Resin 3D Printing Calculators — SLA & MSLA Cost

How resin 3D printing works — and why the economics differ from FDM

Resin 3D printing (SLA, MSLA, DLP) cures liquid photopolymer resin layer by layer using ultraviolet light. Unlike FDM where a solid filament strand is melted and deposited, resin printing starts with a vat of liquid and ends with a solid part. This fundamental difference creates entirely different economics, workflow and cost structure.

Resin vs. FDM: a cost and capability comparison

Material cost: Standard photopolymer resin typically costs $15–35/L. Standard PLA filament costs about $20–28/kg. In terms of volume of material, 1 litre of resin (1000 ml) vs. 1 litre of filament volume (1000 cm³ at $22/kg PLA: 1000 cm³ × 1.24 g/cm³ = 1240 g ≈ $27.28) — resin is similar or slightly cheaper per unit volume for basic materials, but significantly more expensive for specialty resins.

Electricity cost: Resin printers draw 40–90 W vs. 100–300 W for FDM. A 2.5-hour resin print at 60 W costs about $0.02 in electricity. A 3.5-hour FDM print at 150 W costs about $0.08. Resin wins on electricity, but it's a small fraction of total cost in either case.

Post-processing cost: FDM parts often just need support removal. Resin parts need: (1) IPA or cleaning solution wash (isopropyl alcohol, $10–15/L, ~50–100 ml per print session), (2) UV curing (5–15 minutes in a UV station or sunlight), and (3) support removal (more delicate — resin supports are finer but the material is more brittle and chips easily). These additional steps add time and consumable cost that FDM doesn't have.

Safety cost: Uncured resin is a skin sensitizer and requires gloves, ventilation and safe disposal. FDM is generally more beginner-friendly in terms of safety requirements.

Print quality: Resin wins decisively for fine detail and surface finish. 0.035 mm XY resolution vs. 0.1–0.4 mm for FDM. Layer lines are typically 0.025–0.05 mm for resin vs. 0.05–0.3 mm for FDM. For miniatures (28mm scale), jewelry, dental models, and cosplay props, resin's quality advantage is decisive.

Types of resin and their costs

The resin cost calculator works with any resin — but which resin you use dramatically changes the economics:

Standard photopolymer resin ($15–25/L): The entry-level option from brands like Elegoo, Anycubic, Phrozen. Good surface quality, brittle when cured. Suitable for miniatures, figurines, display models. Not suitable for functional parts that need to flex or survive impact.

ABS-like / tough resin ($25–40/L): More impact-resistant and less brittle than standard resin. Better for functional prototypes, mechanical components with light stress, snap-fit designs. Still significantly more brittle than FDM PETG or ABS for comparable applications.

Flexible / elastic resin ($40–80/L): Allows significant flex without breaking. Used for gaskets, seals, wearable devices, soft models. Shore hardness varies from about 40A (very soft) to 70A (moderately firm).

Water-washable resin ($20–32/L): Cleans with water instead of IPA. Reduces consumable cost and simplifies the workflow. Slightly more expensive per litre than standard resin, but eliminates IPA cost and safety concerns. Increasingly popular for beginners and studios without good IPA disposal options.

Castable wax resin ($60–120/L): Designed for lost-wax casting in jewelry making. Burns out completely without ash at investment casting temperatures. Used by jewelers to create custom rings, pendants and complex metal castings. The resin itself is just the medium — the value is in the metal casting it enables.

Dental-grade resin ($80–250/L): Biocompatible resins certified for dental applications: model resins for aligner production, surgical guide resins, splint resins, provisional crown resins. High accuracy and certified material properties. Requires validated printers and calibrated workflows.

Engineering resins (high-temp, ceramic-filled) ($100–500+/L): For industrial applications requiring specific material properties: heat resistance up to 200°C+ (compared to ~60°C for standard resin), ceramic additives for stiffness, etc. Used by professional studios and engineering firms for tooling and end-use parts.

The hidden costs of resin printing

The Resin Cost Calculator gives you the core material + electricity cost. For accurate total cost, add:

IPA or cleaning solution: Standard wash uses 200–400 ml of IPA per session. IPA at $12/L: $0.24–$0.48 per session. If you print once per session, that's $0.24–$0.48 per print. With a multi-stage wash (rinse + clean), costs double. Switching to water-washable resin eliminates this cost entirely at the expense of ~$5–8/L higher resin price — which often saves money for low-volume printers.

FEP/nFEP film: The transparent film at the bottom of the vat is a consumable. It lasts 100–400 prints depending on model complexity, UV exposure settings and resin type. Replacement cost: $8–25 per sheet. Per-print cost: $0.02–$0.25 depending on longevity. nFEP (improved version) lasts significantly longer. Some printers use ACF film which lasts thousands of prints.

Nitrile gloves: 2 gloves per print session, at $0.10–0.20/pair. A box of 100 gloves costs $8–15. Monthly use for an active hobbyist: $2–5 in gloves.

Failed prints: Resin print failures are more expensive than FDM failures because: the resin is harder to reuse (partially-cured particles contaminate the vat), cleaning up a FEP failure is time-consuming, and failures often contaminate the vat requiring a full clean and filter. Beginner failure rates for complex models can be 15–25%. Add a proportional buffer to your cost estimates.

Where to find resin volume used per print

All major resin slicers show estimated resin volume in ml after slicing:

Chitubox Basic / Pro: Click "Slice" then check the bottom summary bar — shows print time and resin volume in ml.
Lychee Slicer: After slicing, the print info panel on the right shows resin consumption in ml and print time.
Anycubic Photon Workshop: The slice summary shows volume in ml and time.
Elegoo's built-in slicer: Shows resin volume in the print summary.
UVtools (analysis software): Can analyze existing sliced files and report resin volume independently of the original slicer.

Note: the slicer's volume estimate includes supports but not the resin that remains in the vat between prints — this returns to the bottle and is reused, so it's not a sunk cost per print.

Choosing between LCD/MSLA and SLA (laser) resin printers

Most consumer resin printers are MSLA (Masked Stereolithography Apparatus) — they use a monochrome LCD screen to mask a UV LED array layer by layer. This is simpler, cheaper and increasingly capable. High-end professional printers use SLA (laser scanning) or DLP (digital light processing with a projector).

For cost purposes, MSLA (the Elegoo Mars/Saturn, Anycubic Photon, Phrozen Sonic line) is the relevant comparison for most users. Power draw: 40–90 W. Resolution: 0.035–0.05 mm XY. Build volume: up to 330 × 185 × 400 mm for large-format (Saturn 4 Ultra). Resin compatibility: all standard 405 nm resins.