Jewellery Making Calculators

The UK has a thriving handmade jewellery scene, from silver smithing studios in the Jewellery Quarter in Birmingham to beadwork makers selling through Not On The High Street and Etsy. Getting sizing right is crucial — a ring that does not fit or a bracelet that is too tight will result in returns and unhappy customers. Our ring size calculator converts between the UK letter system (A through Z), US numerical sizes and EU millimetre sizes, while the bracelet size calculator adds the correct comfort allowance to a wrist measurement.

Wire is one of the most versatile materials in jewellery making, but estimating how much you need for a project can be tricky. Our wire length calculator accounts for wraps, coils, frames and findings so you can order the right amount from UK suppliers like Kernowcraft, Cooksongold or The Bead Shop. For chainmaille work, the jump ring calculator helps you work out aspect ratios and quantities — essential for getting weave patterns like Byzantine or Persian to lie correctly.

If you are stringing necklaces or bracelets, the bead count calculator tells you exactly how many beads you need for a given length, factoring in bead diameter and spacing. The chain length calculator adds clasp allowance so your finished piece sits at the right position — whether that is a 40 cm choker or an 80 cm opera length. For earring makers, the earring weight calculator helps you keep designs comfortable. Most jewellers recommend keeping earrings under 7 to 10 grams per ear, and our tool estimates weight from your choice of metals, beads and findings.