To convert milliamp-hours to microcoulombs, multiply by 3,600,000. That factor is the whole relationship: both units measure the total quantity of electricity, including battery capacity, so the conversion is a proportion with no offset and no substance-specific constant.
The milliamp-hour is how every phone, laptop and power-bank battery is rated. One mAh is 3.6 coulombs, because an hour is 3,600 seconds. 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. Two tables follow: rounded steps for quick lookup, and a set of real reference quantities converted into microcoulombs, which is usually more useful than the bare number.
The formula
milliamp-hours- The amount you are converting, in milliamp-hours
3,600,000- The exact number of microcoulombs in one milliamp-hour
microcoulombs- The converted result
How it works, step by step
- Enter the value in milliamp-hours.
- It is multiplied by 3,600,000, 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
AA alkaline cell: 2500 mAh in microcoulombs
Take aa alkaline cell, roughly 2500 mAh. The conversion is a single multiplication — 2500 × 3.6e+06 — giving 9e+09 µC. Because the relationship is proportional, doubling the input doubles the answer to 1.8e+10 µC.
Car battery, 60 Ah: 6e+04 mAh in microcoulombs
Car battery, 60 Ah comes to about 6e+04 mAh. Multiplying by the factor: 6e+04 × 3.6e+06 = 2.16e+11 µC. Dividing the answer back by 3.6e+06 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
How to read your score
Frequently asked questions
How many microcoulombs are in one milliamp-hour?
Exactly 3,600,000. 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 milliamp-hours to microcoulombs?
microcoulombs = milliamp-hours × 3,600,000. Reversed, milliamp-hours = microcoulombs ÷ 3,600,000, which is the same as multiplying by 2.77777777778e-07.
Which is the bigger unit, the milliamp-hour or the microcoulomb?
The milliamp-hour. One milliamp-hour equals 3.6e+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 milliamp-hour?
The milliamp-hour is how every phone, laptop and power-bank battery is rated. One mAh is 3.6 coulombs, because an hour is 3,600 seconds.
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.
Milliamp-Hours to microcoulombs reference tables
| Milliamp-Hours | Microcoulombs |
|---|---|
| 0.5 mAh | 1.8e+06 µC |
| 1 mAh | 3.6e+06 µC |
| 2 mAh | 7.2e+06 µC |
| 3 mAh | 1.08e+07 µC |
| 5 mAh | 1.8e+07 µC |
| 10 mAh | 3.6e+07 µC |
| 20 mAh | 7.2e+07 µC |
| 25 mAh | 9e+07 µC |
| 50 mAh | 1.8e+08 µC |
| 75 mAh | 2.7e+08 µC |
| 100 mAh | 3.6e+08 µC |
| 250 mAh | 9e+08 µC |
| 500 mAh | 1.8e+09 µC |
| 1000 mAh | 3.6e+09 µC |
| 5000 mAh | 1.8e+10 µC |
Exact factor: 1 milliamp-hour = 3,600,000 microcoulombs.
| Quantity | mAh | µC |
|---|---|---|
| AA alkaline cell | 2500 mAh | 9e+09 µC |
| Phone battery, 4000 mAh | 4000 mAh | 1.44e+10 µC |
| Laptop battery, 60 Wh at 11.1 V | 5405 mAh | 1.946e+10 µC |
| Car battery, 60 Ah | 6e+04 mAh | 2.16e+11 µC |
| Camera flash capacitor | 0.01389 mAh | 5e+04 µC |
| Lightning strike | 4.167 mAh | 1.5e+07 µC |
Published reference values, converted with the same factor this page uses.