---
name: "CURLINFO_SPEED_DOWNLOAD"
section: "3"
platform: "macos"
package: "curl"
version: "166.0.0.0.1"
release: "macOS 26.5"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLINFO_SPEED_DOWNLOAD"
---

# CURLINFO\_SPEED\_DOWNLOAD(3)

get download speed

## NAME

CURLINFO\_SPEED\_DOWNLOAD - get download speed

## SYNOPSIS

```
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SPEED_DOWNLOAD,
                           double *speed);
```

## DESCRIPTION

Pass a pointer to a double to receive the average download speed that curl measured for the complete download. Measured in bytes/second.

*[CURLINFO\_SPEED\_DOWNLOAD\_T(3)](/CURLINFO_SPEED_DOWNLOAD_T/3.md)* is a newer replacement that returns a more sensible variable type.

## PROTOCOLS

## EXAMPLE

```
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
    /* Perform the request */
    res = curl_easy_perform(curl);
    if(!res) {
      double speed;
      res = curl_easy_getinfo(curl, CURLINFO_SPEED_DOWNLOAD, &speed);
      if(!res) {
        printf("Download speed %.0f bytes/sec\n", speed);
      }
    }
  }
}
```

## AVAILABILITY

Added in 7.4.1. Deprecated since 7.55.0.

## RETURN VALUE

Returns CURLE\_OK if the option is supported, and CURLE\_UNKNOWN\_OPTION if not.

## SEE ALSO

[**CURLINFO\_SIZE\_UPLOAD\_T**(3)](/CURLINFO_SIZE_UPLOAD_T/3.md), [**CURLINFO\_SPEED\_UPLOAD**(3)](/CURLINFO_SPEED_UPLOAD/3.md), [**curl\_easy\_getinfo**(3)](/curl_easy_getinfo/3.md), [**curl\_easy\_setopt**(3)](/curl_easy_setopt/3.md)