Watt-Seconds to Megajoules Conversion (Ws to MJ)

Watt-Seconds to Megajoules Converter

Enter the energy in watt-seconds below to convert it to megajoules.

Result in Megajoules:

1 Ws = 1.0E-6 MJ

Hint: use a scientific notation calculator to convert E notation to decimal

How to Convert Watt-Seconds to Megajoules

To convert a measurement in watt-seconds to a measurement in megajoules, divide 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:

megajoules = watt-seconds ÷ 1,000,000

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

For example, here's how to convert 500,000 watt-seconds to megajoules using the formula above.

megajoules = (500,000 Ws ÷ 1,000,000) = 0.5 MJ

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

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.

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.

Watt-Second to Megajoule Conversion Table

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

Table showing various watt-second measurements converted to megajoules.

Watt-seconds

Megajoules

1 Ws

0.000001 MJ

2 Ws

0.000002 MJ

3 Ws

0.000003 MJ

4 Ws

0.000004 MJ

5 Ws

0.000005 MJ

6 Ws

0.000006 MJ

7 Ws

0.000007 MJ

8 Ws

0.000008 MJ

9 Ws

0.000009 MJ

10 Ws

0.00001 MJ

100 Ws

0.0001 MJ

1,000 Ws

0.001 MJ

10,000 Ws

0.01 MJ

100,000 Ws

0.1 MJ

1,000,000 Ws

1 MJ

References

Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf