3D Printing Weight Calculator Examples
Worked examples showing how model volume, infill, shells, supports, density, and waste allowance affect estimated 3D print weight.
These examples use the same volume-to-weight approach as the calculator. They illustrate a small PLA part, a supported PETG print, and a hollow resin model with different material and support assumptions.
Small PLA organizer with low infill
A maker wants to estimate material before printing a small 60 cm³ organizer in PLA.
Input Summary
Model volume
60 cm³
Infill
15%
Shell allowance
18%
Support volume
0 cm³
PLA density
1.24 g/cm³
Extra material allowance
5%
Calculation Breakdown
- 1Model material fraction0.18 + ((1 - 0.18) × 0.15)0.303 or 30.3%
- 2Model material volume60 × 0.30318.18 cm³
- 3Finished print weight18.18 × 1.2422.54 g
- 4Total material required22.54 × 1.0523.67 g
Result Summary
Total material required
23.67 g
3D Printing Weight Calculator
Estimated total material requirement: 23.7 g of PLA.
Supported PETG functional bracket
A functional 150 cm³ PETG bracket uses a stronger infill setting and sparse supports.
Input Summary
Model volume
150 cm³
Infill
35%
Shell allowance
20%
Support volume
30 cm³
Support infill
20%
PETG density
1.27 g/cm³
Extra material allowance
8%
Calculation Breakdown
- 1Model material fraction0.20 + ((1 - 0.20) × 0.35)0.48 or 48%
- 2Model material volume150 × 0.4872.00 cm³
- 3Effective support volume30 × 0.206.00 cm³
- 4Finished print weight(72.00 + 6.00) × 1.2799.06 g
- 5Total material required99.06 × 1.08106.98 g
Result Summary
Total material required
106.98 g
3D Printing Weight Calculator
Estimated total material requirement: 107.0 g of PETG.
Hollow resin display model with supports
A resin print has been hollowed in software, leaving 85 cm³ of effective model material volume and supported on a light structure.
Input Summary
Model volume
85 cm³
Infill
100%
Shell allowance
0%
Support volume
20 cm³
Support infill
35%
Resin density
1.10 g/cm³
Extra material allowance
10%
Calculation Breakdown
- 1Model material fraction0 + ((1 - 0) × 1.00)1.00 or 100%
- 2Model material volume85 × 1.0085.00 cm³
- 3Effective support volume20 × 0.357.00 cm³
- 4Finished print weight(85.00 + 7.00) × 1.10101.20 g
- 5Total material required101.20 × 1.10111.32 g
Result Summary
Total material required
111.32 g
3D Printing Weight Calculator
Estimated total material requirement: 111.3 g of resin.
How to Read Your Results
Estimated finished print weight is the model and support weight before the extra-material allowance.
Estimated total material weight includes the buffer selected for purge, setup, and uncertain losses.
Model material volume is useful for comparing how infill and shell settings affect a design before choosing a material.
A result close to the remaining material on a spool or bottle should be treated cautiously because actual slicer use can vary.
Use a slicer's own material estimate when available, especially for expensive, multi-material, or support-heavy prints.
Assumptions & Important Notes
- Each model volume is expressed in cubic centimetres and represents either a fully solid model or a deliberately entered effective material volume.
- Shell allowance is a simplified percentage rather than a direct calculation from wall count and layer settings.
- Support volume and support infill are estimated independently of the main model.
- The selected density represents the actual material used for the print.
Related Examples
Frequently Asked Questions
How much PLA does a 100 cm³ print use?
It depends on shell and infill settings. At 20% infill with a 15% shell allowance, a 100 cm³ PLA model at 1.24 g/cm³ is estimated at about 41.7 g including a 5% allowance and no supports.
How do I estimate weight for a hollow 3D print?
Enter the effective material volume after hollowing if your software provides it, then use 100% infill and 0% shell allowance to avoid reducing that volume again.
Should a brim be included as support volume?
Yes. Add a reasonable estimated volume for a brim, raft, purge structure, or other printed extra if it is not already included elsewhere.
Why can two prints with the same model volume weigh differently?
They can have different infill, wall thickness, top and bottom layers, support use, material density, and waste requirements.
Ready to calculate your own result?
Use the live calculator with your own inputs, timing, and preferences.