Statistics Calculator

Calculate mean, median, mode, standard deviation, variance, quartiles, and more....

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Statistics Computed

Mean - Average of all values
Median - Middle value
Mode - Most frequent value
Std Dev - Spread measure
Quartiles - Q1, Q3, IQR
Range - Min to max spread

Why Use Statistics Calculator?

Complete Statistics

Calculate count, sum, mean, median, mode, variance, standard deviation, quartiles, and IQR.

Instant Results

Results update in real-time as you type. No waiting or button clicks needed.

Sample Datasets

Load pre-made datasets to test the calculator or understand statistical concepts.

Sorted Data View

See your data sorted automatically, making it easier to understand distribution.

Copy Results

One-click copy all statistics to clipboard for easy sharing or documentation.

100% Private

All calculations happen in your browser. Your data never leaves your device.

Who Uses This

Students

Analyze homework data, check answers, and understand statistical concepts.

Researchers

Quick descriptive statistics for preliminary data analysis.

Business Analysts

Analyze sales data, performance metrics, and survey results.

Healthcare

Analyze patient data, test results, and clinical measurements.

How It Works

1

Enter Your Data

Type or paste numbers separated by commas, spaces, or new lines. Decimal numbers are supported.

2

Review Parsed Numbers

The calculator shows how many valid numbers were found. Invalid entries are automatically ignored.

3

View Statistics

See comprehensive statistics organized into categories: central tendency, dispersion, and quartiles.

4

Copy or Export

Use the Copy All button to copy results to clipboard for reports or further analysis.

Statistics Tips

Outlier Detection

Values more than 1.5 * IQR below Q1 or above Q3 are often considered outliers in your data.

Mean vs Median

If mean and median differ significantly, your data may be skewed. Median is often more robust for skewed data.

Sample Size Matters

Statistics from small samples (< 30) may not be representative. Larger samples provide more reliable estimates.

Frequently Asked Questions

This calculator computes count, sum, mean (average), median, mode, minimum, maximum, range, variance, standard deviation, quartiles (Q1, Q3), and interquartile range (IQR).
Mean is the average (sum divided by count). Median is the middle value when data is sorted. Mode is the most frequently occurring value(s). Each measures central tendency differently and is useful in different contexts.
Standard deviation measures how spread out numbers are from their average. A low standard deviation means values cluster close to the mean, while a high standard deviation means values are more spread out.
Enter numbers separated by commas, spaces, or new lines. For example: '1, 2, 3, 4, 5' or '1 2 3 4 5'. Decimal numbers are supported. Invalid entries are automatically ignored.
Q1 (first quartile) is the 25th percentile, Q3 is the 75th percentile. IQR (Interquartile Range) is Q3 minus Q1 and represents the middle 50% of your data. These help identify data spread and potential outliers.
If all values appear with equal frequency (or each value appears only once), there is no mode. The calculator will display 'No mode' in this case.

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