Photo Print Sizes: Inches, Pixels, and Crop Calculator

Photo print sizes describe the width and height of the paper, usually in inches in US ordering menus. A 4 × 6-inch print needs 1,200 × 1,800 pixels at 300 pixels per inch (ppi). That tells you the pixel target, but you must also check the shape: a file that fits 4 × 6 will not fill 8 × 10 without cropping or adding borders.

Choose the print size before ordering a frame. Then check the crop preview, the pixels left after cropping, and any white border added by the print service. The chart and calculator below separate those decisions so a larger-looking file number does not hide an unwanted crop.

Photo print sizes in inches, centimeters, and pixels

These are common rectangular and square options, not a promise that every printer or lab offers every size. Pixel targets are calculated at 300 ppi without upscaling. Centimeter values are exact conversions of the listed inch dimensions.

For example, 6 inches × 300 ppi = 1,800 pixels. Changing a file's resolution tag to “300” does not add missing detail unless you also resample it. Adobe distinguishes pixel dimensions, physical size, and resampling in its image-size guidance.

Check pixels, crop, and borders

Use the dimensions of the actual file you will upload, not the camera's advertised megapixel count. Enter print width and height in the same orientation as your image. This calculator assumes centered cropping or centered borders and does not add a separate decorative border.

Image width (pixels)Image height (pixels)Print widthPrint heightPrint unitsInchesCentimetersPlanning resolution300 ppi240 ppi150 ppiHow to fill the paperCrop to fillFit whole image with borders

With a 6,000 × 4,000-pixel image and a 10 × 8-inch crop: 500 ppi; about 16.7% of the image area is cropped away. The 300 ppi target is 3,000 × 2,400 pixels.

“Crop to fill” answers whether the file can cover all the paper at the chosen density. “Fit whole image” shows the image's actual printed area and the resulting borders. Neither mode can judge focus, noise, compression artifacts, or the printer's output.

Why 4 × 6, 5 × 7, and 8 × 10 crop differently

An aspect ratio describes shape rather than size. The same 3:2 image can fill 4 × 6, 8 × 12, and 12 × 18 without a shape change. A 5 × 7 is a little less elongated; an 8 × 10 is squarer still. With a centered landscape crop, progressively more of the left and right edges disappears.

The display windows use the stated ratios; they are not actual-size paper templates. All three crops are centered.

For a numerical example, a 6,000 × 4,000-pixel file cropped to 10 × 8 inches becomes 5,000 × 4,000 pixels before any resizing. That removes 1,000 columns of pixels, or about 16.7% of the original image area. You can move a crop to protect a face or important detail, but you cannot keep the entire original composition and fill a different shape without distortion or borders.

Is 300 ppi always required?

It is a useful planning target for small prints inspected close up. Adobe notes that viewing distance affects the resolution a print needs. A large display viewed across a room may be acceptable at a lower density, but that is a reason to inspect a proof, not a universal promise that a low-resolution file will look good.

Ppi describes image pixels per printed inch. A printer's advertised dpi describes its marking system and is not the same input number. Follow the lab's file specification or printer workflow when it differs from a general planning value.

If the calculator shows a shortfall, first check whether you are using a reduced messaging-app copy instead of the original. Then consider a smaller print, a less aggressive crop, or a carefully inspected enlargement. More output pixels from upscaling do not establish that new fine detail is accurate.

Check whether the size includes a border

A 5 × 7 sheet with a white border is still 5 × 7 paper, but the image inside it is smaller. A mat can hide more of that image. Check the service's preview and product description for the paper size, image area, and any border already included.

If your goal is to fill a mat window, compare the printed image area with the actual window opening. An 8 × 10 frame supplied with a mat for a 5 × 7 photo usually needs the smaller photo behind that mat, not an 8 × 10 image squeezed into the opening.

Once the dimensions are settled, compare paper formats and finishes in our photo paper guide. Check the paper against your printer's supported media; a suitable sheet size alone does not establish compatibility.

For the next choices, use the glossy vs matte comparison to plan a paper sample. If the proof is unexpectedly dark, follow the dark-print troubleshooting sequence before changing the master file.

Before you place the order

1. Use the final file. Open it and check its pixel dimensions after cropping or editing.
2. Choose the paper dimensions. Make sure the menu is showing inches, centimeters, or another intended unit.
3. Inspect the whole preview. Check faces, hands, text, horizons, and anything near the edges.
4. Confirm crop or fit. Look for automatic fill settings and white borders.
5. Check the frame separately. Paper, image area, mat window, and frame outer dimensions are different measurements.
6. Order a small proof when the result matters. Judge color, detail, and paper finish under the light where it will be viewed.

For scans of family photographs, keep the untouched capture and make a separate print file. The old-photo digitizing workflow explains how to preserve that master, and the backup checklist helps keep another copy recoverable.

Sources

The chart uses 1 inch = 2.54 centimeters and pixels = inches × ppi. Crop calculations preserve proportions and assume a centered crop; fit calculations leave centered borders.

• Adobe: Image Size, Resolution, and Resampling
• Adobe: Resolution Specs for Printing Images
• Artelo: A Manufacturer Example of Mat and Frame Size Listings