Calculate amp hours, voltage, or watt hours from any two values, with unit conversions for Ah, mAh, kAh, V, mV, kV, Wh, and kWh in batteries.
Customize This Calculator
Build your own version. Describe what you want changed, added, or compared.
- All Unit Converters
- Electricity, Magnetism, & Electronics Unit Converters
- Amps to Watts Calculator
- Watts to Amps Calculator
- HP to Amps Calculator
| 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.
- 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.
