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Statistics Calculator

Compute mean, median, mode, standard deviation, quartiles and more.

Enter numbers (comma or newline separated):

About Statistics Calculator

Stop doing complex calculations by hand or searching for formulas. Statistics Calculator lets you compute mean, median, mode, standard deviation, quartiles and more in seconds with a clean, easy-to-use interface. Enter your values and get instant, accurate results along with step-by-step breakdowns where applicable.

How to Use

Enter your values Fill in the required input fields with your numbers. Use tab to move between fields quickly.

See instant results Results calculate automatically as you type — no need to press a button. Watch the output update in real time.

Review the breakdown Check the detailed breakdown, charts, or tables below the main result for a deeper understanding.

Adjust and compare Change any input value to instantly see how it affects the result. Great for comparing different scenarios.

🔒 Privacy note: All processing happens locally in your browser. Your data is never sent to any server.

Why Use Statistics Calculator?

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Accurate & Reliable Statistics Calculator uses standard mathematical formulas and algorithms, verified against reference implementations. Trust the results for homework, work, or personal use.

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Clear Explanations Get more than just a number. Where applicable, see step-by-step breakdowns, visual representations, and context that helps you understand the result.

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Instant Calculation Results update as you type — no need to press a calculate button or wait for a server response. Real-time feedback helps you explore different scenarios quickly.

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No Data Collection Your inputs are processed locally in your browser. No data is stored, transmitted, or used for any purpose. Close the tab and everything is gone.

Frequently Asked Questions

Sample standard deviation (s) uses n−1 in the denominator (Bessel's correction) and is used when your data is a sample from a larger population. Population standard deviation (σ) uses n in the denominator and is used when you have data for the entire population.

The median is the middle value when data is sorted in ascending order. If there is an even number of values, the median is the average of the two middle values.

IQR (Interquartile Range) = Q3 − Q1. It represents the spread of the middle 50% of data and is a robust measure of variability that is not affected by outliers. Values more than 1.5×IQR above Q3 or below Q1 are often considered outliers.

If all values appear the same number of times, the dataset is said to have no mode (or is amodal). If two or more values tie for the highest frequency, the dataset is bimodal or multimodal and all modes are listed.