Short answer: choose a scale whose capacity is above your biggest batch plus the cup, and whose readability (smallest step) is small enough for your smallest part. Scale maker American Weigh Scales suggests about 2–5 kg × 0.1 g as a main scale for general resin crafting, plus a 100–500 g × 0.01 g scale for pigments and tiny additives.
| Project | Suggested capacity | Suggested readability |
|---|---|---|
| Pigments, mica, tiny additives | 100–500 g | 0.01 g |
| Resin jewelry | 500 g–1 kg | 0.1 g |
| Coasters, tumblers | 1–2 kg | 0.1 g |
| Small and medium molds | 2–3 kg | 0.1 g |
| General resin crafting | 2–5 kg | 0.1 g |
| Larger molds, tabletop batches | 5 kg+ | 0.1–1 g |
Source: AWS: how to choose a scale for resin. AWS notes these are scale-selection guidelines, not mixing instructions, and that readability (the smallest displayed step) is not the same as guaranteed accuracy. Example model: the AWS-501 pocket scale is listed at 500 g × 0.1 g with a 2.5 × 3.0 in platform and 2 × AAA batteries. No prices are listed here because they change.
Only weigh if your resin's label gives a weight ratio; a 1:1 volume ratio is usually not 1:1 by weight. Convert with the weight converter or epoxy ratio by weight. Tare the cup first, pour part A, tare again, then pour part B. Size the batch with the resin calculator or mold volume calculator.
Capacity above your biggest batch plus the cup, and 0.1 g readability for most projects. Add a 0.01 g scale for pigments and amounts under 1 g.
Only for very small amounts. For normal batches, 0.1 g is enough, and 0.01 g scales usually have low capacity.
Yes, if it reads in 0.1 g or 1 g steps small enough for your batch and has the capacity. Cover it to protect it from drips.
More tools: resin calculator · mix ratio by weight · cure time · mold volume · tabletop coating · pouring too thick
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