Class Width Calculator

Calculate the ideal class width for frequency distributions.

Data Parameters

Maximum Value

Minimum Value

Number of Classes

Calculation Results

Class Width20Raw: 20.0000Rounded up to ensure coverage

100

Raw Calculation20.00

Formula: Width = (Max - Min) / Classes

Note: The result is usually rounded up to the nearest whole unit.

About this calculator

Overview

The class width is the distance between value boundaries in a frequency distribution. It ensures that data is evenly divided into specific intervals.

💡

Pro Tips

Always round up the class width to the next integer or convenient decimal to cover the entire range.

Fun Facts

"Common rules for choosing the number of classes include Sturges' Rule and the Rice Rule."
"Class widths are usually rounded up to a convenient number."