curl --request POST \
  --url https://api.iotools.cloud/v1/tool/audio-file-size-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "hours": "0",
  "minutes": "1",
  "seconds": "0",
  "audioFormat": "wav",
  "bitrateKbps": "128",
  "sampleRate": "44100",
  "bitDepth": "16",
  "channels": "2",
  "flacCompression": "60"
}
'

{
  "tool": "audio-file-size-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "fileSize": "10.09 MB",
    "sizeDetails": [
      {
        "metric": "Duration",
        "value": "1m 0s"
      },
      {
        "metric": "Format",
        "value": "WAV — 44,100 Hz / 16-bit / Stereo"
      },
      {
        "metric": "Estimated size",
        "value": "10.09 MB"
      },
      {
        "metric": "Bytes",
        "value": "10,584,000"
      },
      {
        "metric": "KB (1024 B)",
        "value": "10335.94"
      },
      {
        "metric": "MB (1024 KB)",
        "value": "10.09"
      },
      {
        "metric": "GB (1024 MB)",
        "value": "0.0099"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}