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Fast and forgiving addition. Just paste your messy data, numbers, or accounting lines—we'll ignore the text and give you the exact sum, count, and average.
Last updated: March 3, 2026
You don't need to put a plus sign (+) between everything. Commas, spaces, and even new lines all work perfectly to separate your numbers.
A sum is the total obtained by adding a set of numbers. It powers everything from budgeting and invoice reconciliation to grades, analytics dashboards, and scientific data processing. In real workflows, raw data is often messy; this sum calculator extracts numeric values from pasted text and computes total, count, and average in one step.
In math, summation is written with Sigma (S): for example, S(i=1..n) x_i means "add all terms from 1 through n." This tool performs the same operation, then also reports count and arithmetic mean.
Parsed numbers = values extracted from input textSum = x1 + x2 + ... + xnCount = n (how many valid numbers were found)Average (mean) = Sum / CountInternally, the parser splits on non-numeric separators and keeps valid numeric tokens (including negatives and decimals), then reduces them into a total and mean.
Input: 125.40, 39.99, 220, 17.75
Sum: 403.14 · Avg: 100.785
Input: 88 92 75 95 90
Sum: 440 · Avg: 88
Input: -2.5, 1.2, 0.8, -0.4, 3.0
Sum: 2.1 · Avg: 0.42
Same values, different data behavior. This table helps users compare how sum and average react to count, negatives, and outliers.
| Dataset | Count | Sum | Average | Observation |
|---|---|---|---|---|
| 10, 10, 10, 10 | 4 | 40 | 10 | Perfectly uniform set |
| 5, 10, 15, 20 | 4 | 50 | 12.5 | Spread raises mean above 10 |
| 100, 100, 100, -50 | 4 | 250 | 62.5 | Negative value pulls average down |
| 1, 2, 3, 4, 100 | 5 | 110 | 22 | Outlier strongly skews mean |
Need a clean table format for docs, reports, or notes? Use this Markdown comparison of typical sum outcomes.
| Dataset | Count | Sum | Average | Insight |
|---|---:|---:|---:|---|
| 10, 10, 10, 10 | 4 | 40 | 10 | Uniform values keep mean stable |
| 5, 10, 15, 20 | 4 | 50 | 12.5 | Wider spread shifts the mean |
| 100, 100, 100, -50 | 4 | 250 | 62.5 | One negative lowers total and average |
| 1, 2, 3, 4, 100 | 5 | 110 | 22 | Outlier strongly skews average |Help your team save time when pasting messy numbers out of PDFs or emails.
Suggested hashtags: #DataAnalysis #Accounting #MathHelp #Statistics #Productivity