Calculate pulley ratios and speeds
Driven RPM = Driver RPM x (Driver Diameter / Driven Diameter)
V=IR calculations
Electrical wiring
Heating/cooling load
Area measurement
Concrete volume needed
Resistor color code
Electrical calculations
Engine power
Roofing materials
Stair dimensions
Tile quantity needed
Mulch volume
Gravel volume
Pipe capacity
Heater size needed
Insulation needed
Fencing materials
Drywall sheets needed
Paint quantity needed
Flooring materials