curl --request POST \
  --url https://api.iotools.cloud/v1/tool/rebar-weight-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "barSize": "#4",
  "length": "20",
  "lengthUnit": "ft",
  "quantity": "10"
}
'

{
  "tool": "rebar-weight-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "status": "#4 rebar, 20 ft × 10 bars: total weight is 133.6 lb (60.59 kg).",
    "result": [
      {
        "property": "Bar Size",
        "value": "#4 (13M)"
      },
      {
        "property": "Diameter",
        "value": "0.5\" / 12.7 mm"
      },
      {
        "property": "Unit Weight",
        "value": "0.668 lb/ft (0.994 kg/m)"
      },
      {
        "property": "Total Length",
        "value": "200 ft (60.96 m)"
      },
      {
        "property": "Total Weight",
        "value": "133.6 lb (60.59 kg)"
      }
    ],
    "refTable": [
      {
        "bar-size": "#3",
        "metric": "10M",
        "diameter": "0.375\" / 9.5 mm",
        "unit-weight": "0.376 lb/ft / 0.56 kg/m"
      },
      {
        "bar-size": "#4",
        "metric": "13M",
        "diameter": "0.5\" / 12.7 mm",
        "unit-weight": "0.668 lb/ft / 0.994 kg/m"
      },
      {
        "bar-size": "#5",
        "metric": "16M",
        "diameter": "0.625\" / 15.9 mm",
        "unit-weight": "1.043 lb/ft / 1.552 kg/m"
      },
      {
        "bar-size": "#6",
        "metric": "19M",
        "diameter": "0.75\" / 19.1 mm",
        "unit-weight": "1.502 lb/ft / 2.235 kg/m"
      },
      {
        "bar-size": "#7",
        "metric": "22M",
        "diameter": "0.875\" / 22.2 mm",
        "unit-weight": "2.044 lb/ft / 3.042 kg/m"
      },
      {
        "bar-size": "#8",
        "metric": "25M",
        "diameter": "1\" / 25.4 mm",
        "unit-weight": "2.67 lb/ft / 3.973 kg/m"
      },
      {
        "bar-size": "#9",
        "metric": "29M",
        "diameter": "1.128\" / 28.7 mm",
        "unit-weight": "3.4 lb/ft / 5.06 kg/m"
      },
      {
        "bar-size": "#10",
        "metric": "32M",
        "diameter": "1.27\" / 32.3 mm",
        "unit-weight": "4.303 lb/ft / 6.404 kg/m"
      },
      {
        "bar-size": "#11",
        "metric": "36M",
        "diameter": "1.41\" / 35.8 mm",
        "unit-weight": "5.313 lb/ft / 7.907 kg/m"
      },
      {
        "bar-size": "#14",
        "metric": "43M",
        "diameter": "1.693\" / 43 mm",
        "unit-weight": "7.65 lb/ft / 11.38 kg/m"
      },
      {
        "bar-size": "#18",
        "metric": "57M",
        "diameter": "2.257\" / 57.3 mm",
        "unit-weight": "13.6 lb/ft / 20.24 kg/m"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}