Convert Picojoules to Gigajoules
Convert Picojoules (pJ) to Gigajoules (GJ) instantly and accurately.
Conversion Formula
GJ = pJ × 1.000000000e-21
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 Gigajoules
A gigajoule (GJ) is 10⁹ J - the scale of fossil-fuel commodity volumes. One barrel of crude oil contains ~5.80 GJ; one metric tonne of hard coal ~29.3 GJ. Canadian energy bills express household consumption in GJ: average Canadian households use ~100-130 GJ/year. A 1 GW power plant at 33% efficiency burns ~10.9 GJ/h of fuel to generate 1 GWh = 3.6 GJ of electricity. Detonation of 1 tonne of TNT releases 4.184 GJ. 1 GJ = 10⁹ J = 277.78 kWh = 947,817 BTU = 9.4782 therms.
Quick Reference Table
| Picojoules (pJ) | Gigajoules (GJ) |
|---|---|
| 1 pJ | 1 × 10-21 GJ |
| 2 pJ | 2 × 10-21 GJ |
| 5 pJ | 5 × 10-21 GJ |
| 10 pJ | 1 × 10-20 GJ |
| 25 pJ | 2.5 × 10-20 GJ |
| 50 pJ | 5 × 10-20 GJ |
| 100 pJ | 1 × 10-19 GJ |