curl --request POST \
  --url https://api.iotools.cloud/v1/tool/steel-weight-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "units": "metric",
  "shape": "round-bar",
  "diameter": "25",
  "side": "",
  "acrossFlats": "",
  "width": "",
  "height": "",
  "legLength": "",
  "thickness": "",
  "wallThickness": "",
  "length": "6000",
  "material": "carbon-steel",
  "density": "",
  "quantity": "1"
}
'

{
  "tool": "steel-weight-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "results": [
      {
        "metric": "Weight (each)",
        "value": "23.12 kg (50.97 lb)"
      },
      {
        "metric": "Unit Weight",
        "value": "3.853 kg/m (2.589 lb/ft)"
      },
      {
        "metric": "Cross-Section Area",
        "value": "4.909 cm² (0.7609 in²)"
      },
      {
        "metric": "Volume (each)",
        "value": "2,945 cm³ (179.7 in³)"
      },
      {
        "metric": "Density Used",
        "value": "7,850 kg/m³ (490.1 lb/ft³)"
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}