Convert Gigaamperes to Picoamperes
Convert Gigaamperes (GA) to Picoamperes (pA) instantly and accurately.
Conversion Formula
pA = GA × 1.000000000e+21
About Gigaamperes
The gigaampere (GA) equals 10⁹ A, a scale that lies beyond any man-made device and arises only in extreme astrophysical or geophysical contexts. Large-scale magnetospheric Birkeland field-aligned currents between Earth's ionosphere and magnetosphere are estimated at 1-10 MA total, well below 1 GA; however, pulsar magnetosphere discharge models and neutron-star lightning analogues are sometimes expressed in gigaampere terms. 1 GA = 10⁹ A = 10³ MA.
About Picoamperes
The picoampere (pA) equals 10⁻¹² A, the standard scale for electrometer measurements, reverse-bias diode leakage, and single ion-channel currents in patch-clamp electrophysiology. A typical open potassium channel carries 1-20 pA; high-quality electrometer inputs resolve below 1 pA; insulation resistance measurements on cables are reported in pA at known voltage. 1 pA = 10⁻³ nA = 10³ fA.
Quick Reference Table
| Gigaamperes (GA) | Picoamperes (pA) |
|---|---|
| 1 GA | 1 × 1021 pA |
| 2 GA | 2 × 1021 pA |
| 5 GA | 5 × 1021 pA |
| 10 GA | 1 × 1022 pA |
| 25 GA | 2.5 × 1022 pA |
| 50 GA | 5 × 1022 pA |
| 100 GA | 1 × 1023 pA |