Enter the total cost and the total watts into the calculator to determine the price per watt. This calculator helps in evaluating the cost efficiency of electrical devices or solar panel installations.

Price Per Watt Formula

The following formula is used to calculate the price per watt.

PPW = TC / TW

Variables:

  • PPW is the price per watt ($/W)
  • TC is the total cost ($)
  • TW is the total watts (W)

To calculate the price per watt, divide the total cost by the total watts.

What is Price Per Watt?

Price per watt is a measure of the cost efficiency of an electrical device or a solar panel installation. It represents the cost for each watt of power that the device or system can produce or consume. This metric is particularly useful when comparing the cost-effectiveness of different products or energy solutions, as it allows for a direct comparison regardless of their size or power output.

How to Calculate Price Per Watt?

The following steps outline how to calculate the Price Per Watt.


  1. First, determine the total cost (TC) of the device or system in dollars.
  2. Next, determine the total watts (TW) that the device or system can produce or consume.
  3. Next, gather the formula from above = PPW = TC / TW.
  4. Finally, calculate the Price Per Watt (PPW) in dollars per watt.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Total cost (TC) = $1500

Total watts (TW) = 3000 W