Bench tools
Free precision tools for jewelry makers
Eight calculators and template generators, built by a jeweler who got tired of doing the same arithmetic on scratch paper.
- free
- no ads
- nothing stored
- runs in your browser
Ring Blank Calculator
Length of metal strip for any ring size, corrected for stock thickness at the neutral axis.
strip length, mmMetal Weight Calculator
Weight and cost of wire, sheet or tube across 14 metals, from sterling to platinum.
grams · priceBezel Strip Calculator
How much bezel strip a round, oval, square or freeform stone needs.
strip length, mmTapered Bezel Template
Printable annular template for a tapered bezel, sized to your stone and taper angle.
print at 1:1Wire Length Calculator
Wire needed for wrapping, coiling and spiral work before you cut from the spool.
wire length, mmJump Ring Calculator
Inside and outside diameter, total wire, aspect ratio and which weaves it will make.
ID · OD · ARRing Size Chart
Convert between US, UK, EU and Japanese sizes, or print a chart to size a finger.
US · UK · EU · JPSaw-Piercing Pattern Generator
Islamic geometric patterns for pendants and ornaments, printable at true size.
print at 1:1Hi, I'm Artem. I've been making jewelry since 2018 and building software for much longer. I kept reaching for a calculator app at the bench — scratch paper, occasional mistakes. It got old fast, so I built the tools I wanted.
Every tool shows its maths in plain language before the formula, and every result is a number you can cut to. Templates print at true size. Nothing is stored, nothing is tracked. Learn more about me, or read the tutorials on the Cold Brew Jewelry blog.
- Fine Silver
- 10.49 g/cm³
- Sterling Silver
- 10.36 g/cm³
- Copper
- 8.96 g/cm³
- 14K Yellow Gold
- 13.07 g/cm³
- 18K Yellow Gold
- 15.58 g/cm³
- Platinum
- 21.45 g/cm³