What you provide
What you provide
- Voltage expressed in V, using the same scenario as the other inputs
- Current expressed in A, using the same scenario as the other inputs
- Operating time expressed in h, using the same scenario as the other inputs
PHYSICS / ELECTRICAL CIRCUITS
Electrical Power and Energy Calculator
Calculate ideal DC or unity-power-factor electrical power and operating energy. Inspect the SI equation, substituted inputs, derived result, and physical limitations in one guided workspace.
- 01 Calculated in this tab
- 02 Values stay in this browser tab
- 03 Use boundary
Use boundary
Calculation path
Calculate ideal DC or unity-power-factor electrical power and operating energy. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.
Calculation path
P=VI
What you receive
What you receive
- Electrical power in W from the stated equation
- A symbolic formula plus substituted working with your values
- Visible assumptions, field guidance, and an authoritative learning reference
Use boundary
Choose the maximum decimal places shown. This does not increase source accuracy.
The relationship assumes DC or unity power factor and excludes conversion, wiring, and standby losses.
Use internally consistent units and retain extra precision when carrying the result into another calculation.
Reviewed reference factors