Print preparation guide

Why Photos Crop at Different Print Sizes

Compare common camera and print aspect ratios, see which sizes fit, and learn when to crop, add borders or choose another print.

Written and maintained byHossam Eldeen
Calculation reviewDocumented formulas and automated tests
Editorial standardSources, corrections and independence
Quick answer

Match the source and print aspect ratios to avoid cropping. A common 3:2 photo fits 4 × 6 and 12 × 18, loses about 6.7% at 5 × 7, and loses about 16.7% at 8 × 10 or 16 × 20 when the print is filled edge to edge.

crop % = 100 × (1 − retained aspect fraction)
Exact 3:2 fit4 × 6

No ratio crop after orientation is matched

Small crop5 × 7

About 6.7% removed from a 3:2 image

4:5 crop8 × 10

About 16.7% removed from a 3:2 image

Decision table

How a 3:2 camera image fits common edge-to-edge prints

Print sizePrint ratioImage retainedLikely decision
4 × 62:3100%Direct fit after orientation is matched
5 × 75:7About 93.3%Small crop or narrow borders
8 × 104:5About 83.3%Reposition the 16.7% crop carefully
11 × 1411:14About 84.8%Preview the non-standard crop
12 × 182:3100%Direct 3:2 enlargement
16 × 204:5About 83.3%Same shape and crop as 8 × 10
WORKED EXAMPLE / ORIGINAL CALCULATION

Worked case: fill and fit give different decisions

A 6000 × 4000 landscape image is ordered as 10 × 8 inches. Fill produces a borderless 5:4 composition by discarding image area. Fit preserves the whole 3:2 image and leaves borders. Neither option is inherently correct: the important decision is whether the missing scene is acceptable.

Fill uses 5000 × 4000 px and delivers 500 PPI. Fit uses all 6000 × 4000 px in a 10 × 6.67 inch image area: 600 PPI, with about 1.33 inches of total vertical border space.

What to do with the result

Compare the preview with faces, lettering and edge details in mind. Move the fill crop to keep the subject, or choose fit if the whole scene is essential. A print lab can apply additional borderless overcrop, so a ratio calculation does not guarantee every edge will survive production. Ask about the lab’s safe-content guidance.

  1. Choose orientation before the ratio calculation.
  2. Protect content near all edges.
  3. Do not confuse moving the crop with reducing crop loss.
Illustrative job, not a record of a customer order. Calculations use stated dimensions; provider requirements remain authoritative.
01

Aspect ratio describes shape, not size

A 4 × 6 and a 12 × 18 have the same 2:3 ratio even though one is much larger. An 8 × 10 and a 16 × 20 both use 4:5, so they share a shape but require different pixel counts.

Rotate the image and print together when comparing equivalent shapes. A 3:2 landscape becomes 2:3 in portrait; rotating only one of them changes the crop. The percentages in this table assume corresponding orientations are aligned.

02

Fill, fit or add a border

Fill covers the paper and crops image content that falls outside the target ratio. Fit shows the complete image and can leave borders on two sides. Expanding the canvas creates a deliberate border while preserving the source composition.

None is automatically correct. The subject placement, frame, lab product and intended design decide the best option.

03

Crop position protects the subject

A centered crop is only a mathematical default. Faces, text, horizons and important objects may need the crop shifted horizontally or vertically.

Preview the exact print ratio, then inspect the edges at the final size. Labs can also apply a small production crop for borderless output.

04

Cropping changes effective PPI

Cropping removes pixels. A 6000 × 4000 px 3:2 image cropped to a landscape 5:4 frame retains approximately 5000 × 4000 px. Calculate print resolution from those remaining dimensions, not from the original file.

05

Choose a ratio-friendly size when composition matters

If an edge-to-edge crop damages the image, choose a print that matches the camera ratio, add a border, or extend the canvas intentionally. A 3:2 source naturally fits 4 × 6, 12 × 18 and other 2:3 sizes.

Practical workflow

Use this order before you export.

  1. Identify the source image ratio.
  2. Select the exact print size and orientation.
  3. Compare fill and fit, then position the subject-safe crop.
  4. Calculate effective PPI from the pixels that remain.
Put the guide into practice

A print fills without cropping only when the image and paper share the same aspect ratio.

Use the linked calculator with your own dimensions, then verify the result against the provider's production requirement.

Preview your crop →