Convert Coulombs to Attocoulombs
Convert Coulombs (C) to Attocoulombs (aC) instantly and accurately.
Conversion Formula
aC = C × 1.000000000e+18
About Coulombs
The coulomb (C) is the SI derived unit of electric charge, equal to the charge transported by a current of 1 A in 1 s. In the 2019 SI revision it is fixed exactly via the elementary charge: 1 C = 1 / (1.602 176 634 × 10⁻¹⁹) e ≈ 6.241 × 10¹⁸ e. Practical benchmarks: a 1 Ah battery stores 3 600 C; a lightning bolt transfers 1-20 C.
About Attocoulombs
The attocoulomb (aC) equals 10⁻¹⁸ C, sitting between the elementary charge and the femtocoulomb. It arises in ultra-sensitive charge measurements: single-electron transistors, quantum capacitance probing of graphene and 2D materials, and scanning tunnelling microscopy where tip-sample charge exchange is tracked at this scale. 1 aC = 10⁻³ fC ≈ 6.24 e.
Quick Reference Table
| Coulombs (C) | Attocoulombs (aC) |
|---|---|
| 1 C | 1 × 1018 aC |
| 2 C | 2 × 1018 aC |
| 5 C | 5 × 1018 aC |
| 10 C | 1 × 1019 aC |
| 25 C | 2.5 × 1019 aC |
| 50 C | 5 × 1019 aC |
| 100 C | 1 × 1020 aC |