Core formula
Print width (in)=pixel width÷PPI and print height (in)=pixel height÷PPI. With the same pixels, higher PPI means a smaller physical print.
059 · UNIT & CALCULATOR
Pixel & Print Size Converter
Calculate print size from pixels and PPI, find required pixels, effective PPI, and aspect ratio.
LOCALCALCULATE IN YOUR BROWSER
LOCALValues and results are calculated only in this browser and are not sent to or stored on a server.
Quick PPI
Aspect ratio lock
RESULT · Result
25.4 × 16.9333cm
10 × 6.6667inch
254 × 169.3333mm
6 MPMegapixels
3:2Aspect ratio · landscape
Image resolution is calculated in PPI. Printer device DPI is a separate concept.
HOW TO USE
How to use
- 01
Choose Pixels to Print, Print to Pixels, or Effective PPI.
- 02
Enter pixel dimensions and PPI or the target physical size.
- 03
Use A-series, photo, card, and quick PPI presets when useful.
- 04
Review inch/cm/mm, required pixels, effective PPI, aspect ratio, and megapixels.
- 05
Check any ratio warning and copy the values you need for the print workflow.
PRINT RESOLUTION GUIDE
Use the pixel, PPI, and physical-size relationship
Actual pixel count and target print size matter more than metadata alone. Compare required pixels and effective PPI on the same basis.Required pixels
Required pixels=target inches×PPI. A4 210×297mm at 300 PPI is approximately 2480×3508px.
Effective PPI
For existing pixels printed at a chosen physical size, effective PPI=pixels÷inches. It shows the density available without adding pixels.
PPI vs DPI
PPI describes image pixel density; DPI describes printer dot capability. They may be mixed conversationally but are different concepts.
Aspect ratio
3000×2000px is 3:2. A different paper ratio can require cropping, margins, or distortion, so check the ratio warning.
Quick reference
3000×2000px @300 PPI ≈ 10×6.67in = 25.4×16.93cm. 300 PPI is a common reference, not a universal requirement.
IMPORTANT NOTES
Important notes
- Image resolution is calculated in PPI; printer device DPI is a separate concept.
- Pixels divided by PPI gives physical inches, so higher PPI makes the same pixel dimensions print smaller.
- Changing only PPI metadata does not create new pixels; resampling is required to increase pixel count.
- 300 PPI is a common print reference, not a universal rule for every output condition.
- If pixel and target print aspect ratios differ, cropping, margins, or distortion may be required.
- This calculator does not resize, upscale, interpolate, or write DPI metadata to image files.
FAQ
Frequently asked questions
01How large is a 3000×2000px image at 300 PPI?+
About 10×6.67 inches, or 25.4×16.93cm.
02How many pixels are needed for A4 at 300 PPI?+
Approximately 2480×3508px.
03Are DPI and PPI the same?+
They are often mixed in conversation, but this tool separates image PPI from printer device DPI.
04Does changing 72 PPI to 300 PPI make an image sharper?+
Not if only metadata changes and no resampling adds pixels.
05Is 300 PPI always best?+
No. Required resolution depends on output equipment and viewing distance.