Range Calculator

What is the Range Calculator?

Find the range, minimum and maximum of a data set. Range is the difference between the highest and lowest values, the quickest way to see how spread out a data set is.

How to use the Range Calculator

1. Paste or type your numbers into the box (a sample is pre-filled so you can see how it works).
2. Results update automatically as you type; you can also press Calculate.
3. Read the output: range, minimum, maximum.
4. Use the 📊 chart to see the result visually, then copy or share it.

Formula and method

Worked example

With the sample input, the Range Calculator returns range: 21; minimum: 9; maximum: 30.

Where the Range Calculator helps in real life

A weather enthusiast records daily highs for a month, from 12 °C to 27 °C. The range of 15 degrees shows how changeable the month was.

A teacher compares two classes with the same average score. The class with the much larger range has a wider gap between the strongest and weakest students.

Common mistakes to avoid

• Letting one data-entry error create a huge range.
• Using range alone to describe spread.
• Including blank or text cells from a spreadsheet.
• Comparing ranges from data sets of very different sizes.

💡 Practical tip: A single extreme value can make the range huge, so always look at the minimum and maximum before trusting it.

Tips for better results

• Check the minimum and maximum for typos first.
• Pair range with the standard deviation or IQR.
• Use quartiles when outliers are likely.

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