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Watt-hours to Gigawatt-hours conversion

Unit	Result

How to convert Watt-hours to Gigawatt-hours

1 Watt-hours (Wh) is equal to 1e-9 Gigawatt-hours (GWh).

1 Wh = 1e-9 GWh
or
1 GWh = 1000000000 Wh

What is watt-hours?

A watt-hour is a unit of energy and its units, Wh, are formed with W for watt and h for hour from SI unit system. Its definition, in the context of electricity, is the energy of one watt power flowing for one hour.

Followings equivalent equations are identical but in different units.

1 Wh = 1 Pt = 1 IVt = 3600 J = 2.247 * 10^{22} eV = 8.598*10^5 cal

$P - Power$
$t - Time \text{ (in hours. Multiply by 3600 to convert to seconds)}$
$I - Current$ $V - Volts$
$J - Joules$
$eV - Electronvolt$
$cal - Calories$

Wikipedia page for Kilowatt-hour (watt-hour redirected to kWh) UCI article on Energy Units and Conversions Ian Woofenden's explanation on difference between Watts and Watt-Hours

What is gigawatt-hours?

A Gigawatt-hour is a unit of energy and its units, GWh, are formed with W for watt and h for hour from SI unit system combined with letter G, metric prefix, for 1,000,000,000 or $10^9$ . Its definition, in the context of electricity, is the energy of one watt power flowing for one hour.

Followings equivalent equations are identical but in different units. Please note that factor $10^9$ is representing Giga prefix in GWh unit.

1 GWh = 10^9*Pt = 10^9*IVt = 3600 * 10^9*J = 2.247 * 10^{22} * 10^9 eV = 8.598*10^5 * 10^9 cal