Watt-Hour Calculator
Get the accurate watt-hour(Wh) value in multiple units.
Watt-Hour Calculator
Watt-Hours From amp-Hours
Watt-Hours From Time
Unit Inter-Converter
What Is Watt-Hour Calculator?
Watt-Hour Calculator is used to find the value of energy in Watt-hours. Watt-Hour Calculator tool allows you to to calculate the energy in watt-hours given the electric charge in ampere-hours (Ah) and the potential difference in volts (V).
It also helps to to calculate the energy in watt-hours given the power in watts (W) and the time in hours (h).Â
How To Use?
- Choose a required unit
- Input values
- Answers will be calculated automatically
- Just change the value and answer will be changed automatically
- Also, you can inter-convert the unit of power among BTU, Watt, and Horsepower(hp)
Formulas
The formulas used in the calculator are derived from the definitions of the units of electricity:
Watt-hours from amp-hours: The energy E (in watt-hours) is equal to the electric charge Q (in ampere-hours) times the potential difference V (in volts), divided by 1 hour (to convert to watt-hours):
                                        E= Q x V/1 Hour
Watt-hours from time: The energy E (in watt-hours) is equal to the power P (in watts) times the time t (in hours):
                                        E=P×t
Conversions
- Voltage: 1 V = 1e-9 nV = 1e-6 µV = 1e-3 mV = 1e3 kV = 1e6 MV
- Charge: 1 C = 3600 Ah = 3.6 mAh
- Power: 1 W = 1e-3 mW = 1e3 kW = 1e6 MW = 0.29307107 BTU/h = 745.7 Hp (I) = 746 Hp (E)
- Time: 1 s = 1e-3 ms = 60 min = 3600 h = 86400 day = 604800 week = 2.628e+6 month = 3.154e+7 year = 0.0166667 hr/min = 0.000277778 days/hr