Leather Thickness Converter

Convert between leather thickness units: millimeters, ounces, and irons. Instantly see equivalent values across all three measurement systems.

Inputs

Thickness Value

Input Unit

Tab to move between fields

Results

Millimeters

2 mm

Ounces

5 oz

Irons

5 irons

Inches0.08 in

Weight Class (1-5)0

How to Use This Calculator

Enter the leather thickness in ounces (1 oz = 0.4 mm) or millimeters.
Select the project type to see the recommended thickness range.
Review the converted measurements across ounce weight, millimeters, and inches.
For laminated layers, sum the individual thicknesses to estimate the finished stack height.
Skive (thin) leather at joins and folds to reduce bulk and improve flexibility.

How the result changes with Thickness Value

Thickness Value	Millimeters	Ounces	Irons
2.09	0.84 mm	2.09 oz	2.09 irons
7.06	2.82 mm	7.06 oz	7.06 irons
13	5.2 mm	13 oz	13 irons
18	7.2 mm	18 oz	18 irons

What each input means

Thickness Value: Enter the thickness value in your chosen unit
Input Unit: 1 = Millimeters, 2 = Ounces, 3 = Irons

How this is calculated

Worked example, using the default values

Identify Input Parameters
Thickness Value = 5, Input Unit = 2 = 2 input(s) provided
Calculate Millimeters
Millimeters
2 = 2
Calculate Ounces
Ounces
5 = 5
Calculate Irons
Irons
5 = 5
Calculate Inches
Inches
0.079 = 0.079
Calculate Weight Class
0 = 0

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