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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:		milliwatts, mWwatts, Wkilowatts, kWmegawatts, MWgigawatts, GW
Area A:		cm²m²are,ahectare, hakm²square inches, in²square feet, ft²square yards, yd²acres, ac
Intensity I:		mW/m²W/m²kW/m²MW/m²

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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