Electrical Power Calculation
Calculate electrical power from voltage and current.
V
A
Result
1.100 W
Power: 1,100 watts
Result in all units
Step-by-step solution
P = V × I
What Is Electrical Power?
Electrical power is the energy consumed or produced per unit time in a circuit, measured in watts (W). It is decisive when choosing device consumption, fuses and cabling.
How is it calculated?
How Is It Calculated?
P = V × I (also P = I²R = V²/R)
- Enter the voltage and the current.
- For example, 220 V and 5 A: 220 × 5 = 1100 W.
Frequently Asked Questions
What is the difference between watts and VA?
Watts express real (active) power, while VA expresses apparent power; the power factor defines the relationship between them.