What This Calculator Does

Paste a number list to see its count, sum, mean, median, modes, minimum, maximum and range. The mean summarizes the overall level, the median gives the middle sorted position, and modes identify the most frequently repeated values. Each answers a different question.

When to Use It

Use it for observations in the same unit, scores or quantities. Continue to the standard deviation calculator to measure spread. Use weighted grades for course components with different weights; this page gives every observation equal weight.

Inputs Explained

Separate values with commas, spaces, semicolons or new lines. Use a decimal point: 1,5 means two values rather than 1.5. Negative numbers, zero and exponent notation such as 1e3 are accepted. Limits are 10,000 values, 200,000 characters and an absolute magnitude of 1e100 per value.

Unit suffixes, thousands grouping, missing-value labels and expressions are rejected. Invalid observations are not silently removed. Inputs remain in the current page state.

How the Calculation Works

Sum adds every observation; mean divides that sum by the count. Compensated summation reduces cancellation when large positive and negative values offset each other, within floating-point limits.

Median sorts the numbers. For an odd count it uses the middle observation; for an even count it averages the two middle observations. All repeated values tied for the highest frequency are modes, in numeric order. This page reports no mode when every value occurs once; it does not estimate a continuous density peak.