Power Calculators

x̄ Average Calculator

Calculate the arithmetic mean of two numbers and show their sum and count.

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Fill in the details and click Calculate to see your results.


Also available in our Android app, with charts and full breakdown tables.

📘 About the Average

The arithmetic average, also called the arithmetic mean, is the sum of the values divided by the number of values.

This calculator is designed for two numeric values and provides the sum as an additional check.

🧮 Formula

Arithmetic mean
Average = (x + y) ÷ 2

Where

  • x and y = the two numbers
Both values receive equal weight.

✏️ Worked example

Average of 18 and 24

You enter
Number 118
Number 224
You get
Arithmetic Average21
Sum42

The average is 21.

Try this example →

🧭 How to use this calculator

What you enter

  • Number 1
  • Number 2

What you get

  • Arithmetic Average
  • Sum

💡 Understanding the average

  • The average lies between the two values when both inputs are finite real numbers.
  • Both values contribute equally to the arithmetic mean.
  • For a larger data set, a dedicated multi-value statistics calculator is more appropriate.

❓ Frequently asked questions

What is an arithmetic average?

It is the sum of all values divided by the number of values.

Can the average be a decimal?

Yes. The average does not have to be a whole number.