Free tool

DPI Checker

Enter your image's pixel size and the size you want to print. This tells you the effective DPI and whether it will print sharp — before a buyer ever prints it.

Quick-fill a common print size

Image width (px) Image height (px) Print width (in) Print height (in)

Runs in your browser. Nothing is uploaded.

How it works

Effective DPI is your pixels spread across the print size: DPI = pixels ÷ inches, taking the smaller of width and height. If a 2400×3000 image is printed at 8×10 inches, that's 300 DPI — sharp. Stretch the same file to 16×20 and it drops to 150 DPI — soft.

What the verdict means

Effective DPI	Result
300+	Sharp — ideal for any print
200–299	Good for medium/large prints
150–199	OK for large art viewed from a distance
Under 150	Too low — will look soft/pixelated

Preparing a listing? The free Ratio-Pack Generator writes true 300 DPI into every file and flags when an image is too small for a size.

Questions

Quick answers.

How do I check if my image is high enough resolution to print?

Divide the pixel width by the print width in inches (and height by height); the smaller result is the effective DPI. 300+ prints sharp; below ~150 looks soft.

What is a good DPI for printing?

300 DPI is the standard for sharp prints. Large art viewed from a distance can be acceptable at 150–200 DPI, but small prints need the full 300.

Can I make a small image bigger without losing quality?

Not really — enlarging adds pixels without detail, so it looks soft. Start from the highest-resolution original, or regenerate vector/design-tool art at a larger size.