One amp-hour is exactly 3,600,000,000 microcoulombs, so converting amp-hours to microcoulombs is a single multiplication. Enter any figure and the result appears as you type — the arithmetic runs in your browser, so nothing is sent anywhere.
One micro coulomb is one millionth of a coulomb (1e-6 coulombs). Amp-hours rate car, leisure and solar batteries. A 100 Ah battery can in principle deliver one amp for a hundred hours.
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
amp-hours- The amount you are converting, in amp-hours
3,600,000,000- The exact number of microcoulombs in one amp-hour
microcoulombs- The converted result
How it works, step by step
- Enter the value in amp-hours.
- It is multiplied by 3,600,000,000, 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
AA alkaline cell: 2.5 Ah in microcoulombs
Take aa alkaline cell, roughly 2.5 Ah. The conversion is a single multiplication — 2.5 × 3.6e+09 — giving 9e+09 µC. Because the relationship is proportional, doubling the input doubles the answer to 1.8e+10 µC.
Car battery, 60 Ah: 60 Ah in microcoulombs
At 60 Ah (car battery, 60 ah), the same quantity in microcoulombs is 60 × 3.6e+09 = 2.16e+11 µC. One amp-hour is 3.6e+09 microcoulombs, so the numbers grow as expected.
How to read your score
Frequently asked questions
How many microcoulombs are in one amp-hour?
Exactly 3,600,000,000. 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 amp-hours to microcoulombs?
microcoulombs = amp-hours × 3,600,000,000. Reversed, amp-hours = microcoulombs ÷ 3,600,000,000, which is the same as multiplying by 2.77777777778e-10.
Which is the bigger unit, the amp-hour or the microcoulomb?
The amp-hour. One amp-hour equals 3.6e+09 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 amp-hour?
Amp-hours rate car, leisure and solar batteries. A 100 Ah battery can in principle deliver one amp for a hundred hours.
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.
Amp-Hours to microcoulombs reference tables
| Amp-Hours | Microcoulombs |
|---|---|
| 0.5 Ah | 1.8e+09 µC |
| 1 Ah | 3.6e+09 µC |
| 2 Ah | 7.2e+09 µC |
| 3 Ah | 1.08e+10 µC |
| 5 Ah | 1.8e+10 µC |
| 10 Ah | 3.6e+10 µC |
| 20 Ah | 7.2e+10 µC |
| 25 Ah | 9e+10 µC |
| 50 Ah | 1.8e+11 µC |
| 75 Ah | 2.7e+11 µC |
| 100 Ah | 3.6e+11 µC |
| 250 Ah | 9e+11 µC |
| 500 Ah | 1.8e+12 µC |
| 1000 Ah | 3.6e+12 µC |
| 5000 Ah | 1.8e+13 µC |
Exact factor: 1 amp-hour = 3,600,000,000 microcoulombs.
| Quantity | Ah | µC |
|---|---|---|
| AA alkaline cell | 2.5 Ah | 9e+09 µC |
| Phone battery, 4000 mAh | 4 Ah | 1.44e+10 µC |
| Laptop battery, 60 Wh at 11.1 V | 5.405 Ah | 1.946e+10 µC |
| Car battery, 60 Ah | 60 Ah | 2.16e+11 µC |
| Camera flash capacitor | 1.389e-05 Ah | 5e+04 µC |
| Lightning strike | 0.004167 Ah | 1.5e+07 µC |
Published reference values, converted with the same factor this page uses.