This average calculator accepts a comma-separated list of numbers and reports the count, sum, and arithmetic mean in one pass.
Math
Average Calculator
Calculate the count, sum and arithmetic mean of a number list.
Calculator
About this calculator
Formula notes
mean = (x₁ + x₂ + … + xₙ) / n. For example, 10, 20, 30, 40 gives (10 + 20 + 30 + 40) / 4 = 25.
Worked examples
- Example: the list “10, 20, 30, 40” returns count 4, sum 100, and mean 25.
- For values 4, 8, 15, 16, 23, and 42, the sum is 108 and the arithmetic mean is 108 / 6 = 18.
How to use it
- Paste or type numbers separated by commas.
- Check the count to make sure every value was parsed.
- Use the sum and mean for budgeting, grading, or stats prep.
Frequently asked questions
Can I paste values separated by spaces?
Use commas to be safe; the parser reads a comma-separated list reliably.
How is this different from weighted average?
Here every value counts equally. Use the weighted-average tool when items have different weights.
Limits and interpretation
- The arithmetic mean gives every parsed value equal weight and can be strongly affected by outliers.
- A mean may be inappropriate for categories, rates with different denominators, or data requiring weights.