Why every other resin cost calculator gets it wrong
Search "resin cost calculator" and you'll get a dozen tools that compute one thing: resin_grams × price_per_kg + a vague electricity guess. They consistently underestimate the real cost of a resin print by 30–50%.
Resin printing has more hidden costs than any other 3D printing technology. The bottle of grey resin you bought is the smallest line item in a year of printing. The real money goes to FEP films, LCD screens, alcohol, gloves, paper towels, and the cure unit pulling 60 watts every time you press the button. Most sellers don't realize this until they look back at six months of credit card statements and wonder why they're not actually making money.
This calculator counts every cost an honest accountant would count.
The five hidden costs
1. FEP / nFEP film wear
The clear (or milky) film at the bottom of your resin vat lasts 30–50 prints before it clouds, scratches, or punctures. A replacement sheet is $10–25 — under $1 per print on average, but it adds up fast. nFEP (non-stick) film lasts 80–100 prints but costs more. The calculator divides cost by your expected lifetime and adds the per-print figure to your true cost.
2. LCD masking screen depreciation
The LCD that masks the UV light has a documented lifetime of about 2,000 hours of UV exposure. Replacement: $70 for a Mars-size, $150 for a Saturn-size, $350 for a Mega-size, $380 for the pro Form 4. At 2,000 hours that's $0.04–$0.20 per print hour. A 6-hour print on a $150 Saturn LCD adds $0.45 to your cost — small but ignored by every basic calculator.
3. IPA bottle and cycle math
Most calculators use a flat "$0.50 per print" for IPA. Reality: you pour a gallon of 99% IPA (~$25) into your wash tank and use it for somewhere between 30 and 100 prints, depending on print size and how dirty it gets. With a hydrometer to monitor saturation, 60–80 prints is realistic. Per-print cost: $0.30–$0.80, varying with your habits. Our model lets you set both the bottle cost and the prints-per-bottle, so the math reflects your actual workflow.
4. Wash & cure unit power
After every print, you wash for 3–10 minutes and cure for 2–6 minutes in a separate machine. The Anycubic Wash & Cure 3.0 pulls about 50W during wash and 50–80W during cure. The Phrozen Cure Mega pulls 80W. Over hundreds of prints, that's real electricity nobody else's calculator counts. We separate it out so you can see what your post-processing actually costs.
5. PPE and consumables
Each print: one pair of nitrile gloves ($0.10), 2–3 paper towels ($0.05), and (every 5–10 prints) a fresh resin filter (~$0.03 amortized). Add a $0.05 contribution for replaceable scrapers, silicone cups, and other shop tools you bought once but use every print. Per print: $0.15–$0.30. Per year of 500 prints: $75–$150. Not negligible.
Water-washable resin: a real branch in the cost tree
Water-washable resins (Anycubic, Elegoo, Phrozen, etc.) eliminate IPA entirely — you rinse with plain tap water. They're slightly more brittle and a touch more expensive per kilogram, but the elimination of IPA usually saves $0.30–$0.80 per print plus the cost of the wash bin replacement. About 25% of hobby sellers now use water-washable resin for production. Most calculators don't model this at all. Toggle our radio button or pick a water-washable resin from the dropdown and IPA cost vanishes.
Bottle drainage — the 5% you'll never get out
Pour out a 1 kg resin bottle. The last 50 grams will not come out cleanly — they cling to the inside, the bottle threads, and the little measuring tray. Over a year of printing 50 bottles, that's 2.5 kg of paid-for resin you never used. We add this as a configurable percentage (default 5%, push to 10% if you don't scrape).
Failure rate by resin type
Standard greys: 5% failure on a tuned printer. Tough/ABS-like: 5%. Water-washable: 6% (slightly brittler supports). Flexible: 9% (supports are notoriously hard). Castable: 12% (very temperature-sensitive — leave it 4 hours below 22°C and you're rebuilding the wax matrix). The calculator auto-loads each resin's baseline; tune to your real-world numbers after 50 prints.
Calibration: the override that makes this calculator yours
Most numbers are sensible defaults. But your printer is unique:
- Your FEP might last 80 prints because you use a chamber heater and never get cracks
- Your LCD might already be at 1,200 hours because you ran it hard last year
- Your IPA might last 100 prints because you only print small detailed pieces
Override every value, save it (your browser remembers across visits), and you have a calculator calibrated to your shop, not a generic average.
Resin vs. FDM: which costs less?
For miniatures and detailed art, resin wins on quality but loses on cost — a 30g resin mini might run $4–$6 to produce vs $1.50 in FDM PLA. The premium is justified at retail (~$25 for a high-detail mini vs $8 for FDM equivalent) but only if your pricing reflects the true input cost. That's the whole point of running this calculator before you list a product — you find out, before customers do, whether your prices actually fund your business.
Workflow: what to do with the result
- Run a known SKU through the calculator. Note the total cost.
- Compare to what you currently charge on Etsy. If your sell price is less than 80% above true cost, you're not really making money — you're subsidizing customers.
- Adjust margin, switch platforms (Amazon Handmade may net more than Etsy on premium products), or batch-print to amortize labor.
- Export the breakdown as PDF for your records or as CSV to import into a spreadsheet of your full SKU lineup.
Frequently asked questions
What does this calculator include that other resin cost calculators miss?
Most online calculators only count resin × $/kg + electricity. We add: FEP film wear (~$0.30/print), LCD masking screen wear by hour, IPA reuse cycles (most calculators flat-rate IPA), wash & cure unit power (a separate machine that pulls 50–80W during every wash/cure cycle), per-print PPE (gloves, paper towels, filter), bottle drainage waste (5–10% you can never extract), and resin-type-specific failure rates (castable fails 3× more than standard). Total cost differences vs simpler calculators: typically 20–40% higher and more accurate.
How accurate are the LCD lifetime defaults?
For monochrome LCDs (every modern resin printer), 1,500–2,000 hours is the documented industry baseline. We use 2,000h for most printers, 5,000h for Formlabs Form 4 (which Formlabs publishes). For laser-based printers (Form 3+) the LCD field is N/A — the resin tank with FEP-equivalent film is the wear part, with much longer life. Override your printer's value if you have actual replacement data.
Why does water-washable resin show $0 IPA cost?
Because that's how water-washable resin works — you rinse the print under tap water (or in a bucket) instead of using isopropyl alcohol. Most calculators assume IPA always applies, which overstates costs for the ~25% of resin sellers who run water-washable lines. Toggle the radio button or pick a water-washable resin and the IPA line drops to zero automatically.
How does the IPA reuse model work?
You pour ~3.785 L (1 US gallon) of 99% IPA into your wash tank, costing about $25. You don't replace it after every print — most sellers monitor saturation with a hydrometer and replace when it goes cloudy or stops cleaning effectively, typically after 50–100 prints. Our model is `bottle_cost ÷ prints_per_bottle = $/print`. Adjust the cycles input to match your actual replacement frequency.
Why are wash and cure power separated from the printer?
Because they're a separate machine that runs after every print. An Anycubic Wash & Cure pulls about 50W during a 5-minute wash (resin-stirring motor + UV later) and 30–80W during cure (UV LED array). For a power user printing 100 prints/month, that adds up to several dollars in electricity that no other calculator counts.
Is the failure rate baseline by resin type real?
Yes — based on community data and our own production runs. Standard grey ~5%. ABS-like and tough ~5%. High-detail ~4%. Water-washable ~6% (slightly more brittle). Flexible ~9% (supports are tricky). Castable wax ~12% (very temperature-sensitive). These are starting points; tune to your actual numbers after 50 prints.
What about the "bottle drainage waste" line?
When you finish a 1L resin bottle, you can't pour out the last 5–10% — it sticks to the walls and pour spout. Over a year that's significant. Default of 5% is conservative; bump to 10% if you're pouring carefully and not scraping. Set to 0% if you transfer with a syringe.
Can I use this for high-end resin like Formlabs or BASF?
Yes. Formlabs Form 4 is in the printer dropdown with their published spec data. For BASF/Henkel/professional resins, pick "Custom" and enter your actual price-per-kg, density (usually printed on the spec sheet), and if applicable adjust the LCD lifetime upward — pro printers often spec 5,000+ hours.
Should I use the Etsy fees for selling minis?
Yes — Etsy is the dominant channel for 3D-printed miniatures. Our 2026 fee schedule includes the $0.20 listing + 6.5% txn + 3% + $0.25 processing. If you're over $10K/yr, off-site ads add another 12% on triggered sales. The platform dropdown also includes eBay, Amazon Handmade, Shopify, and direct sale.