Snap & Rivet Sizing Calculator
Determine the correct snap size, post length, and hole punch size based on your leather thickness, number of layers, and snap type.
Inputs
mm
Results
Cap Diameter
12.7 mm
Recommended Post Length
6 mm
Minimum Post Length5 mm
Hole Punch Size4 mm
Cap Diameter0.5 in
Line NameLine 20
How to Use This Calculator
- Enter the total count of snaps or rivets needed for your project.
- Select the size (cap diameter in mm) appropriate for your leather thickness.
- Input the leather thickness in ounces to verify post length compatibility.
- Review the recommended post length for your combined leather layers.
- Order snaps or rivets with 10% extra for setup and mistakes.
What each input means
- Leather Layers
- Number of leather layers the snap/rivet passes through
- Total Thickness
- Combined thickness of all leather layers in millimeters
- Snap Type
- 1 = Line 20 (12.7mm, most common), 2 = Line 24 (15.2mm, heavy duty), 3 = Line 16 (9.5mm, small/light)
How this is calculated
Worked example, using the default values
- Identify Input ParametersLeather Layers = 2, Total Thickness = 4, Snap Type = 1 = 3 input(s) provided
- Calculate Cap DiameterCap Diameter12.7 = 12.7
- Calculate Recommended Post Length6 = 6
- Calculate Minimum Post LengthMinimum Post Length5 = 5
- Calculate Hole Punch SizeHole Punch Size4 = 4
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