Electrical engineering fundamentals · Electrical basics
DC electrical power from voltage and current
Calculate ideal DC power from voltage across a device and current through it.
Method and scope
P = VI.
Use dc electrical power from voltage and current for educational calculation or a clearly scoped arithmetic estimate. Intended for Learners, General educational use.
Inputs- Voltage — V, mV, kV
- Current — A, mA
SOURCE AND LIMITS
Assumptions: Voltage and current are simultaneous DC values using a passive sign convention. The result is power magnitude.
Limitations: For AC circuits, use appropriate real/apparent power and waveform analysis.
Method version 1.0.0 · Unit registry and result provenance are shown after calculation. This tool is limited to the documented scope.Explore related fields
See the other currently released formula calculators tagged for these research fields.