Filament Usage Calculator
Filament Usage Reference — 1.75mm PLA
Estimates for common print sizes at 20% infill, 1.2mm walls.
| Print Size (mm) | Weight | Length | Cost ($25/kg) |
|---|---|---|---|
| 20 × 20 × 20 | ~5 g | ~2 m | $0.13 |
| 30 × 30 × 30 | ~12 g | ~5 m | $0.30 |
| 50 × 50 × 30 | ~28 g | ~11 m | $0.70 |
| 50 × 50 × 50 | ~38 g | ~15 m | $0.95 |
| 80 × 80 × 50 | ~72 g | ~29 m | $1.80 |
| 100 × 100 × 50 | ~100 g | ~40 m | $2.50 |
| 100 × 100 × 100 | ~170 g | ~68 m | $4.25 |
| 150 × 150 × 100 | ~340 g | ~137 m | $8.50 |
| 200 × 200 × 100 | ~560 g | ~226 m | $14.00 |
| 200 × 200 × 200 | ~1000 g | ~403 m | $25.00 |
How We Calculate This
This filament usage calculator uses established formulas and industry-standard data to provide accurate estimates.
- Enter your specific values into the calculator fields above
- Our algorithm applies the relevant formulas using your inputs
- Results are calculated instantly in your browser — nothing is sent to a server
- Review the detailed breakdown to understand how each factor affects your result
These calculations are estimates based on standard formulas. For critical decisions, always consult a qualified professional.
How to Convert Oven Recipes to Air Fryer
This calculator estimates filament usage based on the bounding box of your print, infill percentage, and wall thickness. It provides a reasonable approximation before slicing.
The basic rule:
- The outer shell volume is calculated from wall thickness around the perimeter
- The infill volume is the remaining interior space multiplied by infill percentage
- Total plastic volume is converted to filament weight using material density, and to length using filament diameter
For precise estimates, always check your slicer software. This calculator gives a quick ballpark to help you decide if you have enough filament on the spool before committing to a print.
When Would You Use This Calculator?
This filament usage calculator is designed for anyone who needs quick, reliable estimates without complex spreadsheets or professional consultations.
- When you need a quick estimate before committing to a purchase or project
- When comparing different options or scenarios side by side
- When planning a budget and need to understand potential costs
- When you want to verify a quote or estimate you've received from a professional
- When teaching or learning about the concepts behind these calculations
Frequently Asked Questions
How accurate is this filament calculator?
This provides a rough estimate based on a rectangular bounding box approximation. Actual usage depends on model geometry, support structures, skirts, and brims. Your slicer software (Cura, PrusaSlicer) gives precise estimates after slicing. This tool is best for quick checks.
What infill percentage should I use?
For decorative items, 10-15% infill is fine. For functional parts, 20-40% provides good strength. For structural or load-bearing parts, use 50-100%. Higher infill uses more filament and takes longer to print but produces stronger parts.
What is the difference between 1.75mm and 2.85mm filament?
These are the two standard filament diameters. 1.75mm is more common and used by most consumer printers. 2.85mm (sometimes labeled 3mm) is used by some brands like Ultimaker and LulzBot. The print results are similar; it's just a matter of what your printer accepts.
How much filament is on a standard spool?
A standard spool contains 1 kg of filament. For 1.75mm PLA, that's approximately 330 meters of filament. For 2.85mm PLA, it's about 120 meters per kg. Some brands sell 0.5 kg or 2 kg spools.
Which filament type uses the most material?
Denser filaments weigh more for the same volume. PETG (1.27 g/cm³) and PLA (1.24 g/cm³) are the densest common types. ABS (1.04 g/cm³) is lighter, so a 1 kg spool of ABS gives you more printed volume than 1 kg of PLA.
How does wall thickness affect filament usage?
Thicker walls use more filament but create stronger parts. Standard wall thickness is 1.2mm (3 perimeters at 0.4mm nozzle). For strong functional parts, use 2.0-2.4mm walls. Thin-wall vases and decorative prints might use just 0.4-0.8mm.