Work out dpi to ppi instantly with clear inputs, formula shown and shareable results.
PPI describes pixels per inch in an image or on a display, while DPI strictly means printer dots per inch - printers lay several dots per pixel to build colour. What matters for output is the effective ppi: 3000 pixels across 25.4 cm gives exactly 300 ppi, the photographic print standard.
Effective resolution
ppi = pixel width / print width in inches
Maximum print size
inches = pixels / target ppi
In casual use yes, but strictly no. A 1200 dpi inkjet uses many small ink dots to render each 300 ppi image pixel.
Interpolation adds pixels but no detail. It can help avoid visible pixel edges, but it cannot recover information that was never captured.