What you get
Estimate battery runtime from capacity, voltage and power consumption.
How to use it
Enter only the requested values and check the unit shown beside each field. The main result gives the figure to use first. Details explain conversions, secondary quantities and rounding. Change any value to compare another situation without starting again.
Before using the result
Use the actual dimensions and specifications of the room or equipment. Usage, equipment efficiency and home conditions can change the final requirement or consumption.