This page converts kilocoulombs into coulombs using the factor 1000, and shows the reverse figure alongside it. Both units measure the total quantity of electricity, including battery capacity, which is why one number does the whole job.
One kilo coulomb is a thousand of a coulomb (1e3 coulombs). The coulomb is the SI unit of electric charge: one ampere flowing for one second.
Milliamp-hours are charge, not energy. Two batteries both rated 3,000 mAh store different amounts of energy if their voltages differ, which is why power banks advertise mAh at cell voltage and deliver less at USB voltage. The tables underneath give both a plain step-by-step lookup and a list of real quantities expressed in coulombs, so you can sanity-check whether your answer is a plausible size.
The formula
kilocoulombs- The amount you are converting, in kilocoulombs
1000- The exact number of coulombs in one kilocoulomb
coulombs- The converted result
How it works, step by step
- Enter the value in kilocoulombs.
- It is multiplied by 1000, the exact factor between the two units.
- The answer is shown in coulombs, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
Laptop battery, 60 Wh at 11.1 V: 19.5 kC in coulombs
Take laptop battery, 60 wh at 11.1 v, roughly 19.5 kC. The conversion is a single multiplication — 19.5 × 1000 — giving 19,500 C. Because the relationship is proportional, doubling the input doubles the answer to 39,000 C.
Phone battery, 4000 mAh: 14.4 kC in coulombs
Take phone battery, 4000 mah, roughly 14.4 kC. The conversion is a single multiplication — 14.4 × 1000 — giving 14,400 C. Because the relationship is proportional, doubling the input doubles the answer to 28,800 C.
How to read your score
Frequently asked questions
How many coulombs are in one kilocoulomb?
Exactly 1000. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert kilocoulombs to coulombs?
coulombs = kilocoulombs × 1000. Reversed, kilocoulombs = coulombs ÷ 1000, which is the same as multiplying by 0.001.
Which is the bigger unit, the kilocoulomb or the coulomb?
The kilocoulomb. One kilocoulomb equals 1000 coulombs.
What does this quantity actually measure?
Both units measure the total quantity of electricity, including battery capacity. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a kilocoulomb?
One kilo coulomb is a thousand of a coulomb (1e3 coulombs).
What is a coulomb?
The coulomb is the SI unit of electric charge: one ampere flowing for one second.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Kilocoulombs to coulombs reference tables
| Kilocoulombs | Coulombs |
|---|---|
| 0.5 kC | 500 C |
| 1 kC | 1000 C |
| 2 kC | 2000 C |
| 3 kC | 3000 C |
| 5 kC | 5000 C |
| 10 kC | 10,000 C |
| 20 kC | 20,000 C |
| 25 kC | 25,000 C |
| 50 kC | 50,000 C |
| 75 kC | 75,000 C |
| 100 kC | 100,000 C |
| 250 kC | 250,000 C |
| 500 kC | 500,000 C |
| 1000 kC | 1e+06 C |
| 5000 kC | 5e+06 C |
Exact factor: 1 kilocoulomb = 1000 coulombs.
| Quantity | kC | C |
|---|---|---|
| AA alkaline cell | 9 kC | 9000 C |
| Phone battery, 4000 mAh | 14.4 kC | 1.44e+04 C |
| Laptop battery, 60 Wh at 11.1 V | 19.46 kC | 1.946e+04 C |
| Car battery, 60 Ah | 216 kC | 2.16e+05 C |
| Camera flash capacitor | 5e-05 kC | 0.05 C |
| Lightning strike | 0.015 kC | 15 C |
Published reference values, converted with the same factor this page uses.