Wh to mAh calculation  Online Electrical Calculators
Watthours (wh) to milliamphours (mAh) Calculator.
Enter the Energy (E) in Watthours (wh) and Voltage in volts (V) and press the Calculator button to get the Battery Capacity (Q) in milliamphours (mAh):
Advertisements
Note, For higher values like 5×10^{3}, 10×10^{6}, 1.6 x10^{12}, enter the value like this for scientific notation as 5e3, 10e6, 1.6e12, etc.
Conversion Using the Power Formula :
DC Line wh to mAh Calculation:
The Battery Capacity (Q) in milliamphours (mAh) is equal to 1000 times the energy (E) in watthours (Wh) divided by the voltage in volts (V):
mAh = (150 x 1000) / 12
mAh = 12500
Where:

 E = Energy in watthours (wh)
 Q = Battery Capacity in milliamphours (mAh)
 V =Voltage in volts
Advertisements
How to use This Calculator?
To use the above “Wh to mAh Conversion Calculator” follow the below steps:
01. Enter wattshours: Input the Energy in Wattshours value in the specified input box. You can enter the value in wattshours or Kilowatthours by choosing the appropriate option from the dropdown.
02. Enter Supply Voltage: Input the supply voltage or motor voltage value in the specified input box. You can enter the value in Volts or Kilovolts by choosing the appropriate option from the dropdown.
03. Reset: If you want to “reset” the calculator to perform another conversion, you can click the “Reset” button, and all input fields will be cleared.
04. Calculate: Click the “Calculate” button to obtain the results. The calculated results will be displayed in the “Results:” section.
05. Swap: If you want to “Swap” the calculated to Exchange conversion, you can click the “Swap” button, and Calculate will be Exchange.
06. Result: The calculated “result” will be displayed in the respective “Result In mAh” output field.
wh to mAh Conversion table:
Watt Hours (Wh)  Voltage (V)  Milliamp Hours (mAh) 

1Wh  12V  83.33 mAh 
5Wh  12V  416.66 mAh 
10Wh  12V  833.33 mAh 
15Wh  12V  1250 mAh 
20Wh  12V  1666.66 mAh 
25Wh  12V  2083.33 mAh 
30Wh  12V  2500 mAh 
35Wh  12V  2916.66 mAh 
40Wh  12V  3333.33 mAh 
45Wh  12V  3750 mAh 
50Wh  12V  4166.66 mAh 
55Wh  12V  4583.33 mAh 
60Wh  12V  5000 mAh 
65Wh  12V  5416.66 mAh 
70Wh  12V  5833.33 mAh 
75Wh  12V  6250 mAh 
80Wh  12V  6666.66 mAh 
85Wh  12V  7083.33 mAh 
90Wh  12V  7500 mAh 
100Wh  12V  8333.33 mAh 
using 12v battery as power supply 
Frequently asked questions
A measure of the capacity of the battery is in Watthours (Wh). Wh is calculated by multiplying the number of Amps with the battery voltage.
A Watt Hours (Wh) represents a unit of electrical energy that describes the total amount of Real power consumed over a specific duration. Essentially, it’s a measure of how much energy a device uses when it runs for an hour.
A watt hours (Wh) and milliamperehours (mAh) can give a comprehensive view of a battery’s capacity. Converting Wh to mAh or vice versa is often necessary for comparison, especially when purchasing or replacing batteries.
Watthours (Wh) is a unit of energy measurement. It represents the amount of energy consumed or produced over a period of 2 hours at a constant rate of one watt. This unit is commonly used to measure the energy consumption of electrical devices or systems. It is calculated by multiplying the power (p) in watts (w) by the time (t) in hours during which the power is consumed or produced.
The AmpereHour Capacity is the amount of electricity that a battery will deliver during 20 hours before the voltage falls to 10.50V. For example, a 10Ah battery will deliver a current of 5A for 20 hours. Recommended Charge Rate (Amps).