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Print Size and DPI Calculator

Largest quality print from your megapixels, and the DPI you'll get.

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Rex says

Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.

Try a scenario

Click to load — tweak from there.

Inputs

Result

Max print width at target DPI (in)

20.0

Max print height (in)

13.3

DPI at your desired width

250

Print height at that width (in)

16.0

Megapixels

24.0

Aspect ratio

1.50:1

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How to use this

  1. 1Enter image width (px).
  2. 2Enter image height (px).
  3. 3Enter target print quality.
  4. 4Enter desired print width (in).
  5. 5Read your max print width at target dpi (in) on the right — it updates as you type.
  6. 6Hit Share to keep the scenario or send it to someone.

About this calculator

Print quality is pixels per inch at the intended viewing distance. A 24-megapixel file makes a gorgeous 16×24 at 300 DPI and a perfectly good 40×60 gallery print viewed from six feet. This shows both limits.

FormulaPrint inches = pixel dimension ÷ DPI; DPI = pixel dimension ÷ print inches.

Worked example

Using the values the calculator loads with:

Inputs

  • Image width: 6000 px
  • Image height: 4000 px
  • Target print quality: 300 DPI — standard photo print
  • Desired print width: 24 in

Results

  • Max print width at target DPI (in): 20
  • Max print height (in): 13.3
  • DPI at your desired width: 250
  • Print height at that width (in): 16
  • Megapixels: 24
  • Aspect ratio: 1.50:1

What each field means

Inputs

Image width (px)
The image width used in the calculation, measured in px. Starts at 6000 px so you have a working example on load.
Image height (px)
The image height used in the calculation, measured in px. Starts at 4000 px so you have a working example on load.
Target print quality
Pick the option that matches your situation — the maths changes per option. Choices: 360 DPI — fine art / close viewing, 300 DPI — standard photo print, 200 DPI — large print, arm's length, 150 DPI — poster, several feet away, 100 DPI — banner, across a room.
Desired print width (in)
The desired print width used in the calculation, measured in in. Starts at 24 in so you have a working example on load.

Results

Max print width at target DPI (in)
Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Max print height (in)
Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
DPI at your desired width
Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Print height at that width (in)
Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Megapixels
Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Aspect ratio
Returned as a plain value. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.

FAQ

Is 300 DPI always required?

No — 300 DPI is a print-shop convention for images held at reading distance. Billboards run under 20 DPI and look flawless because nobody stands two feet away.

Can I upscale to print bigger?

Modern AI upscalers genuinely add usable detail for 2× enlargements of clean, well-focused files. They cannot rescue soft focus or heavy noise.

Accuracy and limitations

  • Estimates assume standard, average conditions — local rules, pricing, and materials vary.
  • Results are rounded for readability; add a buffer before ordering, booking, or committing.
  • Double-check anything with a real cost attached against a local quote.

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Aspect Ratio Calculator

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Cite this calculator

Writing about this topic? Grab a citation — every link helps keep these tools free.

APA
RevenueLab. (2026). Print Size & Resolution Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/print-resolution
HTML
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/print-resolution" target="_blank" rel="noopener">Print Size & Resolution Calculator — RevenueLab</a> (2026).</p>
Markdown
Source: [Print Size & Resolution Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/print-resolution) (2026).
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