Enter the total weight (g) and the total power (watts) into the Calculator. The calculator will evaluate the Grams Per watt. 

Grams Per Watt Formula

GPW = W / P


  • GPW is the Grams Per Watt (g/watt)
  • W is the total weight (g)
  • P is the total power (watts)

To calculate Grams Per Watt, divide the total weight by the total power in watts.

How to Calculate Grams Per Watt?

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

  1. First, determine the total weight (g). 
  2. Next, determine the total power (watts). 
  3. Next, gather the formula from above = GPW = W / P.
  4. Finally, calculate the Grams 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 weight (g) = 780

total power (watts) = 1000


What is the significance of calculating Grams Per Watt (GPW)?
Calculating GPW is crucial in industries such as agriculture and manufacturing, where energy efficiency and the weight of products are key factors. It helps in optimizing processes, reducing energy consumption, and potentially lowering costs.

Can the Grams Per Watt formula be used for any type of energy source?
Yes, the GPW formula is versatile and can be applied to any energy source as long as the power output can be measured in watts and the weight in grams. This makes it a useful tool across various fields and applications.

How can improving the GPW ratio benefit a business or operation?
Improving the GPW ratio indicates more efficient use of energy in relation to the weight of the product or component. This can lead to cost savings, improved sustainability practices, and competitive advantages in the market.

Are there any limitations to using the Grams Per Watt calculation?
While useful, the GPW calculation may not provide a complete picture of energy efficiency or performance. Other factors such as the quality of output, durability, and environmental impact should also be considered for a comprehensive assessment.