Megajoules to Watt-Seconds Converter

Enter the energy in megajoules below to get the value converted to watt-seconds.


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Result in Watt-Seconds:

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1 MJ = 1,000,000 Ws

Do you want to convert watt-seconds to megajoules?

How to Convert Megajoules to Watt-Seconds

To convert a measurement in megajoules to a measurement in watt-seconds, multiply the energy by the following conversion ratio: 1,000,000 watt-seconds/megajoule.

Since one megajoule is equal to 1,000,000 watt-seconds, you can use this simple formula to convert:

watt-seconds = megajoules × 1,000,000

The energy in watt-seconds is equal to the energy in megajoules multiplied by 1,000,000.

For example, here's how to convert 5 megajoules to watt-seconds using the formula above.
watt-seconds = (5 MJ × 1,000,000) = 5,000,000 Ws

How Many Watt-Seconds Are in a Megajoule?

There are 1,000,000 watt-seconds in a megajoule, which is why we use this value in the formula above.

1 MJ = 1,000,000 Ws

Megajoules and watt-seconds are both units used to measure energy. Keep reading to learn more about each unit of measure.

What Is a Megajoule?

One megajoule is equal to 1,000,000 joules, which is the energy equal to the force on an object of one newton at a distance of one meter.

The megajoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "mega" is the prefix for millions, or 106. Megajoules can be abbreviated as MJ; for example, 1 megajoule can be written as 1 MJ.

Learn more about megajoules.

What Is a Watt-Second?

The watt-second is a measure of electrical energy equal to one watt of power over a one second period. One watt-second is equal to 1/3,600 of a watt-hour or one joule.

Watt-seconds are usually abbreviated as Ws, although the formally adopted expression is W·s. The abbreviation W s is also sometimes used. For example, 1 watt-second can be written as 1 Ws, 1 W·s, or 1 W s.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.[1]

Learn more about watt-seconds.

Megajoule to Watt-Second Conversion Table

Table showing various megajoule measurements converted to watt-seconds.
Megajoules Watt-seconds
0.000001 MJ 1 Ws
0.000002 MJ 2 Ws
0.000003 MJ 3 Ws
0.000004 MJ 4 Ws
0.000005 MJ 5 Ws
0.000006 MJ 6 Ws
0.000007 MJ 7 Ws
0.000008 MJ 8 Ws
0.000009 MJ 9 Ws
0.0000001 MJ 0.1 Ws
0.000001 MJ 1 Ws
0.00001 MJ 10 Ws
0.0001 MJ 100 Ws
0.001 MJ 1,000 Ws
0.01 MJ 10,000 Ws
0.1 MJ 100,000 Ws
1 MJ 1,000,000 Ws


  1. Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019,

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