Select a category and enter your values below
To convert energy from gigawatt-hours (GWh) to kilowatt-hours (kWh), multiply by 1,000,000 (10⁶).
Giga is 10⁹ and kilo is 10³, so the two units sit exactly six decimal places apart. Divide by 10⁶ to go from kWh back to GWh.
A wind farm's annual report states a production of 310 GWh, and a comparison against average household consumption is wanted:
The six-zero expansion is what turns a utility statistic into a household-scale statement.
| GWh | kWh |
|---|---|
| 0.001 | 1,000 |
| 0.5 | 500,000 |
| 1 | 1,000,000 |
| 310 | 310,000,000 |
| 1,000 | 1,000,000,000 |
The kilowatt-hour is the retail unit of electricity — meters, bills and appliance labels speak nothing else — while the gigawatt-hour is the wholesale and statistical unit in which power-plant output, national consumption and utility procurement are reported. The conversion bridges the two whenever large-scale figures must be made tangible or small-scale figures aggregated: journalists translating a 500 GWh storage project into "enough for X homes for Y days," analysts rolling millions of smart-meter readings up into the GWh totals that balance-sheet and grid-operations reports use, or campus energy managers checking their 12 GWh annual consumption against utility tariff tiers written in kWh. Because the factor is a clean million, the risk is not arithmetic but plausibility drift — six zeros overwhelm intuition, and errors of a thousandfold (confusing GWh with MWh) routinely survive editing in news copy. The anchors that catch them: one large nuclear or coal unit generates roughly 8,000 GWh a year; a household uses 3,000–11,000 kWh a year depending on country. Any claim that stitches those two scales together should survive a division check on the back of an envelope.
How many gigawatt-hours are in one kilowatt-hour? One Kilowatt-hour (kWh) contains 10-6 Gigawatt-hours (GWh) — the inverse of the factor above. Multiplying by 106 takes you from gigawatt-hours to kilowatt-hours; multiplying by 10-6 brings you back.
Put in words: one gigawatt-hour equals 106 kilowatt-hours, so the gigawatt-hour is the larger unit of this pair. Converting between them never changes the amount of energy being measured — only the size of the unit you count it in.
Have you ever heard terms like "gigawatt-hour" and wondered what they actually mean?
Understanding energy units like the Gigawatt-hour (GWh) is key to grasping the scale of power generation and power consumption in our modern world.
This article breaks down what a GWh is, how it compares to other units, and why it's so crucial for measuring renewable energy.
A Gigawatt-hour (GWh) is a unit used to measure a massive amount of energy.
To be precise, one GWh is equivalent to 3.6 trillion Joules (3.6 × 1012 J).
So, how much energy is a GWh? A single gigawatt-hour is enough to power about 100,000 homes for a full day or a major city like San Francisco for several hours.
This unit is commonly used to describe the energy consumption of large cities or the output of major power plants, providing a tangible scale for understanding national or regional electricity usage.
The gigawatt-hour is part of a clear system of energy measurement.
One Gigawatt-hour (GWh) is equivalent to 1,000 Megawatt-hours (MWh) or 1,000,000 Kilowatt-hours (kWh).
While your monthly electricity bill is measured in the much smaller kilowatt-hour (kWh), utility-scale projects are measured in GWh. This highlights the vast difference between your home's energy use and the amount of power generated for an entire community.
Gigawatt-hours are a critical metric for tracking the output of large-scale renewable energy facilities, such as wind farms, solar arrays, and hydroelectric dams.
For example, a large offshore wind farm's annual energy production is often stated in GWh.
This allows for a direct comparison of its capacity to contribute to the power grid and displace fossil fuels.
A kilowatt-hour (kWh) is a measurement of energy. It's the standard unit your utility company uses to measure how much electricity you use.
While it has a technical definition (one kWh equals 3.6 million Joules), it's much easier to understand in terms of how you use appliances at home.
Your utility company uses the kilowatt-hour (kWh) to bill you for the total amount of electrical energy your home or business consumes over a period.
Every appliance, from your refrigerator to your television, has a power rating in watts.
When you use a 1,000-watt (or 1-kilowatt) appliance for one full hour, you consume exactly one kilowatt-hour of energy. This usage is tracked by your electric meter and shows up on your monthly bill.
A common point of confusion is the distinction between a kilowatt (kW) and a kilowatt-hour (kWh).
Here's a simple analogy to make it clear: Kilowatts (kW) are like your car's speed, and kilowatt-hours (kWh) are like the distance you travel.
Power (kW) measures how fast you're using energy right now (your speed).
Energy (kWh) measures the total amount of electricity you used over your entire journey (the distance you traveled).
To put it in perspective, one kilowatt-hour (kWh) is a significant amount of energy that can power various common household activities.
For example, a single kWh can let you:
This unit provides a tangible way to understand and track your daily energy consumption.
Here are some quick reference conversions from Gigawatt-hour (GWh) to Kilowatt-hour (kWh):
| Gigawatt-hours | Kilowatt-hours |
|---|---|
| 0.000001 GWh | 1 kWh |
| 0.001 GWh | 1000 kWh |
| 0.1 GWh | 105 kWh |
| 1 GWh | 106 kWh |
| 2 GWh | 2000000 kWh |
| 3 GWh | 3000000 kWh |
| 4 GWh | 4000000 kWh |
| 5 GWh | 5000000 kWh |
| 6 GWh | 6000000 kWh |
| 7 GWh | 7000000 kWh |
| 8 GWh | 8000000 kWh |
| 9 GWh | 9000000 kWh |
| 10 GWh | 107 kWh |
| 20 GWh | 20000000 kWh |
| 30 GWh | 30000000 kWh |
| 40 GWh | 40000000 kWh |
| 50 GWh | 50000000 kWh |
| 100 GWh | 108 kWh |
| 1000 GWh | 109 kWh |
| 10000 GWh | 1010 kWh |
Engineering datasheets across Europe write Gigawatt-hour to Kilowatt-hour several different ways. The calculation is the same in every one of them.
| Language | Written as | Unit names |
|---|---|---|
| French | GWh en kWh | gigawattheure → kilowattheure |
| Spanish | GWh a kWh | gigavatio-hora → kilovatio-hora |
| Dutch | GWh naar kWh | gigawattuur → kilowattuur |
| German | GWh in kWh | Gigawattstunde → Kilowattstunde |
| Polish | GWh na kWh | gigawatogodzina → kilowatogodzina |
For all Energy converters, choose units using the From/To dropdowns above.