Resin Jewelry Calculator
Calculate exact resin amounts for earrings, pendants, rings, and bracelets. Preset dimensions for common molds. Batch production for Etsy sellers. No sign-ups. Instant results.
💡 Quick reference
Small studs (10mm): ~1.5ml per piece ·
Dangle earrings (30mm): ~5.6ml per piece
Medium pendant (40mm): ~15ml ·
100ml batch: makes ~15–20 pairs of small earrings
Select a preset below or enter your exact mold dimensions. Always add 10% buffer.
💡 Use high-quality silicone jewelry molds for clean release. Measure cavities with digital calipers for accuracy.
Example calculation
A pair of medium dangle earrings — the most common Etsy jewelry item:
| Parameter | Value |
|---|---|
| Jewelry type | Dangle earrings (medium) |
| Mold shape | Round |
| Diameter | 30mm |
| Depth | 8mm |
| Quantity | 2 pieces (1 pair) |
| Add 10% buffer | Yes |
| Total resin needed | 12.4ml (or ~15.5 grams) |
Calculation: π × 15mm² × 8mm depth × 2 pieces ÷ 1000 = 11.3ml + 10% buffer = 12.4ml
Common resin jewelry sizes & resin amounts
Quick reference for standard mold sizes. All amounts include a 10% buffer. For your exact mold dimensions, use the calculator above.
| Jewelry Type | Typical Size | Per Piece | Per Pair / Batch of 10 |
|---|---|---|---|
| Small Studs | 10mm D × 6mm deep | ~0.6ml | ~1.3ml / ~6.5ml |
| Medium Studs | 15mm D × 8mm deep | ~1.6ml | ~3.5ml / ~17.5ml |
| Dangle Earrings (small) | 20mm D × 7mm deep | ~2.4ml | ~5.3ml / ~26ml |
| Dangle Earrings (medium) | 30mm D × 8mm deep | ~5.6ml | ~12.4ml / ~62ml |
| Pendant (small) | 25mm D × 10mm deep | ~5.5ml | — / ~60ml |
| Pendant (medium) | 40mm D × 12mm deep | ~15ml | — / ~165ml |
| Pendant (large) | 50mm D × 15mm deep | ~33ml | — / ~360ml |
| Ring Band | 18mm D × 6mm wide | ~1.5ml | — / ~17ml |
| Bangle / Bracelet | 65mm D × 12mm wide | ~28ml | — / ~308ml |
💡 Most popular: 30mm dangle earrings and 40mm medium pendants. Both sizes are ideal for beginners — enough resin to work with comfortably, small enough to cure quickly.
UV resin vs epoxy resin for jewelry — which to choose
The choice between UV resin and two-part epoxy affects your workflow, production speed, and the type of jewelry you can make. Neither is universally better — they suit different situations.
| Factor | UV Resin | Two-Part Epoxy |
|---|---|---|
| Cure time | 2–5 minutes under UV lamp | 24–48 hours at room temp |
| Max thickness | ~10mm (UV can't penetrate deeper) | Unlimited (in thin layers) |
| Mixing required | No — single component | Yes — Part A + Part B |
| Shelf life (open) | Shorter — must avoid light exposure | Longer — store sealed in dark |
| Best for | Studs, thin pendants, high-volume production | Pendants, thick pieces, embeddings |
| Cost | Higher per ml | Lower per ml at gallon pricing |
When to choose UV resin: You are making high volumes of small, thin pieces (earring studs, thin pendants under 10mm) and production speed matters. The 2–5 minute cure cycle means you can complete a full batch in an afternoon rather than waiting overnight. Use a 36W+ UV curing lamp — weak lamps leave soft centres in anything over 5mm thick.
When to choose two-part epoxy: You are making thicker pieces, multi-layer designs with embedded dried flowers or foil, or any piece where you want the deepest possible clarity. Two-part epoxy also has a longer working time (30–45 minutes) which gives you more control over colour mixing and embedding. Use the Resin Ratio Calculator to get exact Part A and Part B weights for your brand's mixing ratio.
Batch production: how much resin for an Etsy run
Planning batch quantities before mixing prevents mid-session shortages and reduces material waste. Here are the figures for the most common Etsy jewelry batches.
| Batch | Resin Needed | Est. Material Cost | Est. Retail Value |
|---|---|---|---|
| 10 pairs small studs | ~13ml | $0.65 | $80–120 |
| 10 pairs dangle earrings (30mm) | ~124ml | $6.20 | $150–250 |
| 10 medium pendants (40mm) | ~165ml | $8.25 | $200–400 |
| Mixed batch (5 pairs earrings + 5 pendants) | ~144ml | $7.20 | $175–300 |
Material cost assumes gallon-kit pricing (~$0.05/ml). Retail estimates based on Etsy market data for handmade resin jewelry. Use our Resin Cost Calculator for exact figures based on your product prices and hourly rate.
Batch mixing strategy: For mixed batches, calculate your total resin needed using the calculator above, then use the Resin Ratio Calculator to split that total into exact Part A and Part B weights. Mix all resin at once for pieces of the same colour to stay within the 30–45 minute working time. Switch colours between batches rather than mid-batch.
Embedding in resin jewelry — flowers, glitter, and foil
Embedded elements are what differentiate handmade resin jewelry from mass-produced pieces. The technique for all embeddings follows the same two-layer principle.
The two-layer embedding technique
Pour a base layer approximately one-third full. Let it reach a tacky stage — firm but not set, typically 30–60 minutes depending on temperature (see the temperature guide for timing at different workspace temperatures). Place your embedding on the tacky surface using tweezers, pressing gently to adhere. Then pour the remaining resin to fill the mold completely. This prevents the embedding from floating to the top or sinking to the bottom.
Embedding types and preparation
🌸 Dried flowers
Use only fully dried or pressed flowers — never fresh ones. Moisture causes resin to cloud and flowers to rot inside the piece. Seal with Mod Podge before embedding to prevent colour bleed. Buy pre-pressed flowers for consistent results.
✨ Glitter and flakes
Fine craft glitter suspends well in resin when mixed at the colour stage. Chunky glitter and gold foil flakes layer best — place onto the tacky base layer. Use resin-safe glitter; standard craft glitter fades over time.
📷 Photos and prints
Seal printed paper with Mod Podge or laminate before embedding — unsealed paper absorbs resin and turns transparent. Allow 2–4 hours drying time after sealing before placing in resin.
🔮 Sphere and dome pieces
Use sphere molds for pendants and earrings with maximum internal depth. The domed shape magnifies embeddings beautifully. Pour in two half-sphere halves and join with a thin resin layer while both halves are still slightly tacky.
Jewelry findings: turning resin pieces into wearable jewelry
Findings are the hardware components that transform a cured resin piece into finished jewelry. Choosing the right findings for each piece type and attaching them correctly is the final step in producing sellable jewelry.
| Jewelry Type | Finding Needed | Attachment Method |
|---|---|---|
| Stud earrings | Flat pad stud posts | Glue with E6000 after full cure |
| Dangle earrings | Earring hooks + jump rings | Drill 1–2mm hole, add jump ring, attach hook |
| Pendants | Jump ring + chain | Insert eye pin before cure or drill after |
| Rings | Ring blanks (adjustable base) | Glue cured resin piece to ring blank |
| Keychains | Lobster clasp + split ring | Drill hole, add jump ring, attach hardware |
Drilling tip: Use 1–2mm diamond drill bits for drilling holes in cured resin. Standard metal drill bits crack resin at small diameters. Drill slowly with light pressure and keep the bit wet to prevent heat buildup.
Gluing tip: E6000 craft adhesive creates a permanent, flexible bond for attaching findings to resin pieces. Allow 24 hours cure time before wearing or packaging.
Resin jewelry making tips
📏 Measure molds precisely
Use digital calipers to measure mold cavities. Being off by 2–3mm changes resin volume significantly for small pieces. The calculator uses your exact measurements, not approximations.
🎨 Mix small batches
For jewelry, mix 20–50ml at a time. Resin starts setting in 30–45 minutes at 70°F — smaller batches give you more working time and prevent waste when making mixed colour runs. Use the Resin Ratio Calculator for exact Part A/B splits.
🌡️ Temperature affects small molds most
Cold resin thickens significantly and does not flow into small mold cavities cleanly. Below 65°F you will get air pockets and incomplete fills in small earring molds. Work at 70–75°F. See the temperature guide if your workspace runs cold.
🔗 Insert findings before curing
Insert eye pins or embed jump rings while resin is still liquid — position them in the top portion of the mold while holding with tweezers. Far easier than drilling after cure, and creates a stronger bond.
🛒 Shop supplies: Resin Kits • Jewelry Molds • Pigments • Dried Flowers • Sphere Molds
Resin jewelry calculator FAQs
How much resin do I need for earrings?
Most earring molds need 5–15ml of resin per pair depending on size. Small studs (10mm) use about 1.3ml per pair. Medium dangles (30mm) use about 12.4ml per pair. Large statement earrings (50mm) use 70ml or more per pair. Always add 10% extra. Use the calculator above with your exact mold diameter and depth for a precise figure.
How do I measure my jewelry mold dimensions?
Use digital calipers or a ruler to measure the cavity in millimetres. For round molds, measure the diameter across the widest point of the cavity. For rectangular molds, measure length and width. Always measure depth from the rim of the mold to the bottom of the cavity — not the total thickness of the mold material, which is thicker.
Should I add extra resin for jewelry projects?
Yes — always add 10–15% extra. Small molds hold very little resin, so running short by even 2–3ml means you cannot finish the piece. The buffer covers resin stuck in your mixing cup, absorbed by stir sticks, and lost to bubble popping. For batch production, never skip the buffer.
Can I use UV resin for jewelry?
Yes — UV resin is ideal for small jewelry pieces under 10mm thick, curing in 2–5 minutes under a UV lamp. For thicker pieces over 10mm, use two-part epoxy resin — UV light cannot penetrate deep enough to cure the centre of thicker pieces, leaving it permanently soft.
How many jewelry pieces can I make with 100ml of resin?
With 100ml you can typically make approximately 15–20 pairs of small stud earrings (10mm), or 8 pairs of medium dangle earrings (30mm), or 6 medium pendants (40mm), or 3–4 large pendants (50mm). The exact count depends entirely on your mold dimensions — use the calculator above for a precise batch estimate.
What is the best resin for jewelry making?
For jewelry, use crystal-clear casting resin with low yellowing tendency. ArtResin, Let's Resin, and Dr Crafty are all well-suited — all use a 1:1 mixing ratio and produce good clarity. Avoid table top or coating formulas for jewelry molds; they are designed for flat surfaces and do not fill small cavity shapes well. For very small pieces, consider UV resin for faster production.
How do I prevent bubbles in resin jewelry?
Mix epoxy slowly and let it sit 5–10 minutes before pouring — bubbles rise naturally. Pass a heat gun or butane torch quickly over the poured surface within 5–10 minutes to pop surface bubbles. For completely bubble-free results in high-end pieces, use a pressure pot — it compresses remaining micro-bubbles to invisibility during the cure cycle.
Can I add glitter or dried flowers to resin jewelry?
Yes. Pour a base layer one-third full, wait 30–60 minutes until tacky, place dried flowers or glitter on the tacky surface, then fill with the remaining resin. This prevents floating or sinking. Seal dried flowers with Mod Podge before embedding — unsealed botanicals contain moisture that clouds resin permanently.