Convert Ampere-seconds (As) to Coulombs (C) instantly. Learn why 1 Ampere-second is equal to 1 Coulomb with our formula, conversion table, and technical guide.
As to Coulomb Converter
The Ampere-second to Coulomb Formula
Converting Ampere-seconds (As) to Coulombs (C) is a direct 1-to-1 conversion. The definition of an Ampere is one Coulomb per second, meaning:
Q(C) = Q(As) × 1
Essentially, an Ampere-second and a Coulomb are two names for the same physical quantity of electric charge.
Quick Reference Table (As to C)
Since the ratio is 1:1, the values remain identical. This table confirms common charge measurements:
| Ampere-seconds (As) | Coulombs (C) |
|---|---|
| 1 As | 1 C |
| 10 As | 10 C |
| 60 As (1 Am) | 60 C |
| 500 As | 500 C |
| 1,000 As | 1,000 C |
| 3,600 As (1 Ah) | 3,600 C |
Understanding the Relationship
What is an Ampere-second?
An Ampere-second (As) is a unit of electric charge representing the charge transferred by a steady current of one ampere flowing for exactly one second. It is the fundamental building block for larger units like Ampere-minutes and Ampere-hours.
What is a Coulomb?
The Coulomb (C) is the International System of Units (SI) unit of electric charge. It is named after Charles-Augustin de Coulomb. By modern definition, 1 Coulomb is the amount of charge that passes a point in a conductor in one second when the current is one Ampere.
Why is this conversion important?
While the terms are interchangeable, scientists often use “Coulombs” for electrostatic and laboratory calculations, whereas engineers might use “Ampere-seconds” when working with time-based electrical circuits. This tool helps verify that your data remains consistent across different technical documentation formats.