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3D Print Material Costの包括的な教育ガイドを準備中です。ステップバイステップの解説、数式、実例、専門家のヒントをお届けしますので、もうしばらくお待ちください。
The 3D Print Material Cost Calculator computes the filament cost per model based on model weight in grams, spool price, spool weight (typically 1 kg), and waste percentage (5–15% accounts for purge towers, brims, supports, failed prints). Standard PLA averages $0.020–0.030 per gram ($20–30 per 1 kg spool); PETG $0.025–0.035; ABS/ASA $0.020–0.030; TPU $0.040–0.060; specialty materials (carbon fiber composites, metal-filled, glow-in-dark) $0.05–0.15 per gram. This calculator gives per-print material cost — essential for pricing custom orders, Etsy/Shopify listings, or comparing brand value. Get model weight from slicer estimate (Cura, PrusaSlicer, OrcaSlicer all show grams after slicing) or weigh the printed model on a kitchen scale post-print. Waste accumulates from: skirt/brim (1–3 g), purge tower for multi-color (10–30 g), supports (10–30% of model), failed prints (full waste of attempt), and color changes (purge per color). For solo prints with no supports, 5–10% waste is realistic; for complex multi-material prints with supports, 20–30%. For commercial use (Etsy shop, custom print services), material cost is typically 10–20% of total job cost. The other 80–90% covers: machine hour (depreciation + electricity $0.50–2.00/hr), labor (slicing, post-processing, packaging $5–30/hr), shipping, platform fees (Etsy 6.5% + payment processing), and profit margin (40–60% on hobby-level work, 100%+ on specialized engineering parts). Underpricing based on material cost alone is the most common first-year mistake for print-for-hire operators. For maker hobbyists: knowing material cost helps decide print-vs-buy. A 200g phone stand at $0.025/g costs $5 in filament — competitive with Amazon. A 500g organizer at $0.025/g costs $12.50 — often beats Amazon since the print is custom. Calculator helps make these tradeoffs explicit. For schools and libraries operating shared printers, charging $0.10–0.20 per gram covers material + wear + supervision and remains affordable for students.
- 1Step 1 — Get model weight from slicer estimate (slice the file first; Cura/PrusaSlicer report grams)
- 2Step 2 — Enter spool price (your actual purchase cost, not MSRP)
- 3Step 3 — Enter spool weight (typically 1000g; sometimes 750g for premium brands)
- 4Step 4 — Enter waste percentage (5% for simple prints, 15% for supports, 25%+ for multi-material)
- 5Step 5 — Calculator computes cost per gram: SP / SW
- 6Step 6 — Computes total filament used: W × (1 + Waste%)
- 7Step 7 — Outputs cost per gram, total grams used, and total material cost
100 × 1.10 × ($25/1000) = $2.75. Most hobby prints fall in this range.
Bigger prints amplify cost — and PETG is slightly more expensive than PLA. Add this to machine hour cost for accurate pricing.
TPU runs 2× PLA cost. Justifies higher pricing on flexible parts.
Premium materials warrant 2–3× pricing markup over PLA versions
Custom print pricing for Etsy/Shopify shops
Print farm cost accounting
School/library print fee calculation
Maker hobbyist print-vs-buy decision
Quote generation for commission work
Filament inventory budgeting
How does machine hour cost factor in?
Material is typically only 10–20% of total job cost for commercial work. Machine hour ($0.50–2.00/hr including depreciation + electricity + wear) often equals or exceeds material. A 10-hour print at $1/hr machine = $10 plus material. Add labor (slicing, post-processing, packaging) and platform fees on top. Set commercial pricing as Material × 5–10 to cover everything.
Does color affect filament cost?
Standard colors (white, black, gray) usually cheapest. Special effects (silk, glow, metallic, carbon-fiber) run 1.5–3× cost. Multi-color prints add waste from purge towers (10–30g per color change). Single-color prints are most economical; switch to multi-color only when the visual outcome justifies the cost.
What waste percentage should I use?
Simple model, no supports: 5%. Standard model with skirt/brim: 7–10%. Model with supports: 12–18%. Multi-material with purge tower: 25–40%. Always include failed prints in your real waste calculation — print farms report 10–15% failure rates costing full waste of attempted prints.
Are name-brand filaments worth the premium?
Sometimes. Premium brands (Polymaker, Prusament, Sunlu) cost 1.5–2× generic. Premium gives: tighter diameter tolerance (smoother surface), cleaner color, less moisture absorption, fewer failures from contaminants. For visible/aesthetic parts, premium pays back. For prototypes/functional parts where appearance doesn't matter, generic is fine — save $10–20 per spool.
How do I reduce filament waste?
Print without brim when bed adhesion is good. Reduce supports via model orientation. Use single-extrusion mode for multi-color (paint vs print colors). Tune retraction to minimize stringing. Calibrate first layer to avoid waste from re-prints. Most-experienced print operators run 5–8% waste; beginners often run 20%+ until tuned.
プロのヒント
For commercial pricing, set selling price at 5–10× material cost to cover machine time, labor, post-processing, packaging, and platform fees. Underpricing based on material alone is the #1 first-year mistake for print-for-hire operators — material is typically only 10–20% of total job cost.