MWh = kW × hours ÷ 1,000
Multiply by time, then step up one SI prefix.
A 2,500 kW unit running flat out for a full day produces 60 MWh. Over a year at perfect availability it would produce 21,900 MWh — a figure no real plant reaches.
kW to MWh
Convert a continuous power output into megawatt-hours for generation reports and site energy accounting.
Need the power figure before the energy figure? Work it out with the kVA to kW converter first.
kW to MWh Calculator
MWh = kW × hours ÷ 1,0002,500 kW
kW
24 h
h
Quick values
At a glance
MWh = kW × hours ÷ 1,000
- Energy generated
- 60 MWh
- Power output
- 2,500 kW
- Operating time
- 24 h
Every diagram and table on this page updates with the calculator above.
Output
Live60MWh
MWh = (2,500 kW × 24 h) ÷ 1,000 = 60 MWh
In kilowatt-hours60,000 kWh
In gigajoules216 GJ
The kW to MWh Formula
The conversion
LiveInput2,500kW
Result60MWh
Output Across a Reporting Period
Generation reports cover a day, a month, a quarter or a year. The area below shows how quickly megawatt-hours accumulate at your output level — use the presets to jump between the standard windows.
Output over time
LiveEnergy delivered60 MWh
The Reporting Periods That Matter
| Period | Hours | Used for |
|---|---|---|
| Half hour | 0.5 | Settlement and imbalance markets |
| Day | 24 | Operational reporting and dispatch |
| Month | 730 | Invoicing and availability payments |
| Quarter | 2,190 | Regulatory and board reporting |
| Year | 8,760 | Capacity factor and carbon accounting |
The 8,760-hour year is the anchor for almost every generation statistic. Multiply capacity by 8,760 and you have the theoretical maximum; everything else is a fraction of it.
Period chart
Live| h | Energy (MWh) | Energy (GJ) |
|---|---|---|
| 1 h | 2.5 | 9 |
| 8 h | 20 | 72 |
| 12 h | 30 | 108 |
| 24 h | 60 | 216 |
| 48 h | 120 | 432 |
| 168 h | 420 | 1,512 |
| 336 h | 840 | 3,024 |
| 730 h | 1,825 | 6,570 |
| 2,190 h | 5,475 | 19,710 |
| 4,380 h | 10,950 | 39,420 |
| 8,760 h | 21,900 | 78,840 |
Capacity Factor and Real Output
Nameplate capacity multiplied by 8,760 hours gives a theoretical annual maximum. Real plants deliver a fraction of it because of maintenance, demand, fuel availability and — for renewables — the weather.
Capacity factor = actual MWh ÷ (MW × 8,760)
Expressed as a percentage, it is the single most useful figure for comparing projects.
A 2.5 MW turbine over a year
Given
- Capacity: 2,500 kW
- Capacity factor: 32%
Working
- Maximum = 2,500 × 8,760 ÷ 1,000 = 21,900 MWh
- Actual = 21,900 × 0.32
About 7,008 MWh a year — roughly the consumption of 1,800 average homes.
Three reporting windows
LiveOne day
- Energy
- 60 MWh
- Energy
- 216 GJ
One month
- Energy
- 1,825 MWh
- Energy
- 6,570 GJ
One year
- Energy
- 21,900 MWh
- Energy
- 78,840 GJ
MWh, GJ and GWh Side by Side
| Unit | Equal to | Where it is used |
|---|---|---|
| 1 kWh | 3.6 MJ | Retail electricity bills |
| 1 MWh | 1,000 kWh = 3.6 GJ | Wholesale trading, plant reporting |
| 1 GWh | 1,000 MWh | Regional and utility statistics |
| 1 TWh | 1,000 GWh | National energy accounts |
| 1 GJ | 277.8 kWh | Gas and district heating bills |
Keep capacity and energy apart
MW is a rate, MWh is an amount. A plant is "50 MW" but produces "300 MWh a day". Mixing the two is the commonest error in energy reporting.
Energy scale
Live1 MWh
100 MWh
10 GWh
1 TWh
60 MWh
How Plants Actually Report Output
- Meter at the boundary
Export metering sits at the point of connection, so station auxiliaries are already netted off.
- Aggregate half-hourly
Settlement data arrives in half-hour blocks; summing them gives the daily total directly.
- Separate gross and net
Gross generation includes what the plant consumes itself; net is what reaches the grid.
- Report availability alongside
MWh without availability hides whether a shortfall was market-driven or a breakdown.
- Period boundaries match the settlement calendar.
- Gross and net figures are labelled unambiguously.
- Auxiliary consumption is accounted for once, not twice.
- Capacity factor is quoted against nameplate, not available capacity.
- Units are stated explicitly — MWh and MW are one character apart.
Annual accumulation
Live24 Operating hours60 MWh
Every Power Converter in One Place
29 calculators built on the same maths as the tool above. Each one has its own inputs, interactive diagrams and worked examples.
kW to kVA
kVA = kW ÷ PFkVA to MW
MW = kVA × PF ÷ 1,000kVA to MVA
MVA = kVA ÷ 1,000VA to kVA
kVA = VA ÷ 1,000VA to kW
kW = VA × PF ÷ 1,000kVA to Watts
W = kVA × 1,000 × PFkW to Watts
W = kW × 1,000kW to GW
GW = kW ÷ 1,000,000kVA to kW (Single Phase)
kW = kVA × PFkVA to Amps
A = kVA × 1,000 ÷ (V × √3 for 3-phase)kVA to Amps (Three Phase)
A = kVA × 1,000 ÷ (√3 × V)Amps to kW
kW = √3 × V × A × PF ÷ 1,000kW to Volts
V = kW × 1,000 ÷ (√3 × A × PF)kW to kWh
kWh = kW × hoursCurrent
kW to MWh
MWh = kW × hours ÷ 1,000kW to GJ
GJ = kW × hours × 0.0036kW to kJ
kJ = kW × secondskW to Joules
J = kW × 1,000 × secondskW to HP
hp = kW × 1.34102kW to BHP
bhp = kW × 1.34102kW to Nm
N·m = 9549.3 × kW ÷ rpmkW to Torque
T = 9549.3 × kW ÷ rpmkW to RPM
rpm = 9549.3 × kW ÷ N·mkW to CC
cc = (kW ÷ kW per litre) × 1,000kW to BTU/hr
BTU/hr = kW × 3,412.142kW to Ton
TR = kW ÷ 3.51685kW to GPM
GPM = BTU/hr ÷ (500 × ΔT)kW to CFM
CFM = BTU/hr ÷ (1.08 × ΔT)kW to PSI
bar = kW × η × 600 ÷ L/minkW to MWh Questions
Common questions about converting kw to mwh.
Multiply kilowatts by hours and divide by 1,000: MWh = kW × hours ÷ 1,000.
24 MWh at full continuous output. Over a year at 100% availability it would be 8,760 MWh.
MW is capacity — the rate of delivery. MWh is the energy actually delivered over a period of time.
Actual energy produced divided by the energy that would be produced at full output for the same period, expressed as a percentage.
Exactly 1,000 kWh. An MWh is also about 3.6 GJ.
Gross includes electricity the plant consumes itself for pumps, fans and controls. Net is what actually reaches the grid.