Converters

Mathematical conversion changes the units of measurement without changing the thing being measured. Conversion may involve units of measurement for the same type of quantity (e.g., length) within one or or across more than one systems of measurement. For example, metric vs. English. As an example, 1 inch in the English system is approximately equal to 2.54 cm in the metric system. Conversion may also involve quantities, e.g., volume, derived from obviously related quantities, e.g., length. A person can easily visualize a rectangular box with sides of specific dimensions. And that volume is calculated as the product of length, width, and depth.

The examples below involve more complicated ideas that are harder to visualize. For example, to calculate area irrigated by a pump, the converter accepts quantities based on length, time, pressure, and energy. These result in area.

Irrigation

Area irrigated by a pump – What is the maximum possible irrigated area from a specific horsepower pump?

Will a pump of a certain horsepower supply the irrigation area you need? Besides horsepower, you will need to enter the pump efficiency (somewhere between 55% and 80%). You will also need the maximum hours irrigation per week that are tolerable, worst-case expected evapotranspiration per week, expected pressure, and lift.

Pesticides

Full tank spray calculator for pesticides applied to large areas – How much pesticide should be added to a full tank to spray an area according to the label?

Partial tank spray calculator for pesticides applied to small areas – How much pesticide should be added to a partial tank to spray an area according to the label?