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Single conversion
To convert from Megajoule (MJ) to Watt-minute (Wm), use the following formula:
Let's convert 5 Megajoule (MJ) to Watt-minute (Wm).
Using the formula:
Therefore, 5 Megajoule (MJ) is equal to Watt-minute (Wm).
Here are some quick reference conversions from Megajoule (MJ) to Watt-minute (Wm):
| Megajoules | Watt-minutes |
|---|---|
| 0.000001 MJ | Wm |
| 0.001 MJ | Wm |
| 0.1 MJ | Wm |
| 1 MJ | Wm |
| 2 MJ | Wm |
| 3 MJ | Wm |
| 4 MJ | Wm |
| 5 MJ | Wm |
| 6 MJ | Wm |
| 7 MJ | Wm |
| 8 MJ | Wm |
| 9 MJ | Wm |
| 10 MJ | Wm |
| 20 MJ | Wm |
| 30 MJ | Wm |
| 40 MJ | Wm |
| 50 MJ | Wm |
| 100 MJ | Wm |
| 1000 MJ | Wm |
| 10000 MJ | Wm |
For all Energy converters, choose units using the From/To dropdowns above.
Ever looked at a food label outside the US or heard about the energy of a lightning bolt and seen the term 'megajoule' or 'MJ'?
What exactly is it?
In this simple guide, we'll break down what a megajoule is, how big it is, and where you'll see it used in everyday life and science.
A Megajoule (MJ) is a unit of energy in the International System of Units (SI), equal to one million Joules (106 J).
The plural form is Megajoules.
To visualize the energy in a single megajoule, it helps to use a powerful real-world comparison.
One megajoule (1 MJ) is roughly the same as the kinetic energy of a one-tonne car traveling at 160 km/h (about 100 mph).
This comparison shows just how much energy a single megajoule represents, making it a key unit for measuring large energy transfers in fields like physics and engineering.
In many countries, including Australia and New Zealand, the megajoule (MJ) and kilojoule (kJ) are the standard units on nutritional labels to measure the energy content of food, instead of Calories (kcal).
To understand these labels, it's helpful to know the conversion:
One megajoule (MJ) is equal to approximately 239 food Calories (kcal).
This makes the MJ a critical unit for international dietary and health management.
The megajoule is a common unit for quantifying large-scale energy events and outputs in science and technology.
For example:
A Watt-minute (Wm) is a unit of energy that measures the total energy consumed when one watt of power is applied for exactly one minute.
The plural form is Watt-minutes.
To make it easier to understand, think of it like filling a bucket with a hose. If a watt is the speed at which water flows, a Watt-minute is the total amount of water in the bucket after the hose has been running for one minute.
One Watt-minute is precisely equal to 60 Joules (J).
This conversion is simple because a watt is defined as one joule per second (1 W = 1 J/s). Since there are 60 seconds in a minute, the calculation is straightforward:
1 Watt-minute = 1 Watt × 60 seconds = 60 Joules
This simple formula makes the Wm to J conversion easy to remember for any energy calculation.
While you're more likely to see Watt-hours (Wh) or kilowatt-hours (kWh) on your electricity bill, the Watt-minute is an essential unit for more precise energy measurement in specific fields.
It's most useful in situations where energy is tracked over short intervals, such as: