Resin Print Volume Calculator

Frequently Asked Questions

How much resin will my print use?

Resin mL = part volume + supports + drained-back tank loss + waste. A 40 mL part with 30% supports overhead and 5% waste needs ≈40 × 1.30 × 1.05 ≈ 55 mL of poured resin.

How heavy are supports usually?

Light supports add 10–20% volume, medium 25–35%, heavy/auto 40–60%. Manual support placement on hollowed models is the single biggest way to cut resin use.

Why hollow models?

A 60×60×60 mm solid cube is 216 mL of resin; hollowed to a 2 mm shell with drain holes it drops to ≈40 mL - over 80% savings - and cures more uniformly.

How much resin stays in the vat?

You generally pour 50–100% extra beyond the part volume to keep the build plate covered. Resin returned to the bottle through a filter is reusable, so the true consumed mL is part + supports + a small evaporation/cleanup loss.

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Estimates for informational purposes only.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.

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How This Calculator Works

Estimating resin needs for an MSLA / SLA print is different from FDM. The slicer reports the volume of resin that the part itself consumes, but the actual pour into the vat is usually larger: you must keep enough resin in the tank that the build plate stays submerged through every lift, you must add support material that gets cured and broken off, and a few percent inevitably ends up over-cured on the FEP, wiped onto the spatula, or drained between prints. This calculator takes the slicer's reported part volume, layers on a support allowance and a waste factor, and tells you (a) how much resin the print consumes, (b) the minimum amount you must pour into the tank for the print to succeed, and (c) the cost at your $/L resin price.

Formula / Method

Support volume = part volume × support % / 100. Waste volume = (part + supports) × waste % / 100. Resin consumed by the print = part + support + waste. Minimum tank pour = max(tank base fill, consumed) - the tank must always cover the LCD properly even if the part itself is tiny. Cost = (consumed mL ÷ 1000) × $/L. Typical resin density is 1.05–1.20 g/mL (close to water), but pricing and slicer estimates are volume-based, so this tool stays in mL. Most slicers (Lychee, Chitubox) report part volume in mL directly.

Worked Example

An MSLA print of a 35 mL miniature batch with 20% supports and 5% waste; tank base fill 150 mL; resin at $45/L. Support = 35 × 0.20 = 7.0 mL. Waste = (35 + 7) × 0.05 = 2.1 mL. Consumed = 35 + 7 + 2.1 = 44.1 mL. Tank base fill is 150 mL, which is more than the print needs - so you must pour at least 150 mL even though only 44.1 mL ends up in the model. Cost of consumed resin = 44.1 ÷ 1000 × $45 = $1.98. The leftover ~106 mL stays in the vat for the next print or returns to the bottle through a filter funnel. Now imagine a 400 mL large dragon: consumed becomes 400 + 80 + 24 = 504 mL, cost $22.68 - and you must keep at least 504 mL in the vat throughout, so you must start with a fresh full pour.

Common Mistakes

Pouring only the part volume - the LCD must stay covered even if the part is tiny; under-fill exposes the FEP to UV and damages it.

Forgetting supports - densely supported miniatures can have 30–50% support volume; sparsely supported large prints might be 10–15%.

Treating resin like filament - resin is a liquid, you cannot return precisely what is left; assume a few mL of evaporation and cleaning loss per print.

Mixing different resin batches in the tank without checking compatibility - some pigments and additives interfere with each other's cure profile.

Underestimating the volume of cured resin on supports - tree-style supports add only 10–15%, dense slabs much more.

Tips & FAQ

How much resin to pour for a fresh print? Vat-fill line on most printers is ~1/3 of tank volume = 150–250 mL for 6–8 inch printers, 300–500 mL for 10-inch. Always at least covers the LCD. Resin shelf life? Unopened: 12–24 months. In the vat: 1–2 weeks if covered from UV, indefinitely if reused. What about hollowing? Hollow models drastically reduce resin consumption (a hollow miniature can be 30–50% the volume of solid) but require drain holes - the slicer recalculates volume after hollowing. Cost vs FDM? Resin at $45/L = ~$45/kg equivalent for 1.05 g/mL resin - about 2× PLA. The detail premium justifies it for miniatures and jewellery. Wash and cure usage? IPA (or wash-station fluid) is a recurring cost; 1 L lasts roughly 20–40 prints before saturating. Storage and disposal: uncured resin is hazardous - cure waste under UV before binning, store in opaque containers, wear nitrile gloves. Why does my slicer say less than this estimate? Slicer reports the model only; the support, waste, and minimum pour are additional and this tool accounts for them. Plan with this figure, not the slicer's solo number.

Resin Print Volume Calculator

Frequently Asked Questions

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