Enter the initial area and the final area into the Reduction of Area Calculator. The calculator will evaluate the Reduction of Area.

## Reduction of Area Formula

The following two example problems outline the steps and information needed to calculate the Reduction of Area.

ROA = TR / IA * 100
• Where ROA is the Percentage Reduction of Area (%)
• IA is the initial area
• TR is the total reduction

To calculate the percent reduction of area, divide the total reduction by the initial area, then multiply by 100.

## How to Calculate Reduction of Area?

The following example problems outline how to calculate Reduction of Area.

Example Problem #1:

1. First, determine the initial area.
• The initial area is given as: 10.
2. Next, determine the final area.
• The final area is provided as: 3.
3. Finally, calculate the Reduction of Area using the equation above:

ROA =(IA-FA) / IA * 100

The values provided above are inserted into the equation below and computed.

ROA =(10-3) / 10 * 100 = 70.00 (%)

Example Problem #2:

For this problem, the variables required are provided below:

initial area = 6

final area = 4