How to convert watts to watt-hours

How to convert electric power in watts (W) to energy in watt-hour (Wh).

You can calculate watt-hour from watts and hours, but you can't convert watts to watt-hour, since watts and watt-hour units represent different quantities.

Watts to watt-hour calculation formula

So The energy E in watt-hour (Wh) is equal to the power P in watts (W), times the time period t in hours (h).

E(Wh) = P(W) × t(h)

So

watt-hour = watts × hours

or

Wh = W × h

Example 1

What is the energy consumption in watt-hour when the power consumption is 4 watts for time duration of 3 hours?

E = 4W × 3h = 12 Wh

Example 2

What is the energy consumption in watt-hour when the power consumption is 6 watts for time duration of 3 hours?

E = 6W × 3h = 18 Wh

Example 3

What is the energy consumption in watt-hour when the power consumption is 8 watts for time duration of 3 hours?

E = 8W × 3h = 24 Wh

Example 4

What is the energy consumption in watt-hour when the power consumption is 10 watts for time duration of 3 hours?

E = 10W × 3h = 30 Wh

 

How to convert Wh to watts ►

 


See also

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