DPI and print size calculator
Open a photo or type the width and height in pixels to see how big it prints well, or calculate the pixels needed for a print size.
Print size and DPI
Everything happens on your device: nothing is uploaded to the internet.
Available in: 
DPI and print size calculator: what it is for
The calculator has three modes: the print size of an image at a given resolution (with a quality table for photos from 10 × 15 to 60 × 90 cm), the pixels needed to print a size in centimeters, and the resulting DPI of an image printed at a size.
You can open the photo so the tool reads its width and height in pixels; the image never leaves your device.
How to use
- Choose what to calculate.
- Type the pixels or open the photo, and the size or DPI.
- See the result and the expected quality.
When to use it
- Know if a phone photo prints well at 8 × 12 in.
- Prepare artwork for a print shop.
- Check the resolution before printing.
Frequently asked questions
What is DPI?
DPI (or PPI) is how many image dots fit in one inch (2.54 cm) of paper. The more dots per inch, the sharper the print. The same photo printed bigger has a lower DPI.
What DPI should I print at?
300 DPI is the standard for photos and materials seen up close. Between 150 and 300 DPI quality is still good. Banners and signs seen from far away can be 100 DPI or less without looking blurry.
Does raising the DPI in an editor improve the photo?
No. Changing the DPI number without changing the pixels only changes the print size. To print bigger with quality, you need a photo with more pixels.
Is the photo uploaded anywhere?
No. The tool only reads the image's width and height in your browser.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.