Average Calculator
Sum ÷ count. Click any i for detail.
Numbers
Numbers
i
List
Comma or space separated. |
|---|
How to use this calculator
- Paste your numbers separated by commas or spaces.
- Read the arithmetic mean, sum, and count.
- Use the breakdown to spot typos in long lists.
- Switch to weighted average if items have different weights.
Results explained
The arithmetic mean is sum divided by count. It is pulled by outliers. Median and mode describe the middle and most common value on other pages.
Quick reference: mean
Mean is the everyday average: add everything, divide by how many.
| Item | Detail |
|---|---|
| Formula | mean = sum / n |
| Empty list | No result |
| Outliers | One huge value moves the mean |
| Weighted | Use weights when grades or credits differ |
Credits and category weights need the weighted average page.
How the estimate is built
mean = (x₁ + x₂ + … + xₙ) / n.
Example scenario
10, 12, 15, 18, 20 → mean 15 (sum 75, n 5).
FAQ
Is average always the best center?
Not when outliers dominate. Median can be better for skewed pay or home prices.
How do weighted grades work?
Multiply each score by its weight, sum, then divide by total weight.
Can I paste decimals?
Yes. Commas and spaces both separate values.