1. What does this tool do
This free online statistics calculator gives you mean, median, mode, standard deviation, variance, percentiles (including quartiles), and a distribution chart from any list of numbers—instantly. Use it as a mean median mode calculator, percentile calculator, or for full descriptive statistics and data analysis. Paste your data from Excel or CSV and see results with no sign-up and no upload. Everything runs in your browser so your data stays on your device. Ideal for homework, surveys, quality control, or analyzing token counts from the Text Tokenizer.
2. How to use it
Quick start: Paste your numbers from Excel or CSV, see descriptive statistics (mean, median, standard deviation, variance, percentiles) and the distribution chart (histogram), then copy results or refine the list.
- Enter or paste numbers — Type numbers or paste a list (comma, space, or newline separated). The tool parses and validates the input.
- View statistics — Mean, median, mode, standard deviation, variance, and percentiles (including quartiles Q1, Q3) appear automatically.
- Check the chart — A distribution chart (histogram) shows how your data is spread. Use it to spot skew or outliers.
- Copy or refine — Copy results as needed; edit the list to add or remove values and see updated stats.
3. How it works
This tool computes descriptive statistics from your list: mean (average), median, mode, standard deviation, and variance using standard formulas. Percentiles use linear interpolation and include quartiles (Q1 = P25, Q3 = P75). The histogram is drawn client-side from the same data. All computation runs in the browser; no data is sent to any server.
4. Use cases & examples
- Descriptive statistics for homework or courses — Quick check of mean, median, and standard deviation for a dataset.
- Survey or experiment data analysis — Summarize numeric responses and see distribution.
- Quality control and process data — Monitor variance and spread without sending data elsewhere.
- With Text Tokenizer — Export word or token counts from the Text Tokenizer and paste here for frequency analysis.
Example
- Input: 3, 7, 7, 9, 14 → Mean 8, Median 7, Mode 7.
- Input: 10, 20, 30, 40, 50 → Mean 30, Std dev ~14.14 (sample).
5. Limitations & known constraints
- Numeric only — Non-numeric values are skipped; ensure your list is numbers only for correct results.
- Size limits — Very large datasets (e.g. millions of points) may slow the browser or hit internal limits.
- No significance tests — The tool does not compute p-values or hypothesis tests; use dedicated software for that.