curl --request POST \
  --url https://api.iotools.cloud/v1/tool/image-print-size-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "mode": "pixels-to-print",
  "widthPx": "3000",
  "heightPx": "2000",
  "dpi": "300"
}
'

{
  "tool": "image-print-size-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "results": [
      {
        "property": "Print Size (in)",
        "value": "10 × 6.67"
      },
      {
        "property": "Print Size (cm)",
        "value": "25.4 × 16.93"
      },
      {
        "property": "Print Size (mm)",
        "value": "254 × 169.33"
      },
      {
        "property": "Megapixels",
        "value": "6 MP"
      },
      {
        "property": "Orientation",
        "value": "Landscape"
      },
      {
        "property": "Total Pixels",
        "value": "6000000"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}