Ring Blank Calculator
Calculate the metal strip length and width needed to fabricate a ring from US ring size, band width, and metal thickness.
Inputs
Results
Strip Length
58.8 mm
Strip Width
6 mm
How to Use This Calculator
- Enter the desired ring size using your regional sizing standard.
- Input the band width and thickness in millimeters.
- Select the metal alloy for density and shrinkage compensation.
- Review the blank length in mm needed to form the ring shank.
- Cut and form the blank, then solder the seam and clean up to final size.
How the result changes with US Ring Size
| US Ring Size | Strip Length | Strip Width |
|---|---|---|
| 2.5 | 47.33 mm | 6 mm |
| 6.25 | 56.89 mm | 6 mm |
| 11 | 69 mm | 6 mm |
| 15 | 79.2 mm | 6 mm |
What each input means
- US Ring Size
- US ring size (1-16, half sizes supported)
- Band Width
- Width of the ring band in millimeters (2-8mm typical)
- Metal Thickness
- Sheet metal thickness/gauge in mm (0.8-1.5mm typical for rings)
How this is calculated
Worked example, using the default values
- Identify Input ParametersUS Ring Size = 7, Band Width = 6, Metal Thickness = 1 = 3 input(s) provided
- Calculate Strip Length58.8 = 58.8
- Calculate Strip WidthStrip Width6 = 6
- Calculate Inner Circumference54.16 = 54.16
- Calculate Inner DiameterInner Diameter17.24 = 17.24
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