Free calculator
How large can I print this photo?
Resolution, crop and viewing distance — the three numbers that decide sharpness.
Try the calculator
Photography
How print size is calculated
Print width in inches is pixel width divided by dots per inch. Height uses the same formula. Centimetres are inches multiplied by 2.54, and megapixels are the total pixel count divided by one million.
Why 300 DPI is a rule of thumb
300 DPI is the usual standard for prints viewed closely. Large prints viewed from a distance look sharp at 150–200 DPI. The calculator shows the size at the DPI you enter so you can judge the trade-off instead of guessing.
Who it is for
Photographers and designers checking whether a file is big enough for a print order before paying for a large format.
Frequently asked questions
Can I upscale to print bigger?
Yes, but upscaling invents detail. For a modest increase it is usually fine; for a large poster, a sharper original or a lower DPI is a better answer.
Does cropping change the result?
Yes. Crop first, then enter the cropped pixel dimensions. The calculator uses the pixels you give it.
What DPI should I enter?
300 for a photo book or a print viewed in hand, 200 for a framed print, 150 for a poster viewed from a metre or more.