Conversion formulator is a comprehensive program to do any technical or professional conversion you may want. There is a section with area formulas has formulas for everything from Barrels, Cones, Cylinders and many more. There are 22 BTU conversions, 17 cubic conversions, and fractions to decimal conversion, 1- flow conversions. 10 ft. to lbs. conversion, 20 HVAC conversions, 13 Horsepower conversion, 42 Linear Measures conversions, Over 30 Liquid conversions, 10 Power Conversion, 15 pressure conversions. 3 Sand Conversions, 20 Square Measure conversion, 45 temperature conversions. 25 watts conversions. 185-weight conversions