Photo Print Size Planner

Find how large your photo can print at your chosen resolution.

Try an example: 24 MP photo at 300 PPI · Web image at 150 PPI

How it works

Convert image pixel dimensions into print dimensions in inches and centimeters at a specified pixels-per-inch resolution. Compare sizes without uploading the image.

Print width in inches equals pixel width divided by PPI. One inch equals 2.54 centimeters.
PPI describes image pixel density, not printer dot density. Calculated dimensions do not guarantee print quality.

For scripts and AI agents

JSON API: POST https://luminaprintplanner.usefulweb.app/api/v1/calculate (same calculation as this page)
Interface description: OpenAPI 3.1 · AI guide: llms.txt
MCP server (Streamable HTTP): https://luminaprintplanner.usefulweb.app/mcp · tool name lumina_print_planner

Example request

curl -s -X POST https://luminaprintplanner.usefulweb.app/api/v1/calculate \
  -H 'content-type: application/json' \
  -d '{"width":6000,"height":4000,"ppi":300}'

Related tools

Photo Crop & Resize Planner – Plan a precise crop and output size before resizing a photo.
Image Upscaler – Enlarge images 2×, 3× or 4× with classic Lanczos/Mitchell filters and sharpening (no AI).