3D Print Calcs

What is 3D Print Calcs?

3D Print Calcs is a free, ad-supported site of 3D printing calculators that also has seven small STL generators. Each one is a short form of numbers: you type the sizes, read a few preview numbers such as the inner cavity and a rough PLA weight, and download the STL. There is no 3D preview. The file is built in your browser, and there is no account.

The parametric box generator makes an open box from the outer width, depth and height and the wall and floor thickness, with a separate flat lid that has an inner lip, sized by a lid tolerance. The other generators make a round container with a slip-fit lid, a plain Gridfinity bin on the 42 mm grid (no magnet holes or label tab), a drawer divider grid with or without a floor, an adhesive cable clip, spacers and washers with hole sizes for M2 to M10 bolts, and a first layer test pattern sized to your bed. Each page adds print settings and sizing tips.

Downloads are STL, one file per part. The terms welcome commercial use of the calculators in your own workflow but say nothing about selling prints. The generators are basic next to dedicated box tools; they suit a quick lidded box, container or spacer when you already know the numbers.

What you can make

• Storage boxes with a fitted lid
• Round containers with slip-fit lids
• Gridfinity bins and drawer dividers
• Spacers, washers and cable clips
• First layer test patterns

How to use 3D Print Calcs

1. Open a generator from the homepage
2. Type the sizes and wall thickness
3. Check the preview numbers
4. Download the box and lid STLs