{
  "schema_version": 2,
  "id": "commands/zcard",
  "title": "ZCARD",
  "url": "https://redis.io/docs/latest/commands/zcard/",
  "summary": "Returns the number of members in a sorted set.",
  "since": "1.2.0",
  "tags": [
    "docs",
    "develop",
    "stack",
    "oss",
    "rs",
    "rc",
    "oss",
    "kubernetes",
    "clients"
  ],
  "last_updated": "2026-07-24T11:07:00+02:00",
  "page_type": "content",
  "content_hash": "795c73c3c029466189fa4b8faf060a355085523fe4b954e4ea9ebc7e5fdc5eec",
  "sections": [
    {
      "id": "overview",
      "title": "Overview",
      "role": "overview",
      "text": "Returns the sorted set cardinality (number of elements) of the sorted set stored\nat `key`."
    },
    {
      "id": "required-arguments",
      "title": "Required arguments",
      "role": "content",
      "text": "<details open><summary><code>key</code></summary>\n\nThe name of the key that holds the sorted set.\n\n</details>"
    },
    {
      "id": "examples",
      "title": "Examples",
      "role": "example",
      "text": "redis> ZADD myzset 1 \"one\"\n(integer) 1\nredis> ZADD myzset 2 \"two\"\n(integer) 1\nredis> ZCARD myzset\n(integer) 2"
    },
    {
      "id": "redis-software-and-redis-cloud-compatibility",
      "title": "Redis Software and Redis Cloud compatibility",
      "role": "content",
      "text": "| Redis<br />Software | Redis<br />Cloud | <span style=\"min-width: 9em; display: table-cell\">Notes</span> |\n|:----------------------|:-----------------|:------|\n| <span title=\"Supported\">&#x2705; Standard</span><br /><span title=\"Supported\"><nobr>&#x2705; Active-Active</nobr></span> | <span title=\"Supported\">&#x2705; Standard</span><br /><span title=\"Supported\"><nobr>&#x2705; Active-Active</nobr></span> |  |"
    },
    {
      "id": "return-information",
      "title": "Return information",
      "role": "returns",
      "text": "**RESP2:**\n\n[Integer reply](../../develop/reference/protocol-spec#integers): the cardinality (number of members) of the sorted set, or 0 if the key doesn't exist.\n\n**RESP3:**\n\n[Integer reply](../../develop/reference/protocol-spec#integers): the cardinality (number of members) of the sorted set, or 0 if the key doesn't exist."
    }
  ],
  "examples": []
}