Convert Picojoules to Megawatt-Hours
Convert Picojoules (pJ) to Megawatt-Hours (MWh) instantly and accurately.
Conversion Formula
MWh = pJ × 2.777777778e-22
About Picojoules
A picojoule (pJ) is 10⁻¹² J - the scale of laser pulses in scientific instruments and chip-level capacitor storage. A 1 pF capacitor charged to 1 V stores exactly 0.5 pJ. Laser pulse energies in OCT and ultrafast spectroscopy are typically 1-1,000 pJ. Single-photon SNSPD detector dead-time dissipates 1-100 pJ per event. Phase-change memory cells (PCM, ReRAM) switch at 10-100 pJ per state transition, setting a lower bound on non-volatile memory energy efficiency. 1 pJ = 10⁻¹² J = 6.242 MeV.
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
| Picojoules (pJ) | Megawatt-Hours (MWh) |
|---|---|
| 1 pJ | 2.778 × 10-22 MWh |
| 2 pJ | 5.556 × 10-22 MWh |
| 5 pJ | 1.389 × 10-21 MWh |
| 10 pJ | 2.778 × 10-21 MWh |
| 25 pJ | 6.944 × 10-21 MWh |
| 50 pJ | 1.389 × 10-20 MWh |
| 100 pJ | 2.778 × 10-20 MWh |