3D Printing Weight (Small-Scale) Calculator Examples
Worked examples showing estimated filament weight, length, and material cost for small 3D prints.
These examples show how model volume, infill, shell coverage, material density, and filament diameter affect a small print estimate. They are planning examples; final slicer estimates can differ because they use the actual toolpath.
Small PLA cable clip with light infill
Estimate material for a 12 cm³ PLA cable clip printed at 15% infill with a 25% shell and solid-layer share.
Input Summary
Solid model volume
12 cm³
Infill
15%
Shell and solid-layer share
25%
Density
1.24 g/cm³
Filament diameter
1.75 mm
Filament cost
$20.00/kg
Calculation Breakdown
- 1Effective fill fraction0.25 + ((1 - 0.25) × 0.15)0.3625
- 2Material volume12 × 0.36254.35 cm³
- 3Print weight4.35 × 1.245.39 g
- 4Filament length4.35 / 2.4051.81 m
- 5Material cost(5.39 / 1000) × 20.00$0.11
Result Summary
Material cost
$0.11
3D Printing Weight (Small-Scale) Calculator
The cable clip is estimated to use 5.4 g of PLA, or about 1.8 m of 1.75 mm filament, costing approximately $0.11.
Medium PLA storage tray with standard infill
Estimate material for a 50 cm³ PLA tray at 20% infill and a 15% shell and solid-layer share.
Input Summary
Solid model volume
50 cm³
Infill
20%
Shell and solid-layer share
15%
Density
1.24 g/cm³
Filament diameter
1.75 mm
Filament cost
$20.00/kg
Calculation Breakdown
- 1Effective fill fraction0.15 + ((1 - 0.15) × 0.20)0.32
- 2Material volume50 × 0.3216.0 cm³
- 3Print weight16.0 × 1.2419.84 g
- 4Filament length16.0 / 2.4056.65 m
- 5Material cost(19.84 / 1000) × 20.00$0.40
Result Summary
Material cost
$0.40
3D Printing Weight (Small-Scale) Calculator
The tray is estimated to use 19.8 g of PLA, about 6.7 m of filament, and roughly $0.40 in material.
Dense PETG mounting bracket
Estimate material for an 80 cm³ PETG bracket at 45% infill with a 30% shell and solid-layer share.
Input Summary
Solid model volume
80 cm³
Infill
45%
Shell and solid-layer share
30%
Density
1.27 g/cm³
Filament diameter
1.75 mm
Filament cost
$25.00/kg
Calculation Breakdown
- 1Effective fill fraction0.30 + ((1 - 0.30) × 0.45)0.615
- 2Material volume80 × 0.61549.2 cm³
- 3Print weight49.2 × 1.2762.48 g
- 4Filament length49.2 / 2.40520.46 m
- 5Material cost(62.48 / 1000) × 25.00$1.56
Result Summary
Material cost
$1.56
3D Printing Weight (Small-Scale) Calculator
The PETG bracket is estimated to use 62.5 g of filament, about 20.5 m of 1.75 mm filament, and approximately $1.56 in material.
2.85 mm ABS enclosure cover
Estimate material for a 35 cm³ ABS cover at 10% infill and a 35% shell and solid-layer share, using 2.85 mm filament.
Input Summary
Solid model volume
35 cm³
Infill
10%
Shell and solid-layer share
35%
Density
1.04 g/cm³
Filament diameter
2.85 mm
Filament cost
$22.00/kg
Calculation Breakdown
- 1Effective fill fraction0.35 + ((1 - 0.35) × 0.10)0.415
- 2Material volume35 × 0.41514.53 cm³
- 3Print weight14.53 × 1.0415.11 g
- 4Filament length14.53 / 6.3792.28 m
- 5Material cost(15.11 / 1000) × 22.00$0.33
Result Summary
Material cost
$0.33
3D Printing Weight (Small-Scale) Calculator
The enclosure cover is estimated to use 15.1 g of ABS, about 2.3 m of 2.85 mm filament, and around $0.33 in material.
How to Read Your Results
Estimated material volume is the calculated volume of plastic in the finished model, not its fully solid volume.
Estimated print weight is useful for rough spool usage and material planning, but does not include extra printed features unless added separately.
Estimated filament length helps show whether the remaining material on a spool is likely sufficient.
Material cost reflects only the entered price per kilogram and the estimated filament mass.
Compare the result with your slicer's final filament estimate before starting an important or long print.
Assumptions & Important Notes
- Each model volume is the volume of the completely solid part, measured in cm³.
- Shell and solid-layer share is a simplified estimate rather than a direct toolpath measurement.
- No supports, brims, rafts, purge towers, or failed-print waste are included.
- Costs use the stated example spool prices and are shown as filament-only amounts.
Related Examples
Frequently Asked Questions
Can I use these examples for resin printing?
No. These examples are designed for filament-based printing, where diameter and material density are used to estimate filament length and weight.
Why does the small cable clip have a relatively high fill fraction?
Small parts often have walls and solid layers that occupy a large portion of their total volume, even when the internal infill setting is low.
Does switching from 1.75 mm to 2.85 mm filament reduce print weight?
No. For the same plastic volume and density, estimated weight is unchanged. The wider filament simply requires fewer metres.
Should I add support material to these estimates?
Add a separate allowance for expected supports and other extras, or rely on the slicer estimate after those features are configured.
Ready to calculate your own result?
Use the live calculator with your own inputs, timing, and preferences.