This page converts coulombs into microcoulombs using the factor 1,000,000, 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.
The coulomb is the SI unit of electric charge: one ampere flowing for one second. One micro coulomb is one millionth of a coulomb (1e-6 coulombs).
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 microcoulombs, so you can sanity-check whether your answer is a plausible size.
The formula
coulombs- The amount you are converting, in coulombs
1,000,000- The exact number of microcoulombs in one coulomb
microcoulombs- The converted result
How it works, step by step
- Enter the value in coulombs.
- It is multiplied by 1,000,000, the exact factor between the two units.
- The answer is shown in microcoulombs, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
Camera flash capacitor: 0.05 C in microcoulombs
Take camera flash capacitor, roughly 0.05 C. The conversion is a single multiplication — 0.05 × 1e+06 — giving 50,000 µC. Because the relationship is proportional, doubling the input doubles the answer to 100,000 µC.
Lightning strike: 15 C in microcoulombs
Take lightning strike, roughly 15 C. The conversion is a single multiplication — 15 × 1e+06 — giving 1.5e+07 µC. Because the relationship is proportional, doubling the input doubles the answer to 3e+07 µC.
How to read your score
Frequently asked questions
How many microcoulombs are in one coulomb?
Exactly 1,000,000. 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 coulombs to microcoulombs?
microcoulombs = coulombs × 1,000,000. Reversed, coulombs = microcoulombs ÷ 1,000,000, which is the same as multiplying by 1e-06.
Which is the bigger unit, the coulomb or the microcoulomb?
The coulomb. One coulomb equals 1e+06 microcoulombs.
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 coulomb?
The coulomb is the SI unit of electric charge: one ampere flowing for one second.
What is a microcoulomb?
One micro coulomb is one millionth of a coulomb (1e-6 coulombs).
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.
Coulombs to microcoulombs reference tables
| Coulombs | Microcoulombs |
|---|---|
| 0.5 C | 500,000 µC |
| 1 C | 1e+06 µC |
| 2 C | 2e+06 µC |
| 3 C | 3e+06 µC |
| 5 C | 5e+06 µC |
| 10 C | 1e+07 µC |
| 20 C | 2e+07 µC |
| 25 C | 2.5e+07 µC |
| 50 C | 5e+07 µC |
| 75 C | 7.5e+07 µC |
| 100 C | 1e+08 µC |
| 250 C | 2.5e+08 µC |
| 500 C | 5e+08 µC |
| 1000 C | 1e+09 µC |
| 5000 C | 5e+09 µC |
Exact factor: 1 coulomb = 1,000,000 microcoulombs.
| Quantity | C | µC |
|---|---|---|
| AA alkaline cell | 9000 C | 9e+09 µC |
| Phone battery, 4000 mAh | 1.44e+04 C | 1.44e+10 µC |
| Laptop battery, 60 Wh at 11.1 V | 1.946e+04 C | 1.946e+10 µC |
| Car battery, 60 Ah | 2.16e+05 C | 2.16e+11 µC |
| Camera flash capacitor | 0.05 C | 5e+04 µC |
| Lightning strike | 15 C | 1.5e+07 µC |
Published reference values, converted with the same factor this page uses.