3D Printing Fertiliser (Small-Scale) Calculator
Estimate the polymer, fertiliser additive and active nutrient mass needed for a small-scale fertiliser-loaded 3D print.
Overview
Use this small-scale 3D printing fertiliser calculator to estimate the mass of polymer and fertiliser additive needed for a printable blend. Enter the model’s solid volume, infill, allowance for shells, blend density, fertiliser loading and expected waste to plan a trial batch.
How it works
The calculator first estimates the portion of the model that will contain material by adding the infill setting to a shell and top-layer allowance. It multiplies that estimated printed volume by the blend density to find the finished part mass. A waste allowance is then added. The total blend mass is split into base polymer and fertiliser according to the fertiliser loading percentage. Active nutrient mass is the fertiliser mass multiplied by the nutrient percentage entered.
How to use this calculator
- 1Enter the volume of the model if it were completely solid.
- 2Add the infill percentage from your slicer settings.
- 3Estimate the extra material used by walls, top layers and bottom layers.
- 4Enter the density of the final polymer-fertiliser blend.
- 5Set the fertiliser loading, active nutrient content and expected waste.
- 6Review the blend, polymer and fertiliser masses before preparing a test batch.
Example Calculation
Solid model volume
120
Infill percentage
25%
Shell and top-layer allowance
12%
Composite density
1.25
Fertiliser loading
20%
Active nutrient content
15%
Preparation and print waste
10%
Total blend to prepare
61.1 g
For this example, prepare about 61.1 g of blend: roughly 48.8 g of base polymer and 12.2 g of fertiliser additive. The blend contains about 1.83 g of the selected active nutrient.
Frequently asked questions
What is solid model volume in 3D printing?
It is the volume a model would occupy if it were printed at 100% solid fill. Many slicers report this value or provide a material-volume estimate.
Why does the calculator add a shell allowance?
Walls, top layers and bottom layers often use more material than the infill percentage alone suggests. The allowance provides a simple way to account for that extra material.
How do I choose a composite density?
Use a measured density for your tested blend where available. Otherwise, use an initial estimate based on the polymer and additive, then refine it after weighing trial prints.
What does fertiliser loading mean?
Fertiliser loading is the fertiliser additive mass as a percentage of the total prepared polymer-fertiliser blend. A 20% loading means 20 g of fertiliser in every 100 g of blend.
Does this calculator predict nutrient release from the print?
No. It estimates material quantities and nutrient mass only. Release behaviour depends on the fertiliser, polymer, print geometry, porosity, moisture, temperature and other conditions.
Why should I include print waste?
Small batches can lose material during mixing, extrusion, purging, transfer and failed prints. Adding a waste percentage helps avoid preparing too little material.
Explore Related Calculators
Assumptions and warnings
Assumptions
- The solid model volume is the volume of a fully solid version of the printed part.
- Shell and top-layer allowance is an approximate addition to the slicer infill percentage.
- The selected composite density represents the final, well-mixed printable blend.
- The fertiliser loading is measured as a percentage of total blend mass.
- The waste allowance covers mixing, purging, handling and unsuccessful print losses.
Warnings
- This calculator provides planning estimates only; actual material use varies with slicer settings, geometry, printer calibration and losses.
- Check that the fertiliser additive is compatible with the polymer, processing temperature and intended use before printing.
- Avoid handling or using fertiliser-loaded prints in ways that could create dust, contamination or unintended nutrient exposure.