Laser Power Density Calculator


Calculating laser power density is crucial in various scientific and industrial applications. Whether you’re involved in laser cutting, welding, or medical procedures, understanding and calculating power density accurately is essential. To simplify this process, we’ve developed a handy calculator.

How to Use

Simply input the values for laser power (P) in watts and spot area (A) in square meters into the respective fields below. Then, click the “Calculate” button to obtain the power density (D) in watts per square meter.


The formula used to calculate laser power density is:


  • D = Power density (W/m²)
  • P = Laser power (W)
  • A = Spot area (m²)

Example Solve

Let’s say you have a laser with a power output of 1000 watts and a spot area of 0.01 square meters. Using the formula above:

So, the power density in this example is 100,000 watts per square meter.


Q: Can I use this calculator for different units of measurement?
A: No, this calculator specifically requires input in watts for power and square meters for area.

Q: Is the formula used here accurate for all types of lasers?
A: Yes, the formula applies universally for calculating power density regardless of the type of laser.

Q: What are the typical applications of laser power density calculations?
A: Laser power density calculations are commonly used in laser cutting, welding, engraving, medical procedures, and materials processing.


Calculating laser power density is a fundamental aspect of laser technology. With our simple HTML and JavaScript calculator, you can quickly and accurately determine power density for various applications. Whether you’re an engineer, scientist, or hobbyist, this tool can streamline your calculations effectively.

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