Convert Henries to Attohenries
Convert Henries (H) to Attohenries (aH) instantly and accurately.
Conversion Formula
aH = H × 1.000000000e+18
About Henries
The henry (H) is the SI derived unit of electrical inductance, equal to 1 volt-second per ampere (1 V·s/A = 1 Ω·s = 1 kg·m²·A⁻²·s⁻²), named after Joseph Henry (1797-1878). Mains-frequency (50/60 Hz) power transformers have primary inductances of 1-100 H; loudspeaker crossover woofer inductors are 1-5 mH; large power-line reactors are 0.1-10 H. 1 H = 10³ mH = 10⁶ µH.
About Attohenries
The attohenry (aH) equals 10⁻¹⁸ H, the scale for parasitic inductances in on-chip metal interconnects and quantum-device bondwires. Metal traces in sub-10 nm CMOS processes have via-to-via inductances in the attohenry range; superconducting qubit junctions are modelled with loop inductances of tens to hundreds of attohenries; microwave integrated circuit (MMIC) vias at 100 GHz are characterised in aH. 1 aH = 10⁻³ fH = 10⁻¹⁸ H.
Quick Reference Table
| Henries (H) | Attohenries (aH) |
|---|---|
| 1 H | 1 × 1018 aH |
| 2 H | 2 × 1018 aH |
| 5 H | 5 × 1018 aH |
| 10 H | 1 × 1019 aH |
| 25 H | 2.5 × 1019 aH |
| 50 H | 5 × 1019 aH |
| 100 H | 1 × 1020 aH |