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Resin Volume Calculator

Calculate resin needed for SLA/DLP prints from model volume and support structures. Estimate resin cost and vat capacity for MSLA printing.

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Inputs that matter
Model Length (X), Model Width (Y), Model Height (Z), Support/Waste Factor
Output to expect
Resin Volume Calculator
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Model Volume from Mesh

STL/OBJ mesh volume in cm³ converts directly to ml of resin for the solid part. 1 cm³ = 1 ml.

Model resin (ml) = mesh volume (cm³)

Support Structure Allowance

Supports add 15–40% extra resin depending on orientation and support density. Heavy supports on overhangs increase consumption.

Support resin ≈ model volume × support factor (0.15–0.40)

Vat Minimum and Waste

MSLA vats need minimum resin depth (~2–3 mm) regardless of model size. Failed prints, purge, and resin stuck in vat add 5–10% waste.

Total resin = model + supports + vat minimum + waste allowance

Updated: July 2026

Example Scenarios

Six miniatures totaling 8 cm³ with 25% supports: 8 × 1.25 = 10 ml resin. Add 15 ml vat minimum for small MSLA printer = 25 ml total per batch.

120 ml model + 30 ml supports (25%) + 10 ml waste = 160 ml. Fits in 250 ml bottle with one print; plan resin level above model height in vat.

Ring model 0.8 cm³ with light supports (15%): ~0.92 ml per ring. Batch of 20 rings ≈ 18 ml plus vat minimum — efficient use of expensive castable resin.

Common Mistakes to Avoid

Calculating only model volume without supports

Most SLA prints need supports. Omitting 20–30% support allowance causes mid-print resin shortage and failed jobs.

Reusing resin contaminated with cured debris

Always filter vat resin through mesh strainer before reuse. Cured particles cause failed layers and LCD screen damage on MSLA printers.

FAQ

Light supports: 10–20%. Medium: 20–30%. Heavy supports on complex overhangs: 30–40%. Orient models to minimize support contact for resin savings.

Yes — resin in the vat is reusable after filtering cured particles through a paint strainer. Account for 5–10% loss to vat residue and failed prints.

Use slicer preview (Chitubox, Lychee, PrusaSlicer SLA) which reports resin volume including supports. This calculator estimates when pre-slice data is unavailable.

Most MSLA printers need 2–3 mm resin above the build plate at the model's tallest point. Small prints still require enough total volume to cover the vat floor.

Resin density is ~1.05–1.20 g/ml depending on formulation. Volume in ml is standard for resin bottles; weight differs slightly from water equivalence.

About Resin Volume Calculator

Resin printing consumes material for both the model and support structures. This calculator estimates total resin volume from mesh volume, support density, and vat dead volume for SLA, DLP, and MSLA printers.