Jewelry resin calculator
Resin jewelry works with tiny amounts, where a ratio error shows up much more. Here is how to calculate small molds, which resin to use, and how to get clear, bubble-free pieces.
How to calculate resin for jewelry
Each mold is a small volume: length x width x depth in cm, or its capacity in milliliters if you know it. Multiply by the number of pieces and convert to grams with the density. Since the amounts are so small, round up slightly: it is very easy to come up short.
Which resin to use
For jewelry you use a crystal-clear coating resin (like Crystal): very transparent, fast curing and made for small silicone molds. Deep pour resins are unnecessary at these depths and cure too slowly.
Bubbles and precision
Always weigh the two parts with a 0.1 g scale; by eye, at such small amounts, the ratio drifts easily. Mix slowly, let the resin rest a few minutes and pass a torch or lighter from a distance right after pouring to release bubbles.
Example: set of pendants
- Piece
- 5 × 3 cm
- Depth
- 0.5 cm
- Volume/piece
- 7.5 cm³
- Pieces
- 6
- Mix (+10%)
- ≈ 55 g
Note: For jewelry it pays to mix a touch extra: a 0.1 g scale avoids ratio errors.
Want the exact amount for your piece, with the A:B ratio and layer plan?
Calculate my jewelryFrequently asked questions
How much resin do I need for jewelry?
Very little: calculate the volume of each mold and multiply by the number of pieces. A set of 6 small pendants usually needs less than 60 g of mix.
Which resin is best for jewelry?
A crystal-clear coating (like Crystal): very transparent, fast curing and good in small silicone molds. Deep pours are unnecessary for these depths.
How do I avoid bubbles in small pieces?
Mix slowly, let the resin rest a few minutes and pass a torch or lighter from a distance right after pouring. Work at 22-25 °C so the resin is less viscous.