Which resin is cheaper per finished model?

Compare the cost of a successful print

First convert each bottle to the same volume using its labelled size. Add delivery to the bottle price. Then use your slicer's resin volume and observed failure rate to estimate material cost per finished model. The cheapest delivered price per litre can lose its advantage if one resin repeatedly fails during your workflow.

Is 1 kg of resin the same as 1 litre?

No. Kilograms measure mass and litres measure volume. To convert, divide grams by the liquid resin density in g/mL. For example, at an illustrative density of 1.10 g/mL, a 1 kg bottle contains about 909 mL. Check the actual resin's technical or safety documentation rather than assuming every resin has this density. Do not use the weight of a cured model as a substitute for the slicer's liquid resin estimate.

What should count as model resin?

Use the slicer's total resin estimate for the plate, including supports and rafts. Divide by the number of usable models on that plate. This calculator estimates resin cost only; your true print cost also includes printer wear, electricity, consumables and labour. Read the full cost breakdown before setting a selling price.

How does the failure allowance work?

If one in ten comparable plates fails, successful plates need to carry the material cost of the failed ones. Divide the raw resin cost by the chance of success: at 10% failures, divide by 0.90. The estimate assumes failed attempts consume a similar amount of resin; partial failures may use less.