Range Calculator
Calculate the range (maximum minus minimum) of any dataset. Also shows the IQR for a more robust measure of spread.
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📖 How to Use
Step 1: Enter your numbers separated by commas or spaces. Click "Example" for a demo dataset.
Step 2: Click "Calculate" for instant results with box plot and interpretation.
Step 3: Use "Copy" or "CSV" to export results. Click "Recalculate" to try new data.
What Is the Range?
The range is the simplest measure of spread: Range = Maximum − Minimum. It tells you the total extent of the data but is extremely sensitive to outliers. A single extreme value can dramatically change the range while leaving other statistics nearly unchanged.
Range vs IQR
The IQR (Q3 − Q1) measures the spread of only the middle 50% of data, making it resistant to outliers. For robust analysis, the IQR is preferred. The range remains useful for quick assessment of data extent and for detecting data entry errors (unusually large ranges often indicate errors).
❓ Frequently Asked Questions
Why is the range not a good measure of spread?
Because it uses only two values (min and max) and is extremely sensitive to outliers. A single extreme value can make the range very large even if most data is tightly clustered.
🔗 Related Calculators
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Complete descriptive statistics
🔢 Quartile Calculator
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📏 IQR Calculator
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🎯 Outlier Detection
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📦 Box Plot
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➗ Mean Calculator
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📐 Standard Deviation
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