BenchMath: Jewelry Calc

Resident_Genius

About this app

BenchMath is a free jewelry calculator and jewelry log built for jewelers, metalsmiths and hobby casters at the bench. Jewelry calculator up front: it turns a wax model weight into the metal you need, so you can cast, cost and price without a spreadsheet.

WHAT IT CALCULATES
• Casting, wax to metal — enter wax weight in grams or pennyweight, choose an alloy by its specific gravity — 14k yellow gold, sterling silver, platinum, bronze and more — add a button and sprue allowance, and see the metal needed in grams, pennyweight and troy ounces, with and without the allowance.
• Melt value — weigh a lot, pick its metal and purity, enter the spot price, and see pure metal content, melt value and the value at your payout percentage.
• Ring blank length — from a US ring size, or your own inside-diameter measurement, plus stock thickness, for flat and half-round blanks, in millimetres and inches.
• Mill work — sheet weight from dimensions, wire weight from diameter and length, and wire length from weight, for the alloy you select.
• Converters — Brown & Sharpe gauge thickness, weight conversions between grams, pennyweight, troy ounces, ounces and carats, and alloy-to-alloy conversion with an optional loss percentage.

YOUR JEWELRY LOG
• Piece ledger — cost a finished piece from its metal weight and price, stones, findings, labour hours and rate, overhead and markup, then save it in the ledger with its total cost and suggested price and running ledger totals.
• Scrap lots — add melt lots to a scrap total that tracks value and pure metal weight across lots.
• Everything is saved on your device and works offline. You can also download the ledger as a CSV or backup file.

A SHOP FOR JEWELRY SUPPLIES
The Shop tab gathers jewelry-making supplies and tools from online sellers, so restocking starts where your math already lives. Prices and checkout stay with the seller.

LISTEN WHILE YOU WORK
Looking Glass Radio, our own live internet station, is built in — and off by default. Tap the ♪ button only if you want music while you work; tap again and it disconnects completely. Credit: background music made with lookingglassai.us.

THE DEAL
We don't collect your data — your numbers and logs never leave your device. The app is free; the shop links keep it that way. American owned · Veteran operated.

What’s new

First release.