Example 1
A device operating at 12 V and 2 A uses 24 W.
Mendeleev
Physics tools
All toolsElements
EnglishEN⌄
Languages
EnglishENFrançaisFRDeutschDEEspañolESItalianoITPortuguêsPTNederlandsNLPolskiPLSvenskaSVČeštinaCSDanskDANorskNOSuomiFITürkçeTRРусскийRUУкраїнськаUK中文ZH日本語JAБългарскиBGCatalàCAΕλληνικάELEestiETHrvatskiHRMagyarHULëtzebuergeschLBLietuviųLTLatviešuLVRomânăROSlovenčinaSKSlovenščinaSLСрпскиSR한국어KOTiếng ViệtVIBahasa IndonesiaIDBahasa MelayuMSالعربيةARहिन्दीHIไทยTHעבריתHEÍslenskaIS
Physics tools › Electric power calculator
Mendeleev · Physics
Electric power calculator
In direct current, electric power is the product of voltage and current. In alternating-current systems, phase and power factor may also matter.
Formula usedP = VI
Calculate
Electric power calculator
What do the symbols mean?
Ppower
Vvoltage
Icurrent
Two worked examples
Example 2
A 2.3 kW appliance on 230 V draws about 10 A in the simple P = VI model.
Good to knowEnglish texts commonly write voltage as V, giving P = VI or P = IV.