How big can your photo print?

Choose what you want to find

When you know the source pixels and a PPI value, divide each pixel edge by PPI to find inches. When you know the physical photo size, divide the pixels actually used by each physical edge to find effective PPI.

If the image and target have different ratios, choose fill or fit before interpreting the result. The original full-width and full-height values cannot both be forced onto a different frame shape without cropping, borders, or distortion.

For Print size → pixels, each edge is rounded up to a whole pixel so the result meets the selected PPI. An exact 10 × 15 cm target at 300 PPI requires 1182 × 1772 pixels; the result remains a valid integer pixel input for comparisons and reports.

A 6000 × 4000 example

At 300 PPI, the uncropped source corresponds to 20 × 13⅓ inches, or 50.8 × 33.8666… cm. At 240 PPI, the same pixels correspond to 25 × 16⅔ inches. Changing the planning value does not change the original image.

Use the unit controls to compare measurements without retyping rounded conversions. One inch is exactly 25.4 mm. The displayed decimal may be rounded while the calculation retains a more precise value.

Read effective PPI honestly

PPI describes pixel density at the selected physical size. It cannot guarantee sharpness, colour, or a particular quality of print. Inspect the image and consider the output method and viewing conditions alongside the number.

A manual calculation is based only on the numbers you enter. It does not verify the source file or show what a composition-sensitive crop will remove. Open the image when you need those checks.

Keep a report or continue to a layout

A numerical summary PDF records the calculation. It is a report rather than a photograph placed at physical scale. To export a cropped image or a paper-layout PDF, open the source and continue to the relevant tool.

Keep original image data separate from a resolution label. PrintLilt’s default image export does not enlarge the retained source pixels merely to match a target PPI.

Choose fill or fit

Fill the frame selects the largest source region with the target ratio and uses the whole frame. Keep the whole photo scales the complete source to fit inside it, leaving space where the two shapes differ. Both preserve the proportions of the scene.

For a 4000 × 3000 image in a 10 × 8 inch landscape frame, fill retains 3750 × 3000 pixels at 375 PPI. Fit places the image at 10 × 7.5 inches at 400 PPI, with quarter-inch borders above and below.

Protect the subject

Move the crop with the preview or use the position controls for a keyboard alternative. Check heads, hands, text, and the horizon. A small percentage of removed area can still contain something essential.

Set the correct photo and frame orientations before refining the position. A quarter-turn swaps width and height; a position that worked before rotation may not protect the same visual edge afterward.

Read the measurements together

The retained pixels describe the source region used. Removed area describes the share excluded by fill. Border dimensions describe unused frame space in fit. Effective PPI connects the retained image to its physical placement.

These measurements do not predict paper colour, print sharpness, or the visible opening of a frame lip. The preview is a composition guide and does not have a fixed physical scale on your screen.

Export the result you intend

Download photo pixels as JPEG or PNG. Select the complete target frame explicitly when fit borders should be included. PNG supports a transparent or solid background; JPEG requires a solid background.

For a photo placed on a sheet at a known size, continue to Print layout and export its PDF. Keep the original so another frame size can use content that this crop removes.

Start with the sheet

Choose a paper format and orientation, then set margins your printer can use. A4 is 210 × 297 mm; Letter is 8.5 × 11 inches. The tool knows these dimensions, but it cannot discover the printable area of your device.

Choose the photo rectangle independently. A photo can be smaller than the sheet with deliberate space around it. A printer’s Fit setting may shrink the whole page, so keep actual-size printing in mind from the start.

Place one photo

A landscape 10 × 8 inch photo centred on landscape Letter leaves 0.5 inch at each side and 0.25 inch above and below. In millimetres, those spaces are 12.7 and 6.35. Check the device’s margin instructions before relying on that placement.

Fill or fit applies inside the photo’s target frame. A fit border is therefore different from the outer page margin. Read both measurements when an image must fit an existing mount or be trimmed accurately.

Repeat a photo

A two-by-two grid of 5 × 3.5 inch landscape frames with 4 mm gaps occupies 258 × 181.8 mm. On landscape A4, centring that grid leaves 19.5 mm side margins and 14.1 mm above and below.

Each grid must fit across and down the sheet. Copies beyond that grid’s capacity continue on additional sheets of the same size. Check the total sheet count and use Previous sheet and Next sheet to inspect each page. If the grid itself does not fit, change its arrangement, frame dimensions, gap, margins, or paper size.

Print the layout

Download the physical layout PDF and include calibration when dimensions matter. Match the PDF’s sheet size in the print dialog and choose actual size or an equivalent 100% setting. Measure the first output before trimming or making more copies.

The separate numerical summary PDF reports settings; it is not this page placement. Save the project parameters and retain the original photo if you want to reproduce the layout later.