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Physical Intensity Calculator

Calculate the intensity from power and area, with different units. In physics, intensity is power per area, the formula is I=P/A. The unit of intensity calculates as watts per square meter, W/m². Intensity commonly is used for radiant energy.

Power P:
Area A:
Intensity I:

Example: a quadratic LED light with an edge length of 17 centimeters has an area of 289 square centimeters (cm²). It has a power of 18 watts. So its intensity is almost 623 watts per square meter.


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