Free tool
Pareto calculator
The numbers, without the chart: total, share per category, cumulative percentage, ranking and the point where your threshold is crossed.
Your data
Calculations run in your browser. Saving uploads the analysis; asking AI sends its data for processing.
CSV, TSV or pasted spreadsheet cells. Delimiter detected automatically (7 data rows).
80%
7 valid categories · 0 rows excluded (empty label, invalid or non-positive value).
Saving supports up to 500 input rows. Duplicate labels are combined in the result.
Preview the first 20 usable rows
Login failures2100
Payment errors1400
Performance800
Billing questions400
Email delivery300
Feature requests180
Other120
Pareto calculation
3 categories account for 81.1% of total impact.
- Total
- 5,300
- Categories
- 7
- Vital few
- 3
- Top 20% share
- 66%
Priority #1
Login failures
39.62% of total · 2,100
Ranked contributors
| # | Category | Value | Share | Cumulative |
|---|---|---|---|---|
| 1 | Login failures Vital few | 2,100 | 39.62% | 39.62% |
| 2 | Payment errors Vital few | 1,400 | 26.42% | 66.04% |
| 3 | Performance Vital few | 800 | 15.09% | 81.13% |
| 4 | Billing questions | 400 | 7.55% | 88.68% |
| 5 | Email delivery | 300 | 5.66% | 94.34% |
| 6 | Feature requests | 180 | 3.4% | 97.74% |
| 7 | Other | 120 | 2.26% | 100% |
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The calculation
- 1. Sum every value to get the total.
- 2. Divide each value by the total for its share.
- 3. Sort descending and add the shares up one by one.
- 4. The categories before the threshold crossing are the vital few.
Prefer a visual? Generate a Pareto chart.