Estimate resin for silicone molds, casting molds, trays, blocks, and simple mold cavities with waste and cost guidance.
Resin Tray Calculator
Trays can behave like shallow molds or like coated surfaces. This page uses surface-style inputs so decorative tray makers can plan thickness, edges, and runoff without using a floor or river table tool.
Enter your measurements
Example inputs
Default dimensions, allowances and prices are example inputs. Replace them with your measurements and product label. Leave unknown product limits blank.
Tray resin estimate
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Start with the inputs to generate an order-ready estimate.
- Raw volume
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- Conservative
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- Projected cost
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- Part A / Part B
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- Layer guidance
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- Kits to buy
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- Standard
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- Product fit
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Why This Estimate Changed
What moved the number
- Enter the form values to see raw volume, buffer, and recommendation.
Next Step
Match the result to the right resin class
Use the estimate to narrow the resin class first. Then confirm product limits, cure behavior, and measurement assumptions before you make a buying decision.
Measurement diagram
Decide whether you are filling a tray mold or coating a tray
A rectangular 12 × 18 in surface covered by 1/8 in of resin has a theoretical volume of 27 in³ = 442.45 mL. A tray casting with raised walls is a different cavity. Its outside length × width × height overestimates the resin where the tray has an empty center. Use a supplier's mixed capacity or a compatible measured cavity value for such molds; use the surface coating tool when applying a thin layer to an existing tray.
Product data before mixing
Use the exact product documentation for mixing basis, maximum layer depth, mixed batch volume and cure or recoat conditions. A dimensional estimate and a purchase allowance do not supply those material limits.
What this calculator covers
- Use inside dimensions or a known mixed volume per cavity.
- Count identical molds or sets and add a stated loss allowance.
- Small batches show mL; product limits and complete kit yield stay separate.
How to measure or set the inputs
- Choose inside geometry for a regular shape, or use a known cavity capacity where that mode is available.
- Set the number of identical pieces; the main quantity is the total batch, with a separate loss allowance.
- Check the raw quantity against a hand calculation or a product's published mixed capacity.
- Enter product ratio, limits and total kit mixed yield only when confirmed; purchase quantity is not a batch-mixing instruction.
Common mistakes that cost money
- Treating a shallow tray as a deep pour.
- Ignoring rim height or uneven tray bottoms.
- Forgetting that pigments and split designs create extra cup loss.
Project checklist before you buy
- Confirm the mold or surface is sealed before mixing resin.
- Measure depth twice at the deepest point of the project.
- Add extra material for waste, seepage, and edge soak-in.
- Confirm the resin type matches the intended pour depth.
- Prepare cups, stir sticks, gloves, and a level work surface.
FAQ
Questions people ask before buying epoxy
How do I account for inserts or hollow parts?
Dimension mode estimates a full regular shape. Use a known net cavity capacity or a separately measured displacement when inserts or hollow parts change that volume.
Should I fill any mold with water to measure capacity?
No universal measuring liquid is suitable for every material. Use a supplier's mixed capacity or a method compatible with the mold, substrate and resin, including its cleaning and drying requirements.
Does the result include the number of molds?
Yes. Enter capacity for one cavity or one complete set, then count identical units. The result already includes that count and the selected loss allowance.
Related Pages
Related calculators and guides
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Calculate a selling price per resin piece including material, supplies, labor, packaging, expected failures, selling fees and a profit margin.
Enter square feet (or m²) and coat thickness to see how many gallons of epoxy you need, with edge runoff, waste, and cost for tabletops, bar tops, and countertops.
Estimate epoxy project cost from planned resin quantity, waste, and price input for river tables, deep pours, coatings, and other resin projects.
Reviewed · Calculation notes and corrections