DC Electric Power
Calculate electrical power and energy from voltage and current.
Your numbers
Physical power
Idealized SI-unit educational model. Real components, tolerances, losses and safe operating limits require separate verification.
Scenario comparison
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Formula
Use P = VI and E = Pt/1000. V is voltage in V, I is current in A, and t is operating hours. Power P is in W and consumed energy E is in kWh.
Calculate electrical power and energy from voltage and current.
Worked example
- Voltage (V)
- 12
- Current (A)
- 2
- Operating time (hours)
- 5
- Physical power
- 24 W
- Energy consumed
- 0.12 kWh
Scope and limitations
Idealized SI-unit educational model. Real components, tolerances, losses and safe operating limits require separate verification.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.
Formula version: 459e13d0daf1 · Example checked: