Simple and weighted means
Use one focused calculator for an equal-value data set or for grades, prices, quantities, and other weighted observations.
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Statistics · Simple & weighted
Average Calculator
Paste a set of values and get a clear arithmetic mean, or calculate a weighted average when every value should not count equally.
Numbers stay in your browser
Data set
Enter the values to average
How it works
From raw values to an auditable result.
The calculator keeps the arithmetic visible, which is especially useful when checking grades, reports, or pasted spreadsheet data.
- 01
Choose the average
Use Simple for an ordinary arithmetic mean or Weighted when each value contributes by a different amount.
- 02
Paste the data
Separate ordinary values with commas, spaces, semicolons, or lines. For weighted data, enter one value: weight pair per line.
- 03
Inspect the calculation
Copy the result and review the count, sum, range, total weight, and exact division used to produce it.
More than one result
The average, its inputs, and the math between them.
Honest input validation
Malformed tokens and invalid weighted rows are shown clearly, so an accidental word or missing weight cannot quietly distort the answer.
Useful context
Count, sum, minimum, maximum, range, weighted sum, precision controls, and a visible formula make the result easy to audit.
Average questions
Means, weights, pasted values, and privacy.
How do I calculate an average?+
Add every value, then divide the sum by the number of values. The calculator displays both parts of this formula.
What is a weighted average?+
A weighted average gives some values more influence than others. Each value is multiplied by its weight, those products are added, and the total is divided by the sum of the weights.
Can I paste values from a spreadsheet?+
Yes. Tabs and new lines work as separators, as do commas, spaces, and semicolons.
Can the calculator handle negative numbers and decimals?+
Yes. Signed values, decimals, and scientific notation are supported.
Why is my weighted average blank?+
At least one row must be valid and the total of all weights must be greater than zero.
Are my numbers uploaded?+
No. Parsing and calculation happen entirely in your browser.
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