Free tools for jewelers and workshops.
The everyday math of the bench and the counter, done in seconds: alloys, karats, metal loss, rolling, solder, ring sizes and today's metal price in dollars or pesos. No sign-up, nothing to install.
Joyeros tools
Metal prices and quotes
Gold price today
Today's gold price per gram and per ounce, and what a piece is worth by weight and karat.
Silver price today
Today's silver price per gram and per ounce, and what a piece is worth by its fineness.
Platinum price today
Today's platinum price per gram and per ounce, and what a Pt950, Pt900 or Pt850 piece is worth.
Price per karat
Build the price-per-gram table for 8K to 24K gold (or .925, .950 and .999 silver) from the market price plus your premium for grain, wire, sheet or chain.
Scrap gold value
Estimate what scrap gold or silver is worth by its fineness and the market price.
Cost and margin calculator
Work out a piece's selling price from its costs and the margin you want to keep.
Workshop and casting
- New
3D jewelry scale
Upload your piece's 3D file (STL, OBJ, GLB, GLTF or FBX) and see what it would weigh in gold, silver or platinum.
Gold alloy
Work out how much silver and copper to add to lower the karat.
Raise karat
Raise your gold's karat by adding pure 24K gold.
Scrap mixing
Mix gold lots of different karats into one even ingot and know its karat.
Metal loss
Work out net weight and the metal lost per technique (melting, lost-wax casting, sandblasting, dirty scrap) from adjustable starting values, and what it costs.
Rolling mill
Enter the shape, size and length: get the grams to put through the rolling mill or drawplate, the edge loss and today's cost.
Solder calculator
Choose the right grade (hard, medium or easy) and work out the grams per joint type for gold and silver.
Sizes and conversions
Ring size converter
Convert ring sizes between the US and Mexico, Europe, Japan and the UK without hunting for charts.
Weight converter
Convert any weight between the 6 units used in jewelry worldwide, with a note on when each one is used.
Jeweler's calculator
Arithmetic with weight units: grams, troy ounces, pennyweights.
Start organizing your jewelry store today.
Create your free account and add your first pieces in minutes. When you need more capacity or tools for your team, choose the plan that fits your business.
Some features depend on your plan. See the pricing table for what each plan includes.