Convert Gigaamperes to Milliamperes
Convert Gigaamperes (GA) to Milliamperes (mA) instantly and accurately.
Conversion Formula
mA = GA × 1000000000000
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 Milliamperes
The milliampere (mA) equals 10⁻³ A, the everyday unit in consumer electronics and safety standards. Standard LEDs operate at 5-30 mA; USB 2.0 ports supply up to 500 mA; USB-C fast-charging delivers 3 000-5 000 mA. The milliampere is also the clinically important range for electric shock - ventricular fibrillation threshold is around 100 mA, and 1 mA is the threshold of perception. 1 mA = 10⁻³ A = 10³ µA.
Quick Reference Table
| Gigaamperes (GA) | Milliamperes (mA) |
|---|---|
| 1 GA | 1 × 1012 mA |
| 2 GA | 2 × 1012 mA |
| 5 GA | 5 × 1012 mA |
| 10 GA | 1 × 1013 mA |
| 25 GA | 2.5 × 1013 mA |
| 50 GA | 5 × 1013 mA |
| 100 GA | 1 × 1014 mA |