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All Tutorials /MS Excel

How to Calculate Sum in MS Excel

Updated on:
May 12, 2026
By:
Madhav Bhandari
Use this interactive demo to learn how to add up values instantly using Excel's SUM formula.

Quick summary

The SUM function in Microsoft Excel lets you instantly calculate totals across a range of cells using the AutoSum button or a manual formula. This step-by-step demo walks you through the fastest way to add up numbers in any Excel spreadsheet.


Steps

  1. Open your Excel spreadsheet where you want to calculate the total.
  2. Click on the cell where you want the sum to appear.
  3. Locate the AutoSum (Σ) button in the ribbon and click it to apply the SUM formula.
  4. Press Enter to confirm, and the calculated sum will display in the selected cell.

📌 Why this matters

Knowing how to calculate a sum in Microsoft Excel is one of the most essential spreadsheet skills for students, analysts, and business professionals alike. The SUM function and AutoSum tool allow users to instantly total rows or columns of data without manual arithmetic, saving time and reducing errors. Whether you are building a budget, tracking sales figures, or analyzing datasets, mastering Excel's SUM formula is a foundational step toward efficient data management. This demo provides a clear, visual walkthrough so anyone can apply the technique immediately.
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