How to Use AVERAGE / AVERAGEIF Functions in Excel (Video in Khmer)

Hello everyone! Today I show you very easy step-by-step how to use AVERAGE() function in Microsoft Excel.

AVERAGE is very important formula that help you calculate mean (average) of a list of numbers. For example: average score of students, average sales amount, average working hours — all very easy with this formula!

📚 Related Tutorial: Learn more foundational formulas in our guide on Top 15 Basic Excel Formulas for Beginners ↗!

🛠️ How AVERAGE Function Work?

The AVERAGE function add all numbers together and then divide by total count of numbers. It is same as this math:

Average = Total Sum ÷ Count of Numbers

Formula Syntax:

=AVERAGE(number1, [number2], ...)

Or use a range (most common way):

=AVERAGE(start_cell:end_cell)

⚠️ Important: AVERAGE automatically ignores blank cells and text values! Only numbers are counted.

📺 Example #1: Average Student Scores

Suppose column B has student scores and you want to find average score:

=AVERAGE(B2:B5)

• Result: 85.75 (85 + 92 + 78 + 88 = 343 ÷ 4 = 85.75)

📺 Example #2: Calculate Average Without AVERAGE Formula (Manual Way)

If you don't want to use AVERAGE(), you can also do it manually with SUM and COUNT:

=SUM(B2:B5) / COUNT(B2:B5)

• SUM(B2:B5) → add all scores together = 343
• COUNT(B2:B5) → count how many numbers = 4
• Result: 343 ÷ 4 = 85.75 (same result!)

📺 Example #3: Average Only Scores Above 80 (AVERAGEIF)

If you want average of only students who scored more than 80, use AVERAGEIF:

=AVERAGEIF(B2:B5, ">80")

• It will only average 85, 92, and 88 (skip 78 because it is not above 80).
• Result: 88.33

💡 Easy Pro Tips for AVERAGE Function

1. Quick AutoSum Shortcut: Select your number column → click AutoSum (Σ) on Home tab → choose Average. Excel write formula for you automatically!
2. Exclude Zeros from Average: If cell have 0 but you want to ignore it and only average real values:

   =AVERAGEIF(A1:A10, ">0")
   

3. Round the Average Result: If you want show only 2 decimal places:

   =ROUND(AVERAGE(A1:A10), 2)
   

4. Average Multiple Conditions (AVERAGEIFS): Want average of only students in class A with score above 80?

   =AVERAGEIFS(score_range, class_range, "A", score_range, ">80")