How do you calculate filament length from weight in grams?

Filament volume is mass divided by density (V = Mass / Density). The length is volume divided by the cross-sectional area of the filament cylinder: Length = Mass / (Density × π × (Diameter / 2)²). For 1.75mm PLA (density 1.24 g/cm³), 100 grams equals approximately 33.56 meters.

How many meters of filament are on a standard 1kg spool?

A standard 1kg (1000g) spool of 1.75mm PLA filament contains approximately 335 to 340 meters of filament. For lighter materials like ABS (density 1.04 g/cm³), a 1kg spool contains roughly 400 meters.

How much electricity does a 3D printer use during an 8-hour print?

A standard FDM 3D printer draws around 250W–300W during initial bed heating, and drops to an average of 100W–150W continuous load while printing PLA at 60°C bed temp. Over 8 hours, that is roughly 0.8 to 1.2 kWh (about $0.15 to $0.25 at average utility rates).

Why does PETG cost more per cubic centimeter than PLA even at the same price per kg?

PETG has a higher density (approx 1.27 g/cm³) than PLA (approx 1.24 g/cm³). Because 3D parts are defined by volume rather than mass, a model printed in PETG requires approximately 2.4% more weight than the identical model printed in PLA.

What failure rate or scrap allowance should I add to my pricing?

Professional 3D printing print farms typically incorporate a 10% to 15% scrap contingency rate into part pricing to cover bed adhesion failures, support material waste, purged filament towers, and nozzle flushes.

DIY & Trades

3D Print Filament Weight, Spool Usage & Electricity Cost Calculator

Name: 3D Print CAD Filament Weight, Spool & Electricity Cost Calculator
Author: AnshuTechy

Calculate material weight (grams), filament spool length (meters), volumetric material density, and kilowatt-hour electrical printing costs across PLA, PETG, ABS, TPU, and PC resin prints.Documentation & FAQs ↓

3D Print CAD Filament Weight, Spool & Electricity Cost Calculator — Interactive Console

Runs locally in your browser • Instant output

3D Print Slicer Material Weight & Job Cost Estimator

Calculate exact gram consumption, spool utilization, and machine electrical expense.

Model Size Presets

Model Volume (cm³)65 cm³

Infill Density (%)20%

Filament Material

Spool Price ($/kg)

Print Time (Hours)

Bed/Hotend Watts

Power ($/kWh)

Total Production Cost$0.80$0.20 per machine hour

Filament Used32.2g$0.71 material

Electricity$0.100.60 kWh energy

1kg Spool Yield31 prints / spool

One print consumes 3.2% of a standard 1,000g spool.

Step-by-Step Instructions

4 Steps to Completion

1Phase 1

Select your filament material type (PLA, PETG, ABS, TPU, or Nylon) and filament diameter (1.75mm or 2.85mm).

2Phase 2

Input the sliced print weight (grams) or length (meters) provided by your slicer software (Bambu Studio, Cura, PrusaSlicer).

3Phase 3

Enter your spool purchase price ($ per 1kg roll) and printing time duration (hours and minutes).

4Phase 4

Inspect the total material cost, printer electricity expense, total job cost, and cost per finished gram.

Practical Use Cases & Real-World Scenarios

Quoting Custom 3D Printing Client Jobs

Accurately compute material mass, electrical run time, machine wear, and markup margins to deliver profitable 3D printing service quotes.

Estimating Remaining Filament on a Spool

Determine whether you have enough filament remaining on an opened spool to finish a 350-gram print without running out.

Comparing PLA vs PETG vs Resin Cost

Analyze true print job cost differences between budget PLA, engineering PETG, and UV photopolymer resin.

Related Editorial Guide on AnshuTechy10 Best Free CAD Software You Must use in 2026

Read Tutorial →

Share With Your Community

Found this tool helpful? Share it with colleagues & friends:

100% free, private in-browser utility with zero server uploads.

3D Print Filament Weight, Spool Usage & Electricity Cost Calculator

3D Print Slicer Material Weight & Job Cost Estimator

Step-by-Step Instructions

Practical Use Cases & Real-World Scenarios

Polymer Density Presets

Spool Length & Mass Conversion

Electricity & Bed Heating Math

Markup & Failure Wear-and-Tear

Frequently Asked Questions

10 Best Free CAD Software You Must use in 2026

Found this tool helpful? Share it with colleagues & friends: