Convert Electric Charge Units

Calculator for coulomb, ampere hours, milliampere hours, franklin (statcoulomb) and biot seconds. These are units for the electric charge, which are used for power storage, like accus and batteries. The SI-unit is coulomb, for accus usually milliampere hours is used. Franklin and biot seconds are rarely seen. Capacity refers to the usable amount of charge; this has the same units.

Please enter one value, the other values will be calculated.

1 C = 1/3600 Ah = 1/3,6 mAh = 2997924580 Fr = 1/10 Bis

Electric charge is a fundamental physical quantity that indicates how much electricity is stored in a body or system. This is not the same as electrical energy, which is measured in watt-hours and similar units. Electric charge describes how strongly the charge carriers, electrons or ions, participate in the electromagnetic interaction. It is a measure of the amount of stored electricity, this is the number of charge carriers. Energy, on the other hand, is the ability to do work in an electric field. It results from the product of charge and electrical voltage. Voltage indicates how much energy is transferred per unit of charge. Together with current, it determines how much power is provided. Practically, this means how quickly the battery can perform the task required by the device.

The actual usable charge depends on other factors such as temperature, battery age, and discharge current. Like so many things in life, rechargable batteries don't improve with time and use. When capacity decreases, this is called degradation. Eventually, a battery degrades to such an extent that it should be replaced and recycled. Rechargable batteries contain important raw materials, often lithium, which can be reused.

coulomb, ampere second (C, As):
ampere hour (Ah):
milliampere hour (mAh):
franklin, statcoulomb (Fr, statC):
biot second (Bis):