Electrical Charge Calculator Formula
Understand the math behind the electrical charge calculator. Each variable explained with a worked example.
Formulas Used
Charge
charge = current * timeCharge (mAh)
charge_mah = current * time / 3.6Variables
| Variable | Description | Default |
|---|---|---|
current | Current(A) | 5 |
time | Time(s) | 60 |
How It Works
Electrical Charge
Electric charge is the fundamental quantity that defines the amount of electricity transferred.
Formula
Q = I * t
where I is the current in amperes and t is the time in seconds. One coulomb equals one ampere flowing for one second.
Worked Example
A circuit carrying 5 A for 60 seconds.
current = 5time = 60
- 01Q = I * t
- 02Q = 5 * 60
- 03Q = 300 C
- 04In mAh: 300 / 3.6 = 83.33 mAh
Frequently Asked Questions
What is the charge of one electron?
The elementary charge is approximately 1.602 x 10^-19 coulombs. One coulomb equals about 6.24 x 10^18 electrons.
What is the difference between coulombs and ampere-hours?
1 Ah = 3600 C. Ampere-hours are commonly used to rate battery capacity.
Is charge conserved?
Yes. Electric charge is conserved in all physical processes. Charge cannot be created or destroyed, only transferred.
Ready to run the numbers?
Open Electrical Charge Calculator