Electrical Power Calculator
⚡ Electricity & magnetism. Use the Electrical power formula to find power, voltage, current: pick the value you want, type the others, and the answer updates as you go.
Power3 W
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Power | W |
| Voltage | V |
| Current | A |
Worked example
Find the power when Voltage = 6 V, Current = 0.5 A.
Using P = VI: Power = 3 W.
Frequently asked questions
What is the formula for Electrical power?
P = VI.
What do the letters stand for, and what units are used?
Power in W, Voltage in V, Current in A.
How do you calculate power?
Put the values into P = VI. For example, with Voltage = 6 V, Current = 0.5 A, power = 3 W.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (power, voltage, current) and fill in the others: it rearranges the formula for you.
