Printer Resolution / DPI Test
The dpi number on a printer's spec sheet is close to meaningless for judging what it actually resolves on paper — ink spread, paper texture, and the print engine itself all reduce it well below the marketed figure, and often by a different amount on each axis. This test prints five blocks of parallel lines at decreasing spacing, both horizontally and vertically, so you can see with your own eyes the finest spacing your printer still renders as distinct lines rather than a solid gray block.
If the button doesn't work, press Ctrl+P (Windows/Linux) or Cmd+P (Mac) to open your browser's print dialog.
This is an on-screen preview. Your printer, paper, ink or toner level, and print driver settings all affect the final physical result.
How to use this printer test
- Print at 100% scale on plain paper, at your printer's normal (not draft) quality setting.
- Choose your paper size above; the preview updates instantly.
- Look at the horizontal-line blocks first (top half), then the vertical-line blocks (bottom half) — read each set from widest spacing to narrowest.
- Use a loupe or magnifying glass on the two finest blocks if you're judging resolution for detailed work like fine text or line art.
What should the printed page look like?
Where lines stop separating
Read each row from top (widest spacing) to bottom (narrowest). Find the last block where you can still clearly count individual lines rather than seeing a uniform gray fill — that spacing is roughly your printer's real usable resolution on that axis.
A different result horizontally vs. vertically
It's normal — even expected — for a printer to resolve one axis better than the other, since the print head moves in one direction while the paper feeds in the other. A noticeably worse result on one axis isn't a fault, just a mechanical reality of the print engine.
Lines that are broken instead of blurred
If lines look broken or gappy rather than simply merging together at fine spacings, that's more likely a nozzle or toner coverage issue than a resolution limit — run a nozzle check to compare.
Common printer problems
Even the widest-spaced block looks blurry or merged
Likely cause: The printer is set to a draft or low-quality mode, which deliberately reduces resolution to save ink or toner and print faster.
How to fix it: Switch the print quality setting to "Normal" or "High" in the driver and print the test again.
Resolution is fine on plain paper but worse on photo or glossy paper
Likely cause: The paper type selected in the driver doesn't match the paper actually loaded, so the printer is using the wrong ink/toner density profile for that surface.
How to fix it: Make sure the paper type setting in your print dialog matches what's physically loaded — glossy photo paper needs its own profile, not the plain-paper default.
One specific block shows faint horizontal banding instead of clean lines
Likely cause: On inkjets, this can indicate partially clogged nozzles; on laser printers, an aging or unevenly wearing drum.
How to fix it: Run our Nozzle Check test (inkjet) or Grayscale/density check to isolate whether this is a resolution limit or a separate print-quality defect.
Frequently asked questions
How do I find my printer's real resolution, not just the spec sheet number?
Print this test and find the finest line spacing that still prints as clearly separated lines rather than a solid gray block — that's roughly your printer's real usable resolution, which is almost always lower than its marketed dpi figure.
Why is my printer's resolution different horizontally and vertically?
This is normal. The print head moves across the page in one direction while the paper advances in the other, and most print engines resolve those two axes slightly differently as a result.
Does higher dpi always mean a sharper print?
Only up to a point. Once you're past the finest spacing your printer can actually resolve (as shown by this test), a higher dpi setting mostly means a larger file and slower print, not a visibly sharper result.