Image & Print Size

Aspect Ratio Calculator

Reduce width and height to a clean ratio and scale to a target width.

New here? Jump to how it works · FAQ

Same units as width. Set 0 to skip.
Lock width and height to a ratio so mockups, wraps and print sizes stay proportional when one side changes.

How it works / formula

Calculation steps

  1. Ratio = width:height reduced by GCD.
  2. If target width is set, height = target width ÷ (width/height).

Worked example

Example (illustrative)

  • 4500 × 5400 → 5:6.
  • At 12 in wide → height = 14.4 in.

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.

Common print ratios

Ratio Use
1:1 Stickers, album covers
5:6 Many portrait apparel graphics
2:1 / 2.5:1 Mug and tumbler wraps (brand-specific)

Frequently asked questions

Can I use pixels or inches?

Yes — keep both sides in the same unit.

Does aspect ratio replace DPI checks?

No. Ratio keeps proportions; DPI checks resolution for the final inches.

What if the customer wants a crop?

Changing ratio means cropping or letterboxing — confirm which they accept.

Useful for mug wraps?

Yes — keep artwork proportional while you adjust wrap height.

Embed this calculator

Add this tool to your shop site or blog. The snippet includes iframe auto-height (origin-checked postMessage). Embed URLs are noindex; the canonical URL stays this calculator page.

Open embed view

Keep exploring

More in Image & Print Size · Resources hub · Guides · FAQ · Disclaimer

Disclaimer · Last updated Oct 8, 2026