Enter decimal values with optional weights for flexible average computations in minutes. Toggle inclusions to test scenarios, exclude outliers, and refine results with confidence. Adjust decimal places, variance mode, and export sharable calculation summaries instantly. Designed for analysts, students, auditors, and everyday operational accuracy.
This example shows five decimal values with optional weights and inclusion flags. Use the "Load Example Data" button to instantly populate the calculator fields.
| # | Decimal Value | Weight | Include? | Notes |
|---|---|---|---|---|
| 1 | 10.25 | 1 | Yes | Standard entry |
| 2 | 15.75 | 2 | Yes | Weighted more heavily |
| 3 | 9.40 | 1 | Yes | Regular contributing value |
| 4 | 20.10 | 1 | No | Excluded as an outlier |
| 5 | 13.60 | 1 | Yes | Included in analysis |
Suppose you have five measurements: 10.25, 15.75, 9.40, 20.10, and 13.60. You decide 20.10 is an outlier and uncheck its Include box.
Keep weights as 1 for all other included values. The calculator then uses 10.25, 15.75, 9.40, and 13.60, giving a sum of 48.99.
The simple average is 48.99 ÷ 4 = 12.2475. With decimal places set to 2, it displays 12.25 as your average decimal result.
If you assign weight 2 to 15.75, the weighted average shifts upward, reflecting its stronger influence while still excluding the 20.10 outlier.
The simple average (arithmetic mean) is: Average = (Σ x) / n, where x are included decimal values and n is the count of included values.
The weighted average is: Weighted Average = (Σ (x · w)) / (Σ w), where w are non-negative weights assigned to each included value. If no weights are entered, each value uses weight 1.
Variance can be computed as population or sample: for population, divide Σ(x − mean)² by n; for sample, divide by n − 1 when at least two values exist.
Paste values into the bulk field or type them directly into rows. Assign weights where needed, and uncheck "Include" to exclude outliers without deleting.
Select decimal places for display and choose variance mode for your analysis standard. Click "Calculate Average" to generate averages and spread metrics instantly.
Load the example dataset to understand every feature quickly. Export CSV for spreadsheets or create a PDF summary for reports, audits, and documentation.
Handle many decimal entries with weights, inclusions, and precision control. Instantly compute simple average, weighted average, variance, and standard deviation. CSV and PDF exports provide clean, verifiable records for audits and analysis.
Apply this tool to pricing analysis, laboratory results, grading systems, production checks, energy consumption tracking, and financial ratios where decimal precision strongly influences decisions.
Non-numeric inputs are rejected gracefully to prevent incorrect summaries. You can set displayed precision between zero and ten decimal places. Internal calculations maintain accuracy before rounding for final presentation.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.