How Much Resin for Christmas Ornaments?

Short answer: a flat round ornament 3 in across and ¼ in thick holds about 1.8 in³ ≈ 1 fl oz (30 ml) of resin, so a set of 10 needs about 10 fl oz plus 10% for waste. Thin or small ornaments need far less. Enter your size and count below, or fill one mold cavity with water to measure it.

UV resin or epoxy for ornaments?

UV resin suits thin, small ornaments: cure in layers of a few mm under a lamp (UV cure times, choosing a lamp). Epoxy suits thicker or larger pieces and batches but needs its full demold time; see resin vs epoxy.

Ornament tips

1. Plan the timeline: demold time plus a day or two before hanging or gifting (cure time by temperature).
2. Add hanging loops after demolding with a small drill bit and screw eyes, or use molds with a built-in hole.
3. Dry flowers and photos completely and seal paper before casting.
4. Mica and glitter: keep colorants within the label's limit (pigment calculator).
5. Making several? See DIY resin gift ideas and print the free mixing ratio chart.

FAQ

How much resin do I need for an ornament?

A flat 3 in round ornament ¼ in thick takes about 30 ml (1 fl oz). Small or thin ornaments use much less; measure a cavity with water for odd shapes.

Can I use UV resin for ornaments?

Yes for thin pieces. Cure in thin layers under a lamp that matches the resin's wavelength; thicker pieces are easier with epoxy.

How long before resin ornaments can be hung?

Wait at least the demold time on the label and ideally the full cure before drilling, hanging or packaging them.

More tools: resin calculator · mix ratio by weight · cure time · mold volume · tabletop coating · pouring too thick