Convert Attojoules to Picojoules
Convert Attojoules (aJ) to Picojoules (pJ) instantly and accurately.
Conversion Formula
pJ = aJ × 1.000000000e-6
About Attojoules
An attojoule (aJ) is 10⁻¹⁸ J - the scale of individual X-ray photons and superconducting qubit circuits. A 1 keV X-ray photon carries 160 aJ; a visible green photon (~550 nm) carries ~0.36 aJ. Josephson junction energies in superconducting qubits are set in tens to hundreds of aJ to achieve quantum coherence at millikelvin temperatures. XRISM's cryogenic TES X-ray spectrometer resolves individual photon energies at the hundreds-of-aJ level with ~7 eV FWHM resolution. 1 aJ = 10⁻¹⁸ J = 6.242 eV.
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.
Quick Reference Table
| Attojoules (aJ) | Picojoules (pJ) |
|---|---|
| 1 aJ | 1 × 10-6 pJ |
| 2 aJ | 2 × 10-6 pJ |
| 5 aJ | 5 × 10-6 pJ |
| 10 aJ | 1 × 10-5 pJ |
| 25 aJ | 2.5 × 10-5 pJ |
| 50 aJ | 5 × 10-5 pJ |
| 100 aJ | 0.0001 pJ |