# Statistics Calculator > Compute mean, median, mode, range, variance, standard deviation, and quartiles from a list of numbers. URL: https://uttir.com/statistics-calculator Categories: math-tools Privacy: Your numbers are processed entirely in your browser. Nothing is uploaded — close the tab and the data is gone. ## About Descriptive statistics turn a long list of numbers into a few numbers that describe the whole list at a glance — how big the typical value is, how spread out it is, and where most of the values cluster. This calculator handles the standard set: count, sum, min, max, range, mean, median, mode, variance, standard deviation, and the 25th / 75th percentiles (Q1 / Q3). Paste any whitespace- or comma-separated list of numbers, hit Compute, and read the results. Useful for grades, experiment data, finance, and quick sanity checks before pushing data into a spreadsheet or a stats package. ## How to use 1. **Enter your numbers** — Paste any list separated by spaces, commas, or new lines. 2. **Compute** — Press the button or just keep typing — results update as you go. 3. **Read the results** — Central tendency (mean / median / mode) and spread (variance / std dev / IQR) are shown side by side. ## Examples ### Test scores for a class Ten scores out of 100. Want to know the class average and how spread out the grades are. Input: ``` 78 82 91 65 88 73 95 81 70 84 ``` Output: ``` Mean 80.7 · Median 81.5 · Std dev 8.96 · Range 30 ``` ### Daily pageviews for a week Quick sanity check before logging into a real analytics tool. Input: ``` 1240, 980, 1110, 1450, 1320, 1075, 1690 ``` Output: ``` Mean 1266 · Median 1240 · Std dev 226 · Range 710 ``` ## FAQ ### What is the difference between mean and median? The mean is the arithmetic average — sum divided by count. The median is the middle value when the list is sorted. Median is more robust to outliers: in the list 1, 2, 3, 4, 1000 the mean is 202, but the median is 3. ### Population vs sample standard deviation? This calculator uses population standard deviation (divides by N). For sample standard deviation (divides by N − 1), most stats packages default to that — swap the denominator when you need it for a small sample from a larger population. ### What are Q1 and Q3? Q1 is the 25th percentile — 25% of values are below it. Q3 is the 75th percentile. The difference, IQR, is a robust measure of spread that is unaffected by extreme values. ### How are numbers parsed? Any token that looks like a number (with optional sign, decimal, or scientific notation) is kept. Letters, units, and empty cells are ignored — so "10 kg, 20 kg, 30 kg" parses to [10, 20, 30]. ## Related tools - [Loan Calculator](https://uttir.com/loan-calculator) — Calculate monthly payments, total interest, and a full amortization schedule for any loan. - [Percentage Calculator](https://uttir.com/percentage-calculator) — Three percentage tools in one: percent of a value, ratio as a percent, and percent change. - [Unit Converter](https://uttir.com/unit-converter) — Convert length, weight, temperature, area, volume, speed, time, and data units instantly. --- For the full HTML page with the live tool, visit https://uttir.com/statistics-calculator. This file is the markdown rendering at https://uttir.com/statistics-calculator.md. See https://uttir.com/llms.txt for a site-wide summary.