Model Ship Rigging Calculator

Calculate thread diameter, rigging lengths, and ratline counts for scale model ship building.

Scale (1:X)

Mainmast Height (real feet)

Shroud Count

Stay Count

Ratline Spacing (real inches)

Tab to move between fields

Thread Diameter (mm)

0.4

Ratline Count

Model Mast Height15"

Total Rigging Length351"

Rig Complexity (1-10)9

How to Use This Calculator

Enter Scale (1:X), Mainmast Height (real feet), and Shroud Count.
Set Stay Count and Ratline Spacing (real inches).
Review Thread Diameter (mm) and Ratline Count.
Use Model Mast Height () and Total Rigging Length () to inform your decision.
Use the chart to visualize the results and explore different scenarios by adjusting inputs.

How the result changes with Scale (1:X)

Scale (1:X): Model scale denominator (e.g., 96 for 1:96 scale)
Mainmast Height (real feet): Real-world height of the main mast in feet
Shroud Count: Total number of shroud lines (both sides)
Stay Count: Number of forestays and backstays
Ratline Spacing (real inches): Real-world spacing between ratlines (horizontal rope rungs)

Identify Input Parameters
4 parameters
Scale (1:X) = 96, Mainmast Height (real feet) = 120, Shroud Count = 12, Stay Count = 6 = 5 input(s) provided
Calculate Thread Diameter
Thread Diameter
0.4 = 0.4
Calculate Ratline Count
Ratline Count
67 = 67
Calculate Model Mast Height
Model Mast Height
15 = 15
Calculate Total Rigging Length
Total Rigging Length
351 = 351