Enter the final bill amount ($) and the tip percentage (%) into the Reverse Tip Calculator. The calculator will evaluate and display the original bill amount before tip.

Reverse Tip Formula

The following formula is used to calculate the Reverse Tip.

IB = FB / (1+T/100)
  • Where IB is the original bill amount before tip ($)
  • FB is the final bill amount ($) 
  • T is the tip percentage (%) 

To calculate a reverse tip, take the final bill amount and divide it by the result of 1 plus the tip percentage over 100.

How to Calculate Reverse Tip?

The following example problems outline how to calculate Reverse Tip.

Example Problem #1:

  1. First, determine the final bill amount ($). 
    • The final bill amount ($) is given as: 100.
  2. Next, determine the tip percentage (%). 
    • The tip percentage (%) is provided as: 15.
  3. Finally, calculate the Reverse Tip using the equation above: 

IB = FB / (1+T/100)

The values given above are inserted into the equation below and the solution is calculated:

IB = 100 / (1+15/100) = 86.956 ($)

Example Problem #2: 

For this problem, the variables required are provided below:

final bill amount ($) = 200

tip percentage (%) = 20

Test your knowledge using the equation and check your answer with the calculator above.

IB = FB / (1+T/100) = ?