What DPI do I need to print sharp?

300 DPI is the standard for offset and digital print of photos, magazines and books. 150 DPI is acceptable for large posters viewed from a distance, and 600+ DPI is used for fine line art.

Can I increase DPI by upscaling in Photoshop?

Upscaling adds pixels by interpolation but does not add real detail — print sharpness is set by the original capture. Always start from the highest-resolution source you have.

PressmarksPrepress Tools

Print Resolution

Will your image print sharp at the size you want?

Enter your image's pixel dimensions and a print size to see the effective DPI and a clear verdict — or work the other way and find the largest sharp print size for any photo.

01 Image pixels

Drop an image to read its size

optional · stays on your device

Width

px

Height

px

02 Mode

03 Units

04 Print size

Width

in

Height

in

05 Use case

Effective resolution

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0100150220300400+

Image: —
Megapixels: —
Target: —

Max size @ 300 DPI

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Max size @ target

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DPI (dots per inch) and PPI (pixels per inch) mean the same thing here: how many image pixels fall into one printed inch. Bigger prints viewed from further away need fewer.

Print resolution is just pixels divided by inches. A 4000-pixel-wide photo printed 20 inches wide gives 200 DPI; print it 10 inches wide and you get 400. The smaller you print, the sharper it looks.

What counts as sharp?

For something held in the hand, 300 DPI is the gold standard and 240 is still excellent. Large prints are viewed from further away, so they can drop much lower without looking soft — a poster at 150 DPI or a banner at 100 looks crisp at normal viewing distance.

The formulaEffective DPI = image pixels ÷ print size in inches. Max sharp size = image pixels ÷ target DPI.

Resolution by use case

Output	Target DPI	Viewed from
Photo print	300	30 cm
Magazine / fine art	240–300	30 cm
Poster	150	1–2 m
Banner	100	2–4 m
Billboard	20–50	10 m+

Why upscaling won't save a small image

Enlarging an image in software adds pixels but no real detail, so the print still looks soft. The honest fix is to shoot or scan at higher resolution, or to print smaller. This calculator shows the true pixels you have, not an inflated number.

Frequently asked questions

Is DPI the same as PPI?

For this purpose, yes. PPI describes pixels per inch in a digital image; DPI describes dots per inch on the press. The calculation — pixels divided by print size — is identical.

My printer says 300 DPI but my file is 72 — is that a problem?

The 72 is just a metadata tag; what matters is the actual pixel count against your print size. Enter the real pixel width and height here to see the true result.

Do you upload my image?

No. If you drop an image it is only read locally to fetch its pixel dimensions. Nothing leaves your device.

Can I print bigger than the "max" size?

Yes, if it will be viewed from further away. Lower the target DPI to match the viewing distance and the maximum size grows accordingly.