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.
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.