Understand your speed test results
Read download, upload, latency and jitter together rather than treating one number as the whole connection.
Getting started · Updated:
Download and upload describe different directions
Download speed is the rate at which data reaches your device. It affects large downloads and the amount of content you can receive at once. Upload speed describes data leaving your device, including backups, live streams and outgoing video calls. A fast download result does not imply equally fast uploads.
The displayed rate is usually in Mbps. File managers often use MB/s, which counts bytes instead of bits. Use the unit converter before comparing these numbers.
Latency is about response time
Latency describes the time taken for a request and response between endpoints. A high transfer rate cannot eliminate a long response delay. Interactive applications can feel sluggish even when downloads are fast. Always consider the test destination: a result to one server is not a measurement of every game or meeting service.
Jitter describes variation
Jitter concerns changes in packet delay. A fluctuating response time can make real-time communication less predictable. Different tools may calculate jitter differently, so compare values from the same measurement method. The IETF definition of packet delay variation explains the underlying metric.
Use results as evidence
Compare repeated measurements under similar conditions. If a wired baseline is consistent but Wi-Fi is not, investigate the wireless connection first. If both degrade at particular times, collect examples and describe the conditions when contacting your provider. A speed test helps guide an investigation; it is not a complete diagnosis.
Network tools
My IP address
See your public IP, network organization and approximate location.
Transfer time calculator
Estimate how long a file takes to download or upload.
Speed unit converter
Convert between Mbps, Gbps, MB/s and MiB/s.