TFT

Range Calculator

Find the difference between max and min values

How to Use This Range Calculator

1

Enter your numbers

Type or paste your numbers separated by commas. You can include decimals and negative values.

2

Click Calculate

The calculator finds the minimum, maximum, and computes the range automatically.

3

Review the results

See the range value along with the minimum and maximum numbers from your set.

Understanding Range in Statistics

The range is the simplest measure of spread in a dataset. It tells you how far apart the smallest and largest values are.

Range = Maximum Value - Minimum Value

A large range means your data is spread out. A small range means values cluster close together. The range is easy to calculate but sensitive to outliers — one extreme value can skew it.

Range Examples

Dataset: 5, 12, 3, 18, 7

Min=3, Max=18, Range=15

Dataset: 100, 95, 102, 98, 101

Min=95, Max=102, Range=7 (tight cluster)

Dataset: -10, 0, 5, 20, -5

Min=-10, Max=20, Range=30 (includes negatives)

Dataset: 2.5, 3.1, 2.8, 4.0, 3.5

Min=2.5, Max=4.0, Range=1.5 (decimals work)

When to Use Range

1

Quick data overview

Get an instant sense of data spread without complex calculations.

2

Quality control

Monitor process variation. A growing range may signal quality issues.

3

Comparing datasets

Compare spread across different groups or time periods quickly.

Frequently Asked Questions

What does range tell me about my data?
Range shows the total spread between your smallest and largest values. It gives a quick sense of variability but does not show how values are distributed in between.
Can range be negative?
No. Range is always zero or positive because you subtract the minimum from the maximum. Even with negative numbers in your dataset, the range itself is never negative.
What if all my numbers are the same?
The range is zero. This means there is no variation — every value equals the same number. This can happen in controlled processes or when measuring a constant.
How do outliers affect range?
Outliers have a large effect on range. One extreme value can make the range much larger than the typical spread. Consider using interquartile range (IQR) if outliers are a concern.
What is the difference between range and standard deviation?
Range uses only two values (min and max). Standard deviation considers every value and shows how much they typically deviate from the mean. Standard deviation is more robust but requires more calculation.

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