Formula
kw=watts*qty/1000; kwhDay=kw*hours; totalKwh=kwhDay*days; cost=totalKwh*rate
Percent inputs are divided by 100 in the calculation. Unit conversions are shown in the results where applicable.
What the result means
The estimate shows metered energy cost for the listed equipment. It is useful for comparing duty schedules or efficient replacements, but it excludes demand charges, taxes, and equipment whose power varies.
Use measured wattage when possible. Nameplate wattage can differ from real consumption, especially for heaters and variable-speed pumps.