Convert Watt-Hours to Megawatt-Hours
Convert Watt-Hours (Wh) to Megawatt-Hours (MWh) instantly and accurately.
Conversion Formula
MWh = Wh × 1.000000000e-6
About Watt-Hours
A watt-hour (Wh) is the energy delivered by 1 watt for one hour - exactly 3,600 J. It is the practical unit for small-scale electrical energy: a 10,000 mAh 5 V power bank stores 50 Wh; a laptop battery holds 50-90 Wh; a smartphone battery holds 10-15 Wh; an AA alkaline cell stores ~3 Wh. LED lamps labelled 9 W save 51 Wh/h over a 60 W incandescent. IATA dangerous-goods rules use Wh as the threshold for lithium batteries in aircraft: cells >20 Wh and batteries >100 Wh need special approval. 1 Wh = 3,600 J = 3.412 BTU.
About Megawatt-Hours
A megawatt-hour (MWh) is the energy from 1 MW for one hour - exactly 3.6 GJ. It is the standard unit for wholesale electricity trading. Power purchase agreements (PPAs) specify capacity and price in $/MWh or €/MWh. A 5 MW wind turbine at full capacity generates 5 MWh/h. Primary aluminium smelting consumes 13-15 MWh per tonne. The Moss Landing battery (California) stores 3,287 MWh. The daily output of a 1 GW nuclear plant at 90% capacity factor is ~21,600 MWh. 1 MWh = 3.6 GJ = 3,412,141 BTU = 1,000 kWh.
Quick Reference Table
| Watt-Hours (Wh) | Megawatt-Hours (MWh) |
|---|---|
| 1 Wh | 1 × 10-6 MWh |
| 2 Wh | 2 × 10-6 MWh |
| 5 Wh | 5 × 10-6 MWh |
| 10 Wh | 1 × 10-5 MWh |
| 25 Wh | 2.5 × 10-5 MWh |
| 50 Wh | 5 × 10-5 MWh |
| 100 Wh | 1 × 10-4 MWh |