How to use (3 steps)
- Choose Metric or US units, then set resin density and waste allowance.
- Pick a mode: surface (area × thickness), rectangular, cylinder, or known volume. Enter the dimensions.
- Hit Calculate, review volume & weight, and copy the URL to share the same setup.
A practical sample is loaded so results appear immediately.
Settings
Optional. Many epoxies are around 1.05–1.20 g/mL.
0–30%. Adds a margin for mixing loss and left-over material.
Optional. Limit volume per pour to plan multiple mixes.
Use wet film thickness; dry film will be thinner.
0–100%. Subtract wood/objects occupying the mold.
0–100%. Subtract wood/objects occupying the mold.
Use this if the cavity volume is already measured.
Results
Values auto-update as you edit.
Keep batches small to control heat; scrape cup walls when mixing.
Related calculators
FAQ
How much waste margin should I add?
5–15% is common. Rough surfaces, fillers, or colored pours may need closer to 20–30% while flat coatings can use less.
What density should I use?
Check the product data sheet. If you do not know it, try 1.10 g/mL. Set density to 0 to skip weight outputs.
Should I split into multiple batches?
Large batches can overheat. Keep each mix below your safe cup size or pot life. Use the max per batch field to split the total.