Electrical Power calculator

Calculate power (Watt)

  • Potential: 5 V (Volt)
  • Current: 5 A (Ampere)
  • Active power: 25 W (Watt)
  • Calculate energy (KWh/Joule)

  • After 1 hours of continuous power usage:
  • Charge: 5000 mAh
  • kWh: 25 Wh
  • Joule: 90 MJ
  • Calorie: 21.5 Mcal
  • Calculate capacity (mAh/Wh)

    Compare capacity with [AA batteries] [Powerpack] [Phone]

    Battery typeWatt-hourempty after
    Iphone 5 - 1440mAh @ 3.8V:5.472 Wh13.1 minutes
    Iphone 5s - 1570mAh @ 3.8V:5.966 Wh14.3 minutes
    Iphone 6/7 - 1880mAh @ 3.8V:7.144 Wh17.1 minutes
    Iphone 6s/7s - 2915mAh @ 3.8V:11.077 Wh26.6 minutes
    Samsung Galaxy S8 - 3500mAh @ 3.85V:13.475 Wh32.3 minutes