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Average Calculator

Calculate the arithmetic mean of a set of numbers instantly.

What this tool does

Calculate the arithmetic mean of a set of numbers instantly. You fill in these fields: Numeric dataset. It shows arithmetic mean, total sum, and count.

Inputs

  • Numeric dataset: Longer text, up to 5000 characters. Enter numbers separated by commas or spaces.

How to use

  1. Type the numeric dataset.
  2. Read the result: arithmetic mean, total sum, and count. It appears once every required field has a valid value.

Worked examples

Example 1. Inputs:

  • Numeric dataset: "10, 20, 30, 40, 50"

Results:

  • Arithmetic mean: 30
  • Total sum: 150
  • Count: 5

How this is worked out: Sum = 10 + 20 + 30 + 40 + 50 = 150. Count = 5. Mean = 150 / 5 = 30.

Example 2. Inputs:

  • Numeric dataset: "78 85 92 88 76"

Results:

  • Arithmetic mean: 83.8
  • Total sum: 419
  • Count: 5

How this is worked out: Sum = 78 + 85 + 92 + 88 + 76 = 419. Count = 5. Mean = 419 / 5 = 83.8.

Example 3. Inputs:

  • Numeric dataset: "-4, 2.5, 1.5, 6"

Results:

  • Arithmetic mean: 1.5
  • Total sum: 6
  • Count: 4

How this is worked out: Negatives and decimals: sum = -4 + 2.5 + 1.5 + 6 = 6. Count = 4. Mean = 6 / 4 = 1.5.

Example 4. Inputs:

  • Numeric dataset: "7"

Results:

  • Arithmetic mean: 7
  • Total sum: 7
  • Count: 1

How this is worked out: One value: the mean of a single number is that number. Sum = 7. Count = 1. Mean = 7 / 1 = 7.

Limitations

  • Gives the plain arithmetic mean only. Every value counts equally, so weighted averages are not calculated.
  • Outliers pull the mean up or down, so the mean can sit far from a typical value.

FAQs

Q: Does the calculator skip entries that are not numbers?
A: No. Every entry must be a number. If an entry such as abc is not a number, the tool names it and shows no result.
Q: How do I separate the numbers?
A: Use commas or spaces between the numbers. Semicolons and new lines also work.
Q: Can the numbers be negative or have decimals?
A: Yes. Negative numbers and decimals are included in the sum and the count.
Q: What is the arithmetic mean?
A: The mean is the sum of all the numbers divided by how many numbers there are.

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