Kilowatt Hours to Megajoules Converter for Canadian Bills and EVs
Convert kilowatt hours to megajoules instantly — ideal for hydro bills from Hydro-Québec or BC Hydro, natural gas charges in gigajoules, and EV battery specs. Free, accurate kWh to MJ calculator with the exact 3.6 factor.
Canadian Energy Converter & CalculatorThe quick answer for 1 Kilowatt Hours — type any value below for the exact result
Kilowatt Hours
Megajoules
kWh to MJ Conversion Formula
To convert kilowatt hours to megajoules, multiply the kWh value by 3.6. One kilowatt hour is 3,600,000 joules of electrical energy, and one megajoule is 1,000,000 joules, so the ratio is exactly 3.6 — no rounding involved.
Kilowatt Hours and Megajoules Explained
Kilowatt Hours (kwh)
The kilowatt hour (kWh) is the commercial unit of electrical energy: the energy delivered by one kilowatt of power sustained for one hour. Physically it is 3.6 megajoules or 3,600,000 joules. Electricity meters across Canada count kWh, making it the unit households see on every hydro bill — a typical Canadian home draws roughly 25-30 kWh per day, or about 900 kWh per month, though electrically heated homes in Quebec can use far more in winter.
Where it is used: Universal in electricity billing by Hydro-Québec, BC Hydro, Toronto Hydro, and Hydro One, plus EV battery specifications, solar system sizing, and EnerGuide appliance labels.
Origin: Grew out of early utility metering in the 1880s, when power companies needed a billable quantity tied to watts and hours; it remains the billing standard despite the SI preferring joules.
Megajoules (mj)
The megajoule (MJ) is one million joules, the SI-derived energy unit scaled for everyday quantities. One MJ runs a 1000 W microwave for about 17 minutes, and a litre of gasoline contains roughly 34.2 MJ. Canadian natural gas bills express energy in gigajoules (1 GJ = 1,000 MJ), while nutrition labels still use Calories, whose SI counterpart is the kilojoule.
Where it is used: Standard on natural gas bills from FortisBC and ATCO (as gigajoules), in heating and fuel engineering, EnerGuide home energy ratings, and scientific reporting.
Origin: A decimal multiple of the joule, formalized with SI prefixes; Canadian gas utilities adopted gigajoule billing as metrication replaced imperial units like the cubic foot and the therm.
Kilowatt Hours to Megajoules Conversion Table
| Kilowatt Hours (kwh) | Megajoules (mj) |
|---|---|
| 0.1 kwh | 0.36 mj |
| 0.25 kwh | 0.9 mj |
| 0.5 kwh | 1.8 mj |
| 1 kwh | 3.6 mj |
| 2 kwh | 7.2 mj |
| 5 kwh | 18 mj |
| 10 kwh | 36 mj |
| 15 kwh | 54 mj |
| 20 kwh | 72 mj |
| 30 kwh | 108 mj |
| 40 kwh | 144 mj |
| 50 kwh | 180 mj |
| 60 kwh | 216 mj |
| 100 kwh | 360 mj |
Megajoules to Kilowatt Hours Conversion Table
| Megajoules (mj) | Kilowatt Hours (kwh) |
|---|---|
| 1 mj | 0.2777777778 kwh |
| 2 mj | 0.5555555556 kwh |
| 5 mj | 1.3888888889 kwh |
| 10 mj | 2.7777777778 kwh |
| 20 mj | 5.5555555556 kwh |
| 50 mj | 13.8888888889 kwh |
| 100 mj | 27.7777777778 kwh |
| 200 mj | 55.5555555556 kwh |
| 400 mj | 111.1111111111 kwh |
| 1000 mj | 277.7777777778 kwh |
Kilowatt Hours to Megajoules in Everyday Objects
Common real-world examples that make Kilowatt Hours and Megajoules easy to picture at a glance.
| Kilowatt Hours (kwh) | Megajoules (mj) | |
|---|---|---|
| Charging a smartphone | 0.015 kwh | 0.054 mj |
| A dishwasher cycle | 1.2 kwh | 4.32 mj |
| A Tesla Powerwall 2 battery | 13.5 kwh | 48.6 mj |
| A day of household electricity in Toronto | 30 kwh | 108 mj |
| A 60 kWh EV battery (Chevrolet Bolt or Hyundai Kona) | 60 kwh | 216 mj |
| A month of household electricity in Canada | 900 kwh | 3240 mj |
When You Need Kilowatt Hours to Megajoules Conversions
Comparing Gas and Electricity Bills
FortisBC and ATCO bill natural gas in gigajoules while your hydro utility bills electricity in kWh. Converting a 90 kWh monthly electric charge to 324 MJ — or 0.324 GJ — lets you stack both fuel costs on one spreadsheet before choosing a retail plan.
EV Battery Spec Sheet Translation
Automakers quote pack sizes in kWh, but energy-density research papers use MJ. A 75 kWh long-range pack becomes 270 MJ — directly comparable with the ~34.2 MJ in each litre of gasoline you buy at the pump.
Home Battery and Solar Quotes
Installers mix units across brochures. Converting a quoted 13.5 kWh Powerwall to 48.6 MJ and a 10.5 kWh retrofit to 37.8 MJ makes storage options easy to rank against daily household demand of about 108 MJ.
Building Energy Audits
EnerGuide evaluators roll electricity (kWh) and natural gas (GJ) into one annual gigajoule rating. An office using 60,000 kWh per year reports 216 GJ — that is 216,000 MJ — for carbon accounting and building compliance filings.
Related Energy Conversions
How to Use
-
1
Enter Kilowatt Hours
Type the kWh value from your Hydro-Québec, BC Hydro, or Toronto Hydro statement, an EnerGuide appliance label, or an EV spec sheet — for example 30 kWh, roughly a typical Canadian household's daily electricity use
-
2
View Megajoules
The SI equivalent appears instantly: 30 kWh converts to 108 MJ, ready to line up against natural gas charges billed in gigajoules and fuel energy figures
-
3
Copy or Swap
Copy the result or click Swap to convert megajoules back to kilowatt hours for two-way energy comparisons
-
4
Compare Across Fuels
Put the result next to other energy figures: a 60 kWh EV battery (216 MJ) holds about as much energy as 6.3 litres of gasoline (34.2 MJ per litre), while one cubic metre of natural gas — the unit Enbridge Gas bills in — contains roughly 37.5 MJ
Why Use Be Converter?
Instant Conversion
Get precise kWh to MJ results in real-time as you type — handy for checking a Toronto Hydro or Hydro One statement or comparing EnerGuide appliance labels
Exact 3.6 Factor
Because 1 kWh = 3.6 MJ by definition, values like 10 kWh always convert to exactly 36 MJ with zero rounding error
Conversion Table
Quick reference covering home-scale values — 1 kWh (3.6 MJ), a 30 kWh day of household electricity (108 MJ), and a 60 kWh EV battery (216 MJ, the size in many Chevrolet Bolts and Hyundai Kona EVs)
Bidirectional
Easily swap between kilowatt hours and megajoules with one click — useful when natural gas bills from FortisBC or ATCO show energy in gigajoules (1 GJ = 1,000 MJ)
Free & No Signup
No registration required. Unlimited conversions. Completely free forever
Privacy First
All calculations happen in your browser. No data is sent to any server
Frequently Asked Questions
How many megajoules are in 1 kilowatt hour?
How do I convert 100 kWh to MJ?
Why do gas bills use MJ or GJ while electric bills use kWh?
Is kWh an SI unit?
How many MJ does a house use per day?
How many megajoules is a 60 kWh EV battery?
What is 10.5 kWh in MJ?
Which is bigger, a kWh or an MJ?
About Kilowatt Hours to Megajoules Converter
Our free online kilowatt hours to megajoules converter gives instant, accurate energy conversions for hydro bills, electric vehicles, and home energy evaluations. The kilowatt hour is the unit on every Canadian electricity bill — whether you're with Hydro-Québec, BC Hydro, Toronto Hydro, or Hydro One. The megajoule, and its big sibling the gigajoule, is the SI-scale unit behind natural gas billing: FortisBC and ATCO charge in GJ, Enbridge Gas bills in cubic metres, and EnerGuide evaluations rate whole homes in gigajoules per year. Because 1 kWh = 3.6 MJ exactly, and 1 GJ = 1,000 MJ, moving between electricity, gas, and fuel figures takes one quick multiplication. Whether you're weighing a gas furnace against electric baseboards, sizing a home battery for a Canadian winter, or checking an EV spec against gasoline's 34.2 MJ per litre, this tool keeps every figure on one consistent scale.
Expert Tips for kWh to MJ Conversion
The factor 3.6 is exact: 1 kW for 3600 seconds is 3,600,000 J. Use it at full precision — 250 kWh is exactly 900 MJ, no significant figures to worry about.
Canadian gas bills come in two flavours: FortisBC and ATCO charge per gigajoule, while Enbridge Gas in Ontario bills per cubic metre. To compare against your hydro bill, convert 1 GJ = 277.8 kWh, and 1 m³ ≈ 37.5 MJ ≈ 10.4 kWh, then divide each tariff by its own unit.
Home battery quick reference: Tesla Powerwall 2 = 13.5 kWh = 48.6 MJ; a typical 10.5 kWh retrofit unit = 37.8 MJ. Solar installers from Vancouver to Halifax often quote both.
For EV shopping, translate battery kWh to MJ (× 3.6) to compare with fuel energy: 1 litre of gasoline is about 34.2 MJ, so a 75 kWh (270 MJ) pack carries energy equal to roughly 8 litres of gas — worth remembering next time you fill up in litres.
Energy auditors: EnerGuide home evaluations report annual energy in gigajoules, and 1 GJ = 1,000 MJ = 277.8 kWh. Converting gas GJ and electric kWh into MJ puts a whole year of utility data — say, an Edmonton home's 150 GJ of gas plus 7,500 kWh of electricity — on one spreadsheet column.