Enter the total number of amp-hours and the voltage into the calculator to determine the equivalent watt-hours. This calculator can also calculate either the voltage or amp-hours, given the other variables.
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| Calculator Operations | Required Inputs |
|---|---|
| Calculate Amp Hours from Watt Hours | Watt Hours, Voltage |
| Calculate Voltage from Watt Hours | Watt Hours, Amp Hours |
| Calculate Watt Hours from Amp Hours | Amp Hours, Voltage |
Amp Hour to Watt Hour Formula
The following formula is used to convert amp-hours to watt-hours.
Wh = Ah * V
- Where Wh is watt-hours
- Ah is amp-hours
- V is the voltage (volts)
To calculate Wh from Ah, multiply the amp-hours by the voltage.
Amp Hour to Watt Hour Definition
Amp-hours (Ah) are a unit of electric charge equal to current × time. Watt-hours (Wh) are a unit of energy equal to power × time. Converting amp-hours to watt-hours requires the voltage (typically assumed constant), using Wh = Ah × V.
Amp Hour to Watt Hour Example
The following is an example of how you can convert amp-hours into watt-hours using the formula above.
- First, determine the total amp-hours (Ah). Recall that amp-hours are current multiplied by time (A × h), not “amps per hour” (A/h). For this example, we will say that value is 50 Ah.
- Next, determine the voltage of the system. We will assume this to be 50 Volts.
- Finally, calculate the watt-hours using the formula above. 50 Ah × 50 V = 2,500 Wh.
FAQ
A watt-hour (Wh) is a unit of energy equal to one watt of power used for one hour (W × h). For reference, 1 Wh = 3,600 joules.
