Convert Amperes to Picoamperes
Convert Amperes (A) to Picoamperes (pA) instantly and accurately.
Conversion Formula
pA = A × 1000000000000
About Amperes
The ampere (A) is the SI base unit of electric current, defined since 2019 by fixing the elementary charge e = 1.602 176 634 × 10⁻¹⁹ C. One ampere corresponds to approximately 6.241 × 10¹⁸ electrons passing a cross-section per second. Common benchmarks: a 60 W incandescent lamp draws 0.5 A at 120 V; household circuit breakers protect at 10-30 A; a car starter motor draws 100-200 A on cranking.
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
| Amperes (A) | Picoamperes (pA) |
|---|---|
| 1 A | 1 × 1012 pA |
| 2 A | 2 × 1012 pA |
| 5 A | 5 × 1012 pA |
| 10 A | 1 × 1013 pA |
| 25 A | 2.5 × 1013 pA |
| 50 A | 5 × 1013 pA |
| 100 A | 1 × 1014 pA |