This free DPI converter calculates print size from pixel dimensions, required pixels from print size, and effective image resolution at a chosen print size. It supports inches, centimeters, and millimeters. It does not resize images or edit DPI metadata.

Divide each pixel dimension by 300. A 3000 × 2400 pixel image prints at 10 × 8 inches at 300 PPI. In the calculator, select Pixels → print size, enter the pixel dimensions, and set the target resolution to 300.

An 8 × 10 inch print needs 2400 × 3000 pixels at 300 PPI. Multiply each print dimension in inches by the target PPI. These dimensions exclude bleed.

Divide the image width in pixels by its print width in inches, and do the same for the height. A 3000 × 2400 pixel image printed at 20 × 16 inches has an effective resolution of 150 PPI on both axes.

PPI means pixels per inch and describes image resolution at a chosen physical size. DPI means dots per inch and describes printer output. This tool calculates PPI, although DPI converter is a common name for this type of calculator.

Changing the resolution value without resampling does not add pixels or detail. With the same pixel dimensions, changing 72 PPI to 300 PPI makes the calculated print size smaller. Resampling adds pixels but does not guarantee sharper results.

Convert the measurement to inches, then multiply by PPI. Divide centimeters by 2.54 or millimeters by 25.4. For example, 25.4 centimeters equals 10 inches, which requires 3000 pixels at 300 PPI.

Pixel dimensions must be whole numbers. The tool rounds each required dimension up so the image meets or exceeds the selected pixel requirement. Other displayed measurements are rounded to three decimal places; calculations use full precision.

Different values mean the image and print area have different proportions. Stretching the image fills that area but distorts it. Cropping can fill the area while preserving proportions; fitting the full image leaves margins. Adjust the print dimensions if you want matching PPI values.

You can select an image to read its pixel width and height in your browser. Enter the intended print size to calculate effective PPI. The file is not sent to a server, and the tool does not read its embedded DPI metadata.

No. Calculations use the dimensions you enter. If your printer requires bleed, include it in the width and height before calculating the required pixels. Ask your print provider for its bleed and resolution specifications.

No. The download button saves a text summary of the calculation. To resize an image or change its resolution metadata, use an image editor. This calculator helps determine the dimensions and resolution to use.