Ring cost estimator: price a ring from its metal weight
Enter the finished weight, pick the alloy and type your own price per gram, either for the alloy itself or the spot price of the pure metal. The estimator adds your casting loss allowance, labour, stones and margin, then shows the price, the metal you pay for and how much pure metal the piece contains. Every rate is yours, and nothing leaves the page.
3D Jewelry Designer1 min read
Estimate the cost
Enter your price per gram to see the cost. Nothing is sent anywhere; the sum happens on this page.
Need the weight first? Weigh your 3D file and come back with the number.
How the sum is built
The finished weight, plus your casting loss allowance, is the metal you pay for. That is multiplied by your price per gram of the alloy. If you entered the spot price of the pure metal instead, it is first scaled by the alloy's fineness: 14K is 583 parts per thousand gold, 18K is 750, platinum 950 is 950. Labour and stones are added as you enter them, and your margin goes on top of the whole cost.
What it does not include
The price of the alloying metals in a gold alloy is left out because it is small next to the gold itself. Setting charges per stone, findings, plating and hallmarking are not separate lines; put them into labour or stones if you include them in a quote.
Pricing a whole range
Working one ring at a time is fine for a commission. For a catalogue, the ring builder quotes every combination of band, head, metal and stone on the server, and can price the metal from each ring's measured weight, so the price a shopper sees matches the piece they built.
Questions
Should I use the price per gram of the alloy or of pure gold?
Whichever you are quoted. Suppliers often quote the spot price of the pure metal; the estimator then multiplies it by the alloy's fineness, the share of the alloy that is gold or platinum, so a 14K piece is priced on the gold it actually contains.
What is casting loss?
Metal that is poured but does not end up in the finished piece: the sprue, flashing and what polishing removes. Casters charge for it as an allowance on top of the finished weight, which is how it is added here.
Where do I get the weight?
From the 3D file. The metal weight calculator measures it in your browser, and its result links straight here with the weight and alloy filled in.
Related
- Weight, stones and cost-based pricing
How the app measures metal weight, side stones and carat from a 3D model, and how cost-based pricing turns that into a price.
- Jewellery alloy density table: gold, platinum and silver
Density of every common jewellery casting alloy in grams per cubic centimetre, with the supplier table each figure comes from.
- Metal weight calculator: weigh a ring from its 3D file
Drop a .3dm, .glb, .stl or .obj file and get the metal weight in every common alloy, net of the stones, with the stones counted. Free, in your browser.