Skip to content
RK Calculator
Menu

Joules to Megawatt-hours Converter

Convert joules (watt-seconds) (J) to megawatt-hours (MWh), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
2.77777777778 × 10⁻¹⁰ MWh
kilojoules
0.001 kJ
megajoules
1 × 10⁻⁶ MJ
gigajoules
1 × 10⁻⁹ GJ
calories (thermochemical)
0.239005736138 cal
kilocalories (food Calories)
0.000239005736138 kcal
megacalories
2.39005736138 × 10⁻⁷ Mcal
watt-hours
0.000277777777778 Wh
kilowatt-hours
2.77777777778 × 10⁻⁷ kWh
British thermal units (IT)
0.000947817120313 Btu
million Btu
9.47817120313 × 10⁻¹⁰ MMBtu
therms (100,000 Btu)
9.47817120313 × 10⁻⁹ thm
quads (10¹⁵ Btu)
9.47817120313 × 10⁻¹⁹ quad
electronvolts
6.24150907446 × 10¹⁸ eV
kiloelectronvolts
6.24150907446 × 10¹⁵ keV
megaelectronvolts
6,241,509,074,460 MeV

1 J = 2.77777777778 × 10⁻¹⁰ MWh

Show the working
  1. 1 J = 2.77777777778e-10 MWh
  2. 1 × 2.77777777778e-10 = 2.77777777778e-10 MWh

How to convert joules to megawatt-hours

1 MWh = 3,600,000,000 J, so divide by 3,600,000,000 to go from joules (watt-seconds) to megawatt-hours (1 J = 2.77777777778 × 10⁻¹⁰ MWh).

MWh = J ÷ 3,600,000,000
J = MWh × 3,600,000,000

Worked example:

1 J = 2.77777777778e-10 MWh
5 × 2.77777777778e-10 = 1.38888888889e-9 MWh

Joules to megawatt-hours table

JoulesMegawatt-hours
1 J2.77777777778 × 10⁻¹⁰ MWh
2 J5.55555555556 × 10⁻¹⁰ MWh
3 J8.33333333333 × 10⁻¹⁰ MWh
4 J1.11111111111 × 10⁻⁹ MWh
5 J1.38888888889 × 10⁻⁹ MWh
6 J1.66666666667 × 10⁻⁹ MWh
7 J1.94444444444 × 10⁻⁹ MWh
8 J2.22222222222 × 10⁻⁹ MWh
9 J2.5 × 10⁻⁹ MWh
10 J2.77777777778 × 10⁻⁹ MWh
15 J4.16666666667 × 10⁻⁹ MWh
20 J5.55555555556 × 10⁻⁹ MWh
25 J6.94444444444 × 10⁻⁹ MWh
30 J8.33333333333 × 10⁻⁹ MWh
40 J1.11111111111 × 10⁻⁸ MWh
50 J1.38888888889 × 10⁻⁸ MWh
75 J2.08333333333 × 10⁻⁸ MWh
100 J2.77777777778 × 10⁻⁸ MWh
250 J6.94444444444 × 10⁻⁸ MWh
500 J1.38888888889 × 10⁻⁷ MWh
1000 J2.77777777778 × 10⁻⁷ MWh

About the units

Joules (J)
Joules (watt-seconds), a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).
Megawatt-hours (MWh)
Megawatt-hours, a metric unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).

Formula version 0.1.0Reviewed