Quick Answer: Megawatt-hours to Kilowatt-hours
One megawatt-hour equals 1,000 kilowatt-hours (1 MWh = 1,000 kWh).
Conversely, 1 kWh = 0.001 MWh.
Formula: kWh = MWh × 1,000
Worked examples
- 0.1 MWh = 100 kWh
- 0.5 MWh = 500 kWh
- 1 MWh = 1,000 kWh
Method and limitations
Multiply megawatt-hours by 1,000 to express grid-scale energy in the household unit shown on your electricity meter. Calculations use full-precision constants; answers in this box are rounded for readability (≈ marks a rounded value) and the calculator shows up to 9 significant figures.
Each factor is exact by definition, derived from exact definitions, or a documented conventional value — see the methodology and sources.
Conversion Formula
Multiply megawatt-hours by 1,000 to express grid-scale energy in the household unit shown on your electricity meter.
Complete Guide to Megawatt-hours to Kilowatt-hours Conversion
What is a megawatt-hour?
A megawatt-hour (MWh) is 1,000 kWh, the working unit of commercial energy contracts, renewable generation reporting and wholesale electricity markets.
What is a kilowatt-hour?
A kilowatt-hour (kWh) is the household unit of electrical energy: one kilowatt for one hour. Meters, tariffs and battery specifications all use it.
How the Conversion Works
This is a pure SI prefix step. Kilo means one thousand and mega means one million, so a megawatt-hour is exactly one thousand kilowatt-hours. No physical constants are involved and the conversion is exact.
Why This Conversion Matters
Energy reporting spans nine orders of magnitude, from a phone battery in watt-hours to national demand in terawatt-hours. Moving fluently between kWh and MWh is what lets a homeowner understand a utility-scale press release, and what lets a business compare its consumption against a supply contract.
Scientific Context
SI prefixes scale by factors of 1,000: kilo (10³), mega (10⁶), giga (10⁹), tera (10¹²). Grid operators publish demand in GW and consumption in TWh, both derived from the same watt base unit.
Step-by-Step Conversion Guide
Follow these steps to convert megawatt-hours to kilowatt-hours manually:
Start with your value in megawatt-hours
Example: You want to convert 1 MWh
Apply the conversion formula
Use the formula: kWh = MWh × 1,000
Calculate the result
1 MWh = 1,000 kWh
Verify your answer
Use our calculator above to double-check your manual calculation.
Quick Mental Math Tip
Multiply megawatt-hours by 1,000 to express grid-scale energy in the household unit shown on your electricity meter.
Common Conversions
| Megawatt-hours (MWh) | Kilowatt-hours (kWh) | Kilowatt-hours → Megawatt-hours |
|---|---|---|
| 0.1 MWh | 100 | 0.1 kWh = 0.0001 MWh |
| 0.5 MWh | 500 | 0.5 kWh = 0.0005 MWh |
| 1 MWh | 1,000 | 1 kWh = 0.001 MWh |
| 2 MWh | 2,000 | 2 kWh = 0.002 MWh |
| 5 MWh | 5,000 | 5 kWh = 0.005 MWh |
| 10 MWh | 10,000 | 10 kWh = 0.01 MWh |
| 25 MWh | 25,000 | 25 kWh = 0.025 MWh |
| 50 MWh | 50,000 | 50 kWh = 0.05 MWh |
| 100 MWh | 100,000 | 100 kWh = 0.1 MWh |
| 500 MWh | 500,000 | 500 kWh = 0.5 MWh |
When You'll Need This Conversion
Commercial energy contracts
Power purchase agreements and business tariffs are priced per MWh.
Understanding solar farm output
Convert a project's annual MWh into the number of homes it could supply.
Energy reporting and journalism
Move between household and national scale without losing a factor of a thousand.
Battery storage projects
Grid batteries are specified in MWh of capacity and MW of output.
Pro Tips for Accurate Conversions
Sanity-check the order of magnitude
A home uses about 3.5–5 MWh per year. If your answer is 500 MWh for a house, you slipped a prefix.
Keep power and energy separate
MW is a rate, MWh is a quantity. Contracts nearly always price the MWh.
Use MWh for anything above 10,000 kWh
It reduces transcription errors in spreadsheets and reports.
Common Mistakes to Avoid
Writing MW when you mean MWh
This is the most common error in energy reporting and changes the meaning entirely.
Capacity is MW; production over a period is MWh.
Dividing by 100 instead of 1,000
A factor of ten error that survives review surprisingly often.
kWh ÷ 1,000 = MWh, always.
Comparing installed MW to consumed MWh
A 1 MW solar array does not produce 1 MWh every hour — output depends on irradiance.
Multiply capacity by capacity factor and hours to get MWh.
History & Background
As electricity systems scaled from single city blocks to national grids, reporting units climbed the SI prefix ladder from watt-hours to terawatt-hours within a century.
Key Milestones
The first central power stations serve a few hundred customers, measured in kWh.
National grid interconnection makes MWh and GWh the natural reporting units.
Wholesale electricity markets standardise on price per MWh.
Grid-scale batteries are procured in MWh of storage and MW of discharge power.
Global Usage Today
MWh is the global standard in wholesale power trading and renewable generation reporting; kWh remains universal for retail billing.
Frequently Asked Questions
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Conversion factors on this page are either exact by definition, derived from exact definitions, or conventional values in documented use. Each is listed with its source in our conversion methodology and sources, which cites the BIPM SI Brochure, NIST Special Publication 811 and the relevant IEC or national standards. Results are rounded for display only; calculations use full precision.