DPI / print-size solver API

Solves among pixel count, physical print size, and DPI given any two, also reporting PPCM and a quality verdict versus 300 DPI. Answers 'How big does a 3000px image print at 300 DPI?', 'What DPI do I get printing 1500px at 5 inches?'.

Price$0.04per request

MethodPOST

Route/v1/design/print-dpi

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

designprintdpippippcmimage-sizeresolutionpixels

API URLhttps://x402.hexl.dev/v1/design/print-dpi

Integration docs

Example request

{
  "pixels": 3000,
  "dpi": 300
}

Example response

{
  "pixels": 3000,
  "inches": 10,
  "mm": 254,
  "dpi": 300,
  "ppcm": 118.11,
  "quality": "print-quality",
  "interpretation": "3000px at 300 DPI prints 10in (254mm) — print-quality."
}

Input schema

{
  "type": "object",
  "required": [],
  "properties": {
    "pixels": {
      "type": "number",
      "description": "Pixel dimension along one axis",
      "examples": [
        3000
      ]
    },
    "inches": {
      "type": "number",
      "description": "Physical size in inches",
      "examples": [
        10
      ]
    },
    "mm": {
      "type": "number",
      "description": "Physical size in mm (alternative to inches)",
      "examples": [
        254
      ]
    },
    "dpi": {
      "type": "number",
      "description": "Dots/pixels per inch",
      "examples": [
        300
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}