How to Increase a Number by a Percentage in Excel: A Simple Guide

If you need to increase a number by a percentage in Excel, it’s simpler than you might think. By using basic formulas, you can quickly adjust your numbers by any percentage you choose. This guide will show you step-by-step how to achieve this, ensuring your calculations are accurate and efficient.

Step-by-Step Tutorial: How to Increase a Number by a Percentage in Excel

We’ll walk through the process of increasing a number by a percentage. By the end of these steps, you’ll be able to modify any number in your Excel sheet with ease.

Step 1: Open Your Excel Spreadsheet

First, open the Excel file where you want to make the adjustment.

Make sure your file is saved and easily accessible. It’s always a good idea to keep a backup copy, just in case something goes wrong.

Step 2: Select the Cell With the Original Number

Next, click on the cell that contains the number you want to increase.

This step is crucial because it identifies the specific data you will be working with. Double-check that you have the correct cell selected before moving on.

Step 3: Choose an Empty Cell for the Formula

Click on an empty cell where you’ll enter your formula to calculate the increased number.

This ensures that you don’t overwrite any existing data. It’s best to choose a cell nearby for easy reference.

Step 4: Enter the Percentage in Another Cell

In a separate cell, type the percentage by which you want to increase the original number.

For example, if you want to increase the number by 20%, you would type "20%." This allows you to easily adjust the percentage later if needed.

Step 5: Write the Formula

In the empty cell you selected for the formula, type =A1*(1+B1) where A1 is the cell with the original number and B1 is the cell with the percentage.

This formula calculates the increased number by multiplying the original number by 1 plus the percentage. Make sure your cell references are correct.

Step 6: Press Enter

After typing the formula, press Enter on your keyboard to see the result.

Excel will instantly display the number increased by the specified percentage. If it doesn’t, double-check your formula for any errors.

Step 7: Copy the Formula (If Needed)

If you need to apply this calculation to multiple cells, you can copy the formula down the column.

Click and drag the fill handle (a small square at the bottom-right corner of the cell) to apply the formula to adjacent cells.

After completing these steps, the numbers in your selected cells will increase by the percentage you specified.

Tips for Increasing a Number by a Percentage in Excel

  • Always double-check your cell references to ensure the formula works correctly.
  • Use absolute references (like $A$1) if you’re copying the formula to multiple cells to avoid errors.
  • Keep your data and formulas in separate columns for better organization.
  • Save your work frequently, especially before making bulk changes.
  • Practice with a sample dataset if you’re new to Excel formulas.

Frequently Asked Questions

What if I want to decrease a number by a percentage?

To decrease a number by a percentage, use the formula =A1*(1-B1) instead.

Can I use this method for multiple percentages?

Yes, you can apply different percentages by entering them in separate cells and adjusting your formula references.

How do I format the percentage cell?

Right-click the cell, choose "Format Cells," and select "Percentage" from the list.

Can I increase numbers in a whole column at once?

Yes, you can apply the formula to an entire column by dragging the fill handle down.

What if the percentage isn’t showing correctly?

Ensure the cell is formatted as a percentage and that you typed the value correctly.


  1. Open your Excel spreadsheet.
  2. Select the cell with the original number.
  3. Choose an empty cell for the formula.
  4. Enter the percentage in another cell.
  5. Write the formula =A1*(1+B1).
  6. Press Enter.
  7. Copy the formula if needed.


Increasing a number by a percentage in Excel is a straightforward task that can save you a lot of time and effort. By following the simple steps outlined in this guide, you can ensure your calculations are both accurate and efficient. Whether you’re managing a budget, analyzing sales data, or just tinkering with numbers for fun, these skills are essential.

Feel free to experiment with different percentages and datasets to get comfortable with the process. And remember, practice makes perfect. The more you use these formulas, the more intuitive they’ll become.

If you found this guide helpful, consider exploring other Excel functions and formulas to expand your spreadsheet skills even further. Happy calculating!

Get Our Free Newsletter

How-to guides and tech deals

You may opt out at any time.
Read our Privacy Policy