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Convert amperes to coulombs per second (1 A = 1 C/s), C/s back to amps, or amp-hours to coulombs, with milli, micro, nano and kilo prefixes.
Common Mistakes Quick tips
- Choose what to solve for, then enter the one displayed input with its correct prefix.
- 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 ยตA = 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 (ยตA, mA, kA) to a common unit.
- Checking dimensional consistency for Q = Iยทt calculations (charge from current and time).
Input Definitions
- Amperes (A) โ SI base unit of current. Prefixes: nA (10โปโน), ยตA (10โปโถ), mA (10โปยณ), kA (10ยณ).
- Coulombs per second (C/s) โ rate of charge flow; by definition 1 C/s = 1 A. Same prefixes as above.
- Conversions โ convert prefixes to base units, then use A = C/s. Example: 750 mA = 0.75 A = 0.75 C/s.
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.
Definition: 1~A = 1~C / s I = (ฮ Q) / (ฮ t)
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 ร 1 = 2.5 C/s
