What the calculator answers
Estimate sheet count, orientation and width-based PPI before uploading an image. It plans paper use; it does not inspect the image or certify what your printer can reproduce.
Work through a real example
- Enter a finished width of 60 cm and height of 90 cm. Choose the paper you actually have.
- Start with 10 mm margins and 5 mm overlap, then compare Auto, portrait and landscape.
- Enter 3000 for the source pixel width. At 60 cm, the width-based result is about 127 PPI.
- Compare the paper-saving alternative by reading its dimensions as well as its sheet count. Do not use a reduced size for an exact-scale template.
- Open the poster maker with your image and check the full layout before printing. Calculator entries are planning values, not an automatically transferred project.
Understand its limits
The pixel input uses width only. If you crop, use the remaining pixel width and confirm the height separately. The viewing-distance estimate is an idealised visual-angle calculation, not a print-quality pass or fail.
Increasing overlap or margin can add whole rows of paper. If the count seems surprising, change one value at a time and check that you entered centimetres for the poster and millimetres for margins.