coulombs to ampere hours calculator
Convert electric charge from coulombs (C) to ampere-hours (Ah) or mAh instantly using Ah = C ÷ 3600. Includes reverse conversion and battery capacity examples.

battery charge conversion
Quickly convert coulombs to ampere-hours: Ah = 3600C-1 and mAh = 3.6C-1. Back with C = Ah 3600. These are the definitions obtained directly out of charge = current x time.
Formula & Table Summary:
Ah = C ÷ 3600
mAh = C ÷ 3.6
C = Ah × 3600
c to mah calculator
The Coulombs to Ampere Hours Calculator is used to convert electric charge between coulombs (C), and ampere-hours (Ah/mAh). As 1 A = 1 C/s one amp-hour is the amount of charge transmitted per second by 1 ampere: 1 Ah = 3600 C. C will therefore be obtained by Ah 3600, and vice versa. In milliampere-hours, mAh = C/3.6. The conversions are needed in a battery sizing, capacity calculation, state-of-charge, and laboratory measurements. When converting sensor charge points into usable battery supply or when comparing power-bank ratings to the ideal, accurate conversion of C to Ah values is an essential stage in the design process of any electronic component or IoT, or energy storage project.
electrical charge to ah
| Coulombs (C) | Ampere-hours (Ah) | Milliampere-hours (mAh) |
|---|---|---|
| 1 | 0.000278 | 0.278 |
| 3,600 | 1.000 | 1,000 |
| 5,400 | 1.500 | 1,500 |
| 7,200 | 2.000 | 2,000 |
| 18,000 | 5.000 | 5,000 |
Frequently Asked Questions - coulombs to ampere hours calculator:
How do I convert coulombs to ampere-hours?
Use Ah = C ÷ 3600 and mAh = C ÷ 3.6.
How do I convert ampere-hours to coulombs?
Use C = Ah × 3600.
Why is 3600 used in the formula?
Because 1 hour = 3600 seconds and 1 A = 1 C/s.
What does 1 Ah represent?
The charge delivered by 1 ampere flowing for 1 hour, equal to 3600 coulombs.
When should I use mAh instead of Ah?
Use mAh for small batteries (phones, wearables) where capacities are fractional Ah.
Is the conversion affected by battery voltage?
No. Ah and C are charge units independent of voltage.
Does temperature change the conversion?
No. The unit conversion is fixed; temperature affects usable capacity, not the math.
Can I estimate remaining battery life from coulombs?
Yes, coulomb counting integrates current over time to estimate state of charge.
Is 1 mAh equal to 3.6 C?
Yes. 1 mAh × 3.6 = 3.6 C.
Are Ah and Wh the same?
No. Wh = Ah × Voltage; Ah is charge, Wh is energy.
Related Posts

Wh To KW Calculator
Easily convert watt-hours to kilowatts using this free Wh to kW calculator. Enter energy (Wh) and time (hours) to get kW. Ideal for electrical and energy calculations.

kVA to Watts Calculator
Convert kVA to Watts easily with this free calculator. Enter kVA and power factor (PF) to get watts (W). Ideal for electrical load and power system calculations.

generator voltage calculator
Calculate induced EMF and terminal voltage for AC generators from flux, turns, and frequency. Includes per-phase RMS formula and simple internal drop model.

capacitor charge current calculator
Calculate the charging current of a capacitor in RC circuits using voltage, resistance, and capacitance for accurate transient analysis.

Water Wheel Power Calculator
Calculate the power generated by a water wheel using flow rate, head, and efficiency. Ideal for engineers, students, and small-scale hydro projects.

VA to kW Calculator
Use our free VA to kW calculator to convert volt-amps to kilowatts (kW) accurately. Supports single and three-phase power systems with formula & examples.
