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Weighted Average Calculator

Paste a list of numbers and get the mean, median, mode, range, sum, min and max at once — or compute a weighted average with full steps.

Separate numbers with commas, spaces or new lines. A decimal comma like 3,14 is understood — separate such numbers with spaces or new lines.

Processing... 0%
Parsing the numbers
Sorting the values
Computing the statistics

Result

This page opens the calculator directly in weighted average mode: enter one "value: weight" pair per line — like 80: 3 for a value of 80 that counts 3 times — and the weighted mean is computed with the complete working shown as a table.

The weighted average multiplies each value by its weight, sums those products, and divides by the sum of the weights: x̄ = Σ(value × weight) ÷ Σweight. For 80: 3, 90: 2 and 70: 1 that is (240 + 180 + 70) ÷ 6 = 490 ÷ 6 ≈ 81.67 — different from the plain mean of 80, because the weights shift the balance.

Weighted averages are everywhere: course grades with credit hours, final marks built from homework and exam percentages, portfolio returns weighted by position size, average prices weighted by quantity bought. The step table shows every value × weight product, so you can check each row against your source data before trusting the result.

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Executed in Browser

Your files and inputs never leave this device. Processing runs completely offline. 100% Secure.

Accepted Formats & Rules

  • Mean, median, mode(s), range, sum, count, minimum and maximum from one list of numbers.
  • Weighted average mode: value and weight pairs, one per line, with a step-by-step product table.
  • Sorted copy of your list plus honest mode detection, including a clear "no mode" verdict.

Key Benefits

✓ One paste gives you every basic statistic at once: mean, median, mode, range, sum, count, min and max.
✓ Numbers can be separated by commas, spaces or new lines, and decimal commas like 3,14 are understood.
✓ Everything is computed locally in your browser — your data never leaves the page.

Use Cases

  • • Paste a column of exam scores or survey answers and get the mean, median and mode in one run to see the typical value and whether outliers skew it.
  • • Compute a weighted course grade from "grade: credits" pairs — the step table shows every grade × credit product before the final average.
  • • Check the spread of monthly expenses or sensor readings at a glance: range, min, max and the sorted list come with every calculation.