To print an entire page, with text and diagrams (not to scale), hit Print this Page in left margin or footer of each page,
or select Print from your Browser menu.
Then from the printer dialog select a scaling option that fits the page to the paper size you're using.

To print just a section of a page with Windows Snipping Tool:
Press Windows Logo key + Shift + S.
The desktop will darken. Click and drag to select an area to save or print. Once selected, click the notification that appears for options to edit (draw on image), save or print.

Some calculators have an button to create and save diagrams in SVG format. If you need to print at high resolution, e.g. protractors or gauge faces, the SVG will print at much higher resolution than a PDF or PNG. And the SVG will scale up without loosing resolution.

Browsers may 'shrink to fit' larger SVG images.
Open SVG with Inkscape for more accurate printing.

You can convert an SVG to G-Code, which is understood by 3D printers, CNC machines, and laser or vinyl cutters.
There are many options here:
See SVG to G-Code or Inkscape to G-Code for details.
If your SVG doesn't open correctly in your CAD/CAM CNC Cutting app, try opening it first in Inkscape, then:
Edit / Select All -- Path / Object to Path -- Save as Inkscape SVG

SVG to G-Code JsCut SVG to G-Code svg2gcode

At the bottom or left margin of each page is a Diagrams to PDF button. Click to open new page, with current diagrams. From this page you can create Full Scale PDF documents of diagrams on the page. Print the PDF at 100% printer scale.

For large full scale templates, choose a PDF page size big enough to fit the entire image. (Mouse over images to see dimensions) Use 'Poster Print' to print the large PDF image over multiple pages and reassemble, or send the PDF to a Print Shop for 'plan' printing on a single large page. (see paper size chart below). If the template is very large, create it at a smaller scale and scale up to print (see below)

The easiest way to print a large PDF (at full scale) over multiple pages is with the free Adobe Acrobat Reader. Get Adobe Reader (Check if you need the 'Optional offers' before installing)

After you've created and saved the large PDF as above, open the PDF in Adobe Reader (look in your 'Downloads' folder). Make sure the entire template image is visible in Adobe Reader (scroll to check). If it's not, make sure you selected a large enough PDF Page Size when creating the PDF (as above).

Now select Print from Adobe Readers File menu. In the dialog that appears, select the Poster button. Set 'Tile Scale' to 100% and enter an Overlap value if you want the assembled pages to overlap for easy gluing/taping for assembly.