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Local calculation
Entered values never leave your device.
Entered values never leave your device.
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How the calculation works
Calculate power from voltage and current, plus energy for a given operating time. The tool converts the form units and presents the result using readable engineering notation.
P = V × I; E = P × t
Example
A 12 V device drawing 2 A uses 24 W.
How to interpret the result
- In DC circuits, voltage multiplied by current gives real power.
- Energy depends on time, so pulses and continuous operation have different thermal effects.
- AC reactive loads require RMS values and power-factor analysis.
Limitations and safe use
The result uses a simplified model. Check tolerance, temperature, absolute ratings and the component datasheet.
FAQ
Is the result saved?
The latest result may be stored locally in this browser, but it is not sent to LutujTo.
Can I use the result in a project?
Yes, but select a real component with margin and confirm its ratings in the datasheet.