When should I use MWh instead of kWh?

Once annual consumption passes a few thousand kWh — commercial buildings, solar farms, grid statistics and power purchase agreements are all quoted in MWh or GWh.

How many homes does 1 MWh supply?

About 2.6 average European households for one day, or roughly one household for ten weeks of electricity.

How does MWh relate to MW?

MW is power, MWh is energy. A 1 MW solar farm producing at full output for one hour generates 1 MWh.

kWh to MWh Converter | Kilowatt-hours to Megawatt-hours

Conversion Formula

MWh = kWh ÷ 1,000

A megawatt-hour is one thousand kilowatt-hours. Divide by 1,000 to move from household scale to grid and commercial scale.

Complete Guide to Kilowatt-hours to Megawatt-hours Conversion

What is a Kilowatt-hours?

A kilowatt-hour (kWh) is the household unit of electrical energy: one kilowatt for one hour. Meters, tariffs and battery specifications all use it.

What is a Megawatt-hours?

A megawatt-hour (MWh) is 1,000 kWh, the working unit of commercial energy contracts, renewable generation reporting and wholesale electricity markets.

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 kilowatt-hours to megawatt-hours manually:

Start with your value in kilowatt-hours

Example: You want to convert 1000 kWh

Apply the conversion formula

Use the formula: MWh = kWh ÷ 1,000

Calculate the result

1000 kWh = 1 MWh

✓

Verify your answer

Use our calculator above to double-check your manual calculation.

Quick Mental Math Tip

A megawatt-hour is one thousand kilowatt-hours. Divide by 1,000 to move from household scale to grid and commercial scale.

Common Conversions

Kilowatt-hours to Megawatt-hours conversion table
Kilowatt-hours (kWh)	Megawatt-hours (MWh)	Megawatt-hours → Kilowatt-hours
100	0.1	100 MWh = 100000 kWh
500	0.5	500 MWh = 500000 kWh
1000	1	1000 MWh = 1000000 kWh
2500	2.5	2500 MWh = 2500000 kWh
5000	5	5000 MWh = 5000000 kWh
10000	10	10000 MWh = 10000000 kWh
25000	25	25000 MWh = 25000000 kWh
50000	50	50000 MWh = 50000000 kWh
100000	100	100000 MWh = 100000000 kWh

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.