How to use this calculator
Enter the actual pixel dimensions after any crop. Find size from pixels and PPI gives the dimensions at your chosen resolution. Fit whole photo on paper instead starts with your sheet dimensions and a minimum border, then reports the largest centered image that preserves every pixel, its four borders and its effective PPI. Choose inches or centimetres for physical measurements. Enter paper width and height in the orientation you intend to use; neither the paper nor the photo is rotated automatically. PPI describes image pixels per inch. Printer DPI describes ink dots and is a separate specification.
The formula
A worked example
A 6,000 × 4,000 pixel image at 300 PPI prints 20 × 13.333333 inches, or 50.8 × 33.866667 cm. On 10 × 8 inch paper with no minimum border, the whole image fits at 10 × 6.666667 inches and 600 PPI, leaving 0.666667 inch above and below. With a 0.5 inch minimum border, the image is 9 × 6 inches at 666.666667 PPI; the side borders are 0.5 inch and the top and bottom borders are 1 inch. These displayed decimals are rounded; the calculation retains full precision.
Assumptions & limitations
No cropping, stretching or resampling is applied. Paper-fit mode centers the whole image, so borders on two sides may exceed your minimum. The minimum border must leave positive space in both dimensions. It is your chosen allowance, not a printer specification; check printer margins and the lab preview, and disable automatic fill, crop or borderless enlargement if you want to keep this layout. Paper size includes the borders. White paper borders are not a separate mat board. PPI is a pixel-density calculation, not a guarantee of sharpness; focus, compression, subject and viewing distance also matter. This tool plans dimensions; it does not edit or export your image.
Common questions
Can I fit a photo on 8 × 10 paper without cropping?
Yes. Select Fit whole photo on paper. For a 6,000 × 4,000 landscape image on paper entered as 10 inches wide and 8 inches tall, the entire image is 10 × 6.666667 inches with borders above and below. Enter 8 wide and 10 tall for portrait paper; the image then fits at 8 × 5.333333 inches.
Why are the borders not equal on all four sides?
The photo and the available paper area can have different proportions. Keeping the whole photo requires extra space on one pair of edges. The entered border is a minimum, not a promise of four identical margins.
Does changing PPI add detail?
No. Changing the print-resolution metadata alone changes physical dimensions without creating additional image detail. Resampling is a separate operation and is not performed here.
Does a high effective PPI guarantee a sharp print?
No. It only measures available pixels per inch at this size. Original focus, compression, printing process and viewing distance also affect the result.
Supporting reference
The method above states this calculator’s assumptions. This reference provides related definitions and technical context.
Adobe Photoshop: image size, resolution and resampling ↗Formula and worked example checked against automated test cases. About our methodology.