Convert amperes to coulombs per second or C/s to amps, including milli, micro, nano, and kilo units, using the 1 A = 1 C/s relationship.
Common Mistakes Quick tips
- Entering values in both fields. Fill exactly one: either amperes or coulombs per second.
- Forgetting the identity 1 A = 1 C/s; once prefixes are aligned, the numeric values are the same.
- Mixing SI prefixes (milli vs micro vs nano). Example: 1 mA = 0.001 A; 1 µA = 0.000001 A.
- Confusing charge (coulomb), energy (joule), and power (watt). This tool converts current units only.
When to Use This Calculator
- Translating between amperes and coulombs per second in lab work, textbooks, or datasheets.
- Normalizing readings that use different SI prefixes (µA, mA, kA) to a common unit.
- Checking dimensional consistency for Q = I·t calculations (charge from current and time).
Input Definitions
- Amperes (A) — SI base unit of current. Prefixes: nA (10⁻⁹), µA (10⁻⁶), mA (10⁻³), kA (10³).
- Coulombs per second (C/s) — rate of charge flow; by definition 1 C/s = 1 A. Same prefixes as above.
- Conversions — convert prefixes to base units, then use A = C/s. Example: 750 mA = 0.75 A = 0.75 C/s.
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Ampere to Coulomb Per Second Formula
The following formulas convert amperes to coulombs per second and back; since they are defined to be equivalent, the numeric value is unchanged after adjusting SI prefixes.
How do you convert amperes to coulombs per second? Convert any prefixes to base units, then use the identity 1 A = 1 C/s; the numerical value is the same once units are aligned.
How do you convert coulombs per second to amperes? Convert prefixes to base C/s, then use C/s = A; the number remains unchanged after prefix handling.
Ampere to Coulomb Per Second Conversion Table
| Amperes (A) | Coulombs per second (C/s) |
|---|---|
| 0.000001 | 0.000001 |
| 0.000010 | 0.000010 |
| 0.000100 | 0.000100 |
| 0.001000 | 0.001000 |
| 0.002000 | 0.002000 |
| 0.005000 | 0.005000 |
| 0.010000 | 0.010000 |
| 0.020000 | 0.020000 |
| 0.050000 | 0.050000 |
| 0.100000 | 0.100000 |
| 0.200000 | 0.200000 |
| 0.500000 | 0.500000 |
| 1.000000 | 1.000000 |
| 2.000000 | 2.000000 |
| 5.000000 | 5.000000 |
| 10.000000 | 10.000000 |
| 25.000000 | 25.000000 |
| 50.000000 | 50.000000 |
| 100.000000 | 100.000000 |
| 1000.000000 | 1000.000000 |
| * SI definition: 1 ampere = 1 coulomb per second. | |
Example Problem
Convert 2.5 A to C/s.
Use the definition: 1 A = 1 C/s.
C/s = 2.5 × 1 = 2.5 C/s
