Electric Charge Converter
Convert between coulombs, ampere-hours, milliampere-hours, elementary charges, faradays and other units of electric charge.
1 coulomb = 0.2777777778 milliampere-hours
Most used charge units
- Coulomb C Base unit
- Milliampere-hour mAh 1 mAh = 3.6 C
- Ampere-hour Ah 1 Ah = 3,600 C
- Elementary charge e 1 e = 1.6021766 × 10-19 C
- Faraday F 1 F = 96,485.332 C
- Microcoulomb µC 1 µC = 0.000001 C
- Statcoulomb statC 1 statC = 3.335641 × 10-10 C
- Millicoulomb mC 1 mC = 0.001 C
- Nanocoulomb nC 1 nC = 1 × 10-9 C
- Abcoulomb abC 1 abC = 10 C
- Kiloampere-hour kAh 1 kAh = 3,600,000 C
- Picocoulomb pC 1 pC = 1 × 10-12 C
Popular charge conversions
- Milliampere-hours to coulombs 1 mAh = 3.6 C
- Coulombs to milliampere-hours 1 C = 0.2777778 mAh
- Ampere-hours to coulombs 1 Ah = 3,600 C
- Coulombs to ampere-hours 1 C = 0.0002777778 Ah
- Ampere-hours to milliampere-hours 1 Ah = 1,000 mAh
- Milliampere-hours to ampere-hours 1 mAh = 0.001 Ah
- Coulombs to elementary charges 1 C = 6.2415091 × 1018 e
- Faradays to coulombs 1 F = 96,485.33 C
What is charge?
Electric charge is the property of matter that makes it feel electric forces. It comes in whole multiples of the elementary charge carried by a proton (positive) or an electron (negative). The SI unit is the coulomb: the charge carried by a current of one ampere in one second, about 6.24 × 10¹⁸ elementary charges.
Battery capacity is usually stated as charge: a phone battery of 4,000 mAh can deliver 4,000 milliamperes for one hour. To know the energy stored you also need the voltage: 4,000 mAh at 3.85 V is about 15.4 Wh.
Charge units from smallest to largest
Every proportional charge unit on the site, ordered by size and expressed in coulombs.
- Elementary charge 1.602177 × 10-19 C
- Planck charge 1.875546 × 10-18 C
- Picocoulomb 1 × 10-12 C
- Statcoulomb 3.335641 × 10-10 C
- Nanocoulomb 1 × 10-9 C
- Microcoulomb 0.000001 C
- Millicoulomb 0.001 C
- Coulomb 1 C
- Ampere-second 1 C
- Milliampere-hour 3.6 C
- Abcoulomb 10 C
- Ampere-minute 60 C
- Kilocoulomb 1,000 C
- Ampere-hour 3,600 C
- Faraday 96,485.3 C
- Megacoulomb 1,000,000 C
- Kiloampere-hour 3,600,000 C
All 17 charge units
Common
- Ampere-hours
- Ampere-minutes
- Ampere-seconds
- Coulombs
- Elementary charges
- Faradays
- Kiloampere-hours
- Milliampere-hours
Metric prefixes
CGS & natural
Frequently asked questions
How many coulombs are in an ampere-hour?
Exactly 3,600 coulombs, the charge of one ampere flowing for 3,600 seconds.
How do I convert mAh to Wh?
Multiply by the battery voltage and divide by 1,000: 5,000 mAh × 3.7 V ÷ 1,000 = 18.5 Wh.
What is the charge of an electron?
−1.602176634 × 10⁻¹⁹ C exactly, since the 2019 redefinition of the SI.