Stop guessing. This formula works.
Price = Material Cost + Machine Cost + Labor + Profit
Weight of filament (g) × price per gram. PLA is about $25/kg = $0.025/g.
Printer cost ÷ expected lifespan (hours) × print time. ~$0.20-0.50/hour.
Post-processing time × your hourly rate. Don't forget this!
Add 30-50% on top. You're running a business, not a charity.
A 50g Benchy: $1.25 material + $0.40 machine + $2 labor = $3.65. Add 40% = $5.11. Round to $5.