Reverse Tip Calculator

Formula

The formula to calculate the reverse tip is:

\[ \text{IB} = \frac{\text{FB}}{1 + \frac{T}{100}} \]

Where:

$\text{IB}$ is the original bill amount before tip (in dollars)
$\text{FB}$ is the final bill amount (in dollars)
$\text{T}$ is the tip percentage (as a percentage)

What is a Reverse Tip?

A reverse tip calculation helps you determine the original bill amount before the tip was added. This can be useful for understanding the base cost of your meal or service before the gratuity was included.

Example Calculation

Example:

Final Bill Amount: $120
Tip Percentage: 20%

Step 1: Calculate the original bill amount:

\[ \text{IB} = \frac{120}{1 + \frac{20}{100}} = \frac{120}{1.20} = 100 \text{ dollars} \]