Electrical Power calculator

Volt picoV nanoV microV milliV V kiloV megaV gigaV

Ampere picoamp nanoamp microamp milliamp A

Duration seconds minutes hours days weeks months years

Calculate!

Calculate power (Watt)

Potential ?	12 V (Volt)
Current ?	2.08 A (Ampere)	A = C/s
Resistance ?	5.76 Ω (Ohm)	Ω = V / A
Active power ?	25 W (Watt)	rate of energy transfer / W = V * A

Calculate energy (KWh/Joule)

After 4 days of continuous power usage:

Charge (Ah)	200 Ah
Energy (kWh)	2.4 KWh
Energy (Joule)	8.64 GJ
Energy (Calorie)	2.06 Gcal

Calculate capacity (mAh/Wh)

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

Battery type	Watt-hour	empty after
Small powerpack - 2000mAh @ 5V:	10 Wh	24 minutes
Large powerpack - 10000mAh @ 5V:	50 Wh	2 hours
Huge powerpack - 15000mAh @ 5V:	75 Wh	3 hours
Car Battery lead acid 12V - 50Ah @ 12V:	600 Wh	24 hours
Solar Battery lead acid 12V - 200Ah @ 12V:	2400 Wh	4 days

References

AC Power

Difference Between Watts And Volt-Amperes