Enter decimal values
Example data table
| Mode | Decimal Values | Weights | Count | Sum | Average |
|---|---|---|---|---|---|
| Standard | 2.50, 3.75, 4.10, 5.65, 6.20 | — | 5 | 22.20 | 4.44 |
| Weighted | 2.50, 3.75, 4.10, 5.65, 6.20 | 1, 2, 2, 1, 3 | 5 | 22.20 | 4.81 |
| Trimmed 20% | 2.50, 3.75, 4.10, 5.65, 6.20 | — | 5 | 22.20 | 4.50 |
Formula used
Standard average: Average = Σx / n, where Σx is the sum of all decimal values and n is the number of valid entries.
Weighted average: Weighted Average = Σ(w × x) / Σw, where each decimal value is multiplied by its weight before dividing by the total weight.
Trimmed average: Sort the values, remove the lowest and highest values equally using the selected trim percentage, then average the remaining values.
Support metrics: The calculator also reports median, minimum, maximum, range, and population standard deviation for better interpretation.
How to use this calculator
- Paste decimal numbers into the main list box. You may separate values with commas, spaces, semicolons, or new lines.
- Choose the average mode. Use standard for a normal mean, weighted for importance-based averaging, or trimmed to reduce outlier influence.
- Add weights only when weighted mode is needed. The weights list must align item-by-item with the decimal list.
- Set the trim percentage, output precision, and rounding style based on your reporting needs.
- Press Calculate Average to show the result block above the form. Then export the report as CSV or PDF.
FAQs
1. What does this calculator compute?
It computes a decimal average from your entered values and also reports totals, count, median, spread, standard deviation, and optional weighted or trimmed averages.
2. Can I use negative decimals?
Yes. The calculator accepts positive numbers, negative numbers, and zero. Negative decimals affect the sum, mean, range, and deviation exactly as expected.
3. How are invalid entries handled?
Non-numeric tokens are ignored during calculation. Their count appears in the result area, and the skipped entries are listed so you can fix them quickly.
4. When should I use weighted average mode?
Use weighted mode when some decimal values deserve more influence than others, such as graded scores, priced units, or repeated measurements.
5. What is a trimmed average?
A trimmed average removes equal portions of the lowest and highest sorted values before averaging. It helps reduce the effect of extreme outliers.
6. Do the weights need to match the value count?
Yes. Every decimal value needs a matching weight in the same order. The calculator stops weighted processing if the counts do not match.
7. What do the export buttons include?
The CSV and PDF exports include the main summary metrics and the cleaned value table, making it easier to archive, print, or share results.
8. Does rounding change the stored calculation?
No. Rounding changes the displayed and exported presentation only. The internal calculations are performed first, then formatted using your selected precision and mode.