Watt-Seconds to Megawatt-Hours Converter

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


Result in Megawatt-Hours:

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1 Ws = 2.7778E-10 MWh
Hint: use a scientific notation calculator to convert E notation to decimal

Do you want to convert megawatt-hours to watt-seconds?

How to Convert Watt-Seconds to Megawatt-Hours

To convert a measurement in watt-seconds to a measurement in megawatt-hours, divide the energy by the following conversion ratio: 3,600,000,000 watt-seconds/megawatt-hour.

Since one megawatt-hour is equal to 3,600,000,000 watt-seconds, you can use this simple formula to convert:

megawatt-hours = watt-seconds ÷ 3,600,000,000

The energy in megawatt-hours is equal to the energy in watt-seconds divided by 3,600,000,000.

For example, here's how to convert 5,000,000,000 watt-seconds to megawatt-hours using the formula above.
megawatt-hours = (5,000,000,000 Ws ÷ 3,600,000,000) = 1.388889 MWh

Watt-seconds and megawatt-hours 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 Megawatt-Hour?

A megawatt-hour is a measure of electrical energy equal to one megawatt, or 1,000,000 watts, of power over a one hour period. Megawatt-hours are a measure of electrical work performed over a period of time, and are often used as a way of measuring energy usage by electric companies.

Megawatt-hours are usually abbreviated as MWh, although the formally adopted expression is MW·h. The abbreviation MW h is also sometimes used. For example, 1 megawatt-hour can be written as 1 MWh, 1 MW·h, or 1 MW h.

Learn more about megawatt-hours.

Watt-Second to Megawatt-Hour Conversion Table

Table showing various watt-second measurements converted to megawatt-hours.
Watt-seconds Megawatt-hours
1 Ws 0.00000000027778 MWh
2 Ws 0.00000000055556 MWh
3 Ws 0.00000000083333 MWh
4 Ws 0.0000000011111 MWh
5 Ws 0.0000000013889 MWh
6 Ws 0.0000000016667 MWh
7 Ws 0.0000000019444 MWh
8 Ws 0.0000000022222 MWh
9 Ws 0.0000000025 MWh
10 Ws 0.0000000027778 MWh
100 Ws 0.000000027778 MWh
1,000 Ws 0.00000027778 MWh
10,000 Ws 0.0000027778 MWh
100,000 Ws 0.000027778 MWh
1,000,000 Ws 0.000278 MWh
10,000,000 Ws 0.002778 MWh
100,000,000 Ws 0.027778 MWh
1,000,000,000 Ws 0.277778 MWh
10,000,000,000 Ws 2.7778 MWh


  1. 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

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