Image Print Size Calculator
Enter your image's pixel dimensions and DPI to instantly calculate the maximum print size in inches, centimeters, and millimeters.
3000 × 2000 px at 300 DPI — 6 megapixels
Inches (in)
10 × 6.66666667
Centimeters (cm)
25.4 × 16.93333333
Millimeters (mm)
254 × 169.33333333
Print quality at 300 DPI: Professional / Photo
How to calculate image print size
- Enter the image's width and height in pixels. You can find these in your image editor or file properties.
- Select a DPI preset or enter a custom DPI value.
- The calculator instantly shows the maximum print size in inches, centimeters, and millimeters.
How print size and DPI are related
The formula is straightforward: Print size (inches) = pixels ÷ DPI. A 3000-pixel wide image printed at 300 DPI produces a 10-inch wide print. The same image at 150 DPI produces a 20-inch wide print — but with lower detail per inch. No image data is added or removed; the pixels are simply spread over a different physical area.
Common DPI guidelines for printing
Privacy — runs in your browser
No images are needed or uploaded. All calculations run locally in your browser. No signup required.
Frequently Asked Questions
What pixel size do I need for a 4×6 print at 300 DPI?
4 × 300 = 1,200 pixels wide and 6 × 300 = 1,800 pixels tall. So you need at least 1200×1800 pixels. Most digital cameras produce images well above this size.
Can I increase DPI without resizing the image?
No — the DPI value stored in a file is just metadata. Changing it only tells the printer how to interpret the existing pixels. To genuinely increase DPI, you either need more pixels (higher-resolution source) or a smaller print size.
What if I need a larger print than the calculator shows?
You can either upscale the image in an editor (which adds interpolated pixels — quality varies) or reduce the target DPI. For large prints viewed from a distance (posters, banners), 100–150 DPI is often acceptable.