be advantageous for you.
Ref book: Formulas and Calculations for Drilling, Production and Workover, Second Edition