Enter the total battery price ($) and the warranty length (months) into the Battery Pro Rata Calculator. The calculator will evaluate the Battery Pro Rata. 

Battery Pro Rata Formula

The following two example problems outline the steps and information needed to calculate the Battery Pro Rata.

BPR = BP / W


  • BPR is the Battery Pro Rata ($/month of warranty)
  • BP is the total battery price ($) 
  • W is the warranty length (months) 

To calculate a battery pro rata, divide the battery price by the total warranty length.

How to Calculate Battery Pro Rata?

The following steps outline how to calculate the Battery Pro Rata.

  1. First, determine the total battery price ($). 
  2. Next, determine the warranty length (months). 
  3. Next, gather the formula from above = BPR = BP / W.
  4. Finally, calculate the Battery Pro Rata.
  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 battery price ($) = 300

warranty length (months) = 6

BPR = BP / W = ?