Average Calculator
Average and sum of several values at once.
Average
30
Sum150
Count5
Median30
Minimum10
Maximum50
What is the Average Calculator?
The Average Calculator computes the sum, count, arithmetic mean, median, minimum and maximum of a list of numbers all at once — handy for exam scores, survey responses, or repeated measurements.
How to use it
Enter numbers separated by commas, spaces, or line breaks — any combination is recognized automatically. Press Calculate to see the results.
How it's calculated
| Metric | Method |
|---|---|
| Sum | Total of all values |
| Average | Sum ÷ count |
| Median | Middle value after sorting (average of two middles if count is even) |
| Min / Max | Smallest / largest value in the list |
Everyday examples
- Average of three values: 80, 90, 100 → (80 + 90 + 100) ÷ 3 = 270 ÷ 3 = 90.
- Exam score average: Korean 92, English 78, Math 85, Science 89 → (92 + 78 + 85 + 89) ÷ 4 = 344 ÷ 4 = 86.
- Weighted average: Midterm 70 (weight 40%) and final 90 (weight 60%) → 70 × 0.4 + 90 × 0.6 = 28 + 54 = 82. Unlike the plain average of 80, the result shifts toward the more heavily weighted final.
- Average vs. median: 10, 20, 30, 40, 250 → the average is (10+20+30+40+250) ÷ 5 = 70, but the median is the middle value after sorting, 30. With an outlier like 250, the median is the more stable representative value.
FAQ
What format should I use for numbers?
You can separate values with commas, spaces, or line breaks in any combination — '10, 20, 30' and '10 20 30' are read identically.
How is the median calculated?
Numbers are sorted in order and the middle value is taken. If the count is even, the median is the average of the two middle values.
What's the difference between average and median?
The average (arithmetic mean) sums all values and divides by the count, so it's heavily affected by outliers. The median is the middle value in sorted order, so it's less affected by extreme values.
How does the arithmetic mean differ from a weighted average?
The arithmetic mean adds every value with equal weight and divides by the count — the mean of 70 and 90 is (70+90)÷2 = 80. A weighted average applies different weights per value: a midterm of 70 (40%) and a final of 90 (60%) give 70×0.4 + 90×0.6 = 82, shifted toward the more heavily weighted final. This tool computes the arithmetic mean; for a weighted average, repeat each value by its weight or calculate it separately.
How does the average change if one value is removed?
Both the count and the sum change, so the average shifts. The average of 10, 20, 30, 40, 50 is 150÷5 = 30; remove 50 and it drops to 100÷4 = 25, while removing the smallest value 10 raises it to 140÷4 = 35. Removing a value above the average lowers it, and removing one below the average raises it.
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