3D Printing Volume Calculator Examples
Explore worked 3D print volume and filament-weight estimates for rectangular models with different sizes, infill levels, and materials.
These examples use a simple rectangular bounding-box method: multiply length, width, and height, convert the result to millilitres, apply infill, then multiply by density. They are planning examples rather than slicer-based material predictions.
Small PLA electronics enclosure
A maker is planning a 80 mm by 50 mm by 25 mm PLA enclosure at 20% infill.
Input Summary
Length
80 mm
Width
50 mm
Height
25 mm
Infill
20%
Density
1.24 g/cm³
Calculation Breakdown
- 1Bounding-box volume80 × 50 × 25100,000 mm³
- 2Convert volume100,000 ÷ 1,000100 mL
- 3Estimated material volume100 × 0.2020 mL
- 4Estimated filament weight20 × 1.2424.8 g
Result Summary
Estimated filament weight
24.8 g
3D Printing Volume Calculator
The bounding-box volume is 100 mL, with an estimated 20 mL of material and 24.8 g of PLA.
Medium PETG workshop organizer
A rectangular organizer is 160 mm by 100 mm by 40 mm and is planned in PETG at 15% infill.
Input Summary
Length
160 mm
Width
100 mm
Height
40 mm
Infill
15%
Density
1.27 g/cm³
Calculation Breakdown
- 1Bounding-box volume160 × 100 × 40640,000 mm³
- 2Convert volume640,000 ÷ 1,000640 mL
- 3Estimated material volume640 × 0.1596 mL
- 4Estimated filament weight96 × 1.27121.92 g
Result Summary
Estimated filament weight
121.92 g
3D Printing Volume Calculator
The organizer has a 640 mL bounding-box volume and a simple estimate of 96 mL or about 121.9 g of PETG.
Large low-infill PLA display form
A display form measures 250 mm by 150 mm by 100 mm and uses 10% infill.
Input Summary
Length
250 mm
Width
150 mm
Height
100 mm
Infill
10%
Density
1.24 g/cm³
Calculation Breakdown
- 1Bounding-box volume250 × 150 × 1003,750,000 mm³
- 2Convert volume3,750,000 ÷ 1,0003,750 mL
- 3Estimated material volume3,750 × 0.10375 mL
- 4Estimated filament weight375 × 1.24465 g
Result Summary
Estimated filament weight
465 g
3D Printing Volume Calculator
The large form has a 3,750 mL bounding-box volume, with a basic estimate of 375 mL and 465 g of PLA.
High-infill ABS functional block
A functional block is 100 mm by 60 mm by 40 mm with 60% infill and ABS density of 1.04 g/cm³.
Input Summary
Length
100 mm
Width
60 mm
Height
40 mm
Infill
60%
Density
1.04 g/cm³
Calculation Breakdown
- 1Bounding-box volume100 × 60 × 40240,000 mm³
- 2Convert volume240,000 ÷ 1,000240 mL
- 3Estimated material volume240 × 0.60144 mL
- 4Estimated filament weight144 × 1.04149.76 g
Result Summary
Estimated filament weight
149.76 g
3D Printing Volume Calculator
The functional block has a 240 mL bounding-box volume and an estimated material weight of about 149.8 g of ABS.
How to Read Your Results
Bounding-box volume describes the full rectangular space occupied by the entered outside dimensions, not necessarily the model's true volume.
Estimated material volume applies the selected infill percentage directly to that rectangular volume.
Estimated filament weight converts the estimated material volume into grams using the selected density.
Use the values to compare rough design options or check whether sufficient filament is available.
Treat a slicer's material estimate as the final planning figure because it accounts for geometry and toolpaths.
Assumptions & Important Notes
- All dimensions are entered in millimetres.
- The model is approximated as a rectangular solid.
- Infill is used as a direct proportion of bounding-box volume.
- The specified density matches the filament material.
Related Examples
Frequently Asked Questions
Can I use these examples for a non-rectangular model?
They can provide a rough upper-envelope estimate, but irregular models may have much less true volume than their bounding boxes.
Why might an enclosure use more than the calculated estimate?
Enclosures commonly need walls, floors, lids, and top layers that are not represented by an infill-only estimate.
Does a lower-density filament always use less length?
This calculator estimates mass from volume and density. Filament length also depends on the filament's diameter and is not calculated here.
Can I estimate PETG and ABS with the same dimensions?
Yes. Use the same volume inputs and replace the density with the value for the selected material.
Ready to calculate your own result?
Use the live calculator with your own inputs, timing, and preferences.