Watt-hours and amp-hours are both units for electric charge.
1 watt-hour is defined as 1 watt of power expended for 1 hour.
1 amp-hour is defined as 1 amp of current expended for 1 hour.
How do you convert watt-hours to amp-hours?
It is possible to convert watt-hours to amp-hours using the following formula:
Watt-hours = Amp-hours × Volts
To calculate amp-hours from watt-hours, we need to rearrange this equation to:
Amp-hours = Watt-hours / Volts
For the watt-hour to amp-hour conversion, you also need voltage (V).
Here is a nifty amp-hour calculator that converts watt-hours to amp-hours. Further on, you’ll also find a chart of Wh to Ah for 120V and 220V. You can also check the battery amps hours chart for 12V and 24V batteries here.
Wh To Ah Calculator
Watt-Hours To Amp-Hours Conversion Chart
|Watt-Hours (Wh)||Amp-Hours (at 120V):||Amp-Hours (at 220V):|
|1 Wh||0.008 Ah||0.005 Ah|
|10 Wh||0.08 Ah||0.05 Ah|
|20 Wh||0.17 Ah||0.09 Ah|
|30 Wh||0.25 Ah||0.14 Ah|
|40 Wh||0.33 Ah||0.18 Ah|
|50 Wh||0.42 Ah||0.23 Ah|
|100 Wh||0.83 Ah||0.45 Ah|
|200 Wh||1.67 Ah||0.91 Ah|
|500 Wh||4.17 Ah||2.27 Ah|
|1000 Wh||8.33 Ah||4.55 Ah|
You can also do the reverse conversion. To help you out, we have created a similar Ah to Wh converter here.
Note: Due to low battery capacity, it’s quite hard to produce battery-powered HVAC appliances such as air conditioners, furnaces, heaters, and so on. It might be interesting to read our articles about battery-operated heaters here and battery-powered air conditioners here.
Battery capacity also plays a key role in the mileage of electric vehicles. For example, if you check our article about how long it takes to fully charge a Tesla, you will see that all Tesla battery capacities are expressed in kWh and not in kAh or Ah.