Image & Print Size

Banner & Poster Resolution Calculator

Convert banner size and DPI into pixel canvas dimensions and megapixels.

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in
in
DPI
Large banners are viewed from farther away, so required DPI drops. Enter final width/height and viewing assumptions to see a sensible pixel target.

How it works / formula

Calculation steps

  1. Pixels = inches × DPI for each side.
  2. Megapixels = (W×H pixels) ÷ 1,000,000.

Worked example

Example (illustrative)

  • 48 × 24 in at 100 DPI → 4800 × 2400 px (11.5 MP).

Assumptions & limitations

This calculator provides an estimate for planning and quoting. Actual results vary with supplier pricing, ink coverage, waste, labour rates, equipment and marketplace fee changes. Always verify critical numbers before production. See the disclaimer.

DPI by viewing distance

Use Typical DPI
Hand-held poster 150–300
Trade-show banner 72–150
Billboard / far 30–72

Frequently asked questions

Should I always use 300 DPI for banners?

Usually no — file size explodes. Match DPI to viewing distance and printer RIP advice.

Why is banner DPI lower than shirt DPI?

Viewing distance. A roadside banner does not need shirt-level detail.

What if the client zooms a photo of the banner?

Close-up photos can look soft even when the install looks fine at distance — set expectations.

Should I still use bleed?

Yes — finishing and pocket hems still need margin beyond the live area.

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Disclaimer · Last updated Oct 8, 2026