3D Printing Cost Calculator: What Does It Actually Cost?

The cost per part in 3D printing is more complex than “filament weight × filament price.” Here’s the real math.

The Simple Calculation (Material Only)

Bambu Studio and most slicers show you the estimated filament weight per print. Multiply by your per-gram filament cost:

Formula: Print weight (g) × filament cost per gram = material cost

Example: A 50g PLA print using $20/kg filament:

Cost per gram: $20 ÷ 1000g = $0.02/g
Material cost: 50g × $0.02 = $1.00

Common filament costs per gram:

Budget PLA: $0.015-0.018/g ($15-18/kg)
Quality PLA: $0.020-0.025/g ($20-25/kg)
PETG: $0.020-0.028/g ($20-28/kg)
ABS/ASA: $0.022-0.030/g ($22-30/kg)
Nylon: $0.035-0.060/g ($35-60/kg)
PC: $0.040-0.060/g ($40-60/kg)
Carbon fiber composites: $0.045-0.080/g ($45-80/kg)
TPU/Flex: $0.025-0.040/g ($25-40/kg)

The Real Calculation (Full Cost)

Material cost is typically only 30-50% of the true cost per part. Here’s everything:

1. Material: 30-50% of total cost

As calculated above. Don’t forget supports and brims — they add 10-30% more filament.

2. Electricity: 5-10%

A Bambu Lab printer draws 200-350W during printing.

Formula: Printer wattage × print hours × electricity rate

Example: X1C printing for 3 hours at 300W, $0.12/kWh:

0.3kW × 3hr × $0.12 = $0.11

Electricity is almost never significant. A 10-hour print costs about $0.35 in electricity.

3. Machine Depreciation: 15-25%

Your printer has a finite lifespan. Spread its cost over its useful output.

Conservative estimate: 5,000 print hours per machine.

Example for P1S ($599):

$599 ÷ 5,000 hours = $0.12/hour
3-hour print: $0.36 in depreciation

4. Consumables: 5-10%

Nozzles, build plates, PTFE tubes, lubricant — these are wear items.

Approximate annual consumable cost for active printer:

2 nozzles: $20
1 build plate: $30
PTFE tubes: $15
Miscellaneous: $15
Total: ~$80/year

Divide by annual print hours. At 2,000 hours/year: $0.04/hour.

5. Failed Prints: 10-20%

This is the hidden cost everyone ignores. Even with a reliable printer, some prints fail.

Realistic failure rates:

Well-tuned Bambu Lab on PLA: 3-5%
PETG/ABS: 5-10%
Nylon/PC: 10-15%
Experimental settings: 20%+

How to account for it: Add the failure rate percentage to your material cost. If you have a 5% failure rate, multiply material cost by 1.05.

6. Your Time: Variable (Often Biggest Cost)

Bed prep, file slicing, support removal, post-processing, quality inspection.

For personal projects, this is free. For client work, value your time at minimum $25-50/hour.

Example time per part (typical functional part):

Slicing and prep: 5-15 minutes
Post-processing: 5-30 minutes
At $30/hr: $5-22.50 in labor per part

Full Cost Example

Part: Functional drone mount, 75g PLA, 4 hours print time

Material: 75g × $0.022 = $1.65
Supports material: ~15g × $0.022 = $0.33
Electricity: 0.3kW × 4hr × $0.12 = $0.14
Depreciation: $0.12/hr × 4hr = $0.48
Consumables: $0.04/hr × 4hr = $0.16
Failure buffer (5%): $0.10
Total cost: $2.86

If selling, add labor (15 min post-processing at $30/hr = $7.50):

Total with labor: $10.36
Selling price (3× markup): $31
Profit: ~$21

How to Price Parts for Profit

The 3× Rule (Minimum)

Charge at least 3× your full cost (including labor). This accounts for overhead, marketplace fees, and the margin that makes the business viable.

The Value Rule (Better)

Price based on what the part is worth to the buyer, not what it costs you.

A custom bracket that costs $3 to print but replaces a $50 broken part? Charge $35-45. You’re saving them money and delivering faster than any alternative.

Marketplace Pricing

Etsy: Add 6.5% for fees + shipping costs
Local: Add 10% for delivery/pickup time
Volume clients: Offer 15-20% discount for orders >10 units

Cost Reduction Strategies

Reduce material waste:

Minimize supports with smart orientation
Use tree supports instead of normal (30-50% less material)
Right-size your infill (15% is fine for most parts, 100% is almost never needed)

Reduce failures:

Calibrate your printer properly
Use proven profiles for each material
Dry hygroscopic filaments before printing
Clean your build plate between prints

Buy filament in bulk: Most brands offer 3-packs or 5-packs at 15-25% discount. For production printing, this adds up fast.

Use the right printer for the job: Don’t run your X1C ($999) for simple PLA parts that an A1 Mini ($299) handles identically. Lower depreciation per hour.

Start your print business: How to Make Money 3D Printing, Print Farm Blueprint on Ko-fi.