Enter pixel dimensions
Manual entry is useful when you know the image dimensions but do not have the file open. The calculator uses the numbers you provide; it does not inspect or validate a photograph in this mode.
What you can calculate
Enter pixel width and height to compare physical print sizes at a chosen PPI. Alternatively, compare those pixels with a target physical size to understand the resulting density and any ratio mismatch.
This mode supports numerical planning without granting access to a local photo. It does not show whether an important subject is near the crop edge, judge focus, or create missing image data.
Calculate size from pixels and PPI
Enter 6000 for pixel width, 4000 for pixel height, and 300 for PPI. The uncropped size is 20 × 13⅓ inches, or 50.8 × 33.8666… cm. The interface rounds the displayed number; the calculation retains its underlying precision.
Switching inches, centimetres, or millimetres changes the unit, not the intended physical size. One inch is exactly 25.4 mm. Avoid typing a rounded conversion back into the original field when you need to preserve the precise value.
Compare a fixed physical size
A 3000 × 2000 image at 6 × 4 inches has 500 PPI in both directions and no required crop. A 4000 × 3000 image in a 10 × 8 frame needs a fill-or-fit decision because the shapes differ.
Fill retains 3750 × 3000 pixels at 375 PPI. Fit keeps all the pixels in a 10 × 7.5 inch picture at 400 PPI, with quarter-inch borders above and below. Use the actual image rectangle, not a surrounding border, when interpreting PPI.
Enter valid values and read the result
Pixel dimensions must be positive whole numbers, and physical dimensions and PPI must be positive finite values. Correct a highlighted field without discarding the valid values in the others. Zero, negative, empty, or non-numeric values cannot produce a meaningful print calculation.
A numerical summary PDF is a report of these settings and results. It is not a photograph placed at physical scale. To export a real crop or a photo-layout PDF, open the source image and check the preview first.