Internet Speed Test
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Understanding Your Speed Test Results
Download and upload speeds measure your connection's bandwidth, while the latency figure reflects ping and latency - Two different qualities that together determine how fast your internet feels.
| Metric | What it measures | Affects | Good target |
|---|---|---|---|
| Download | Data arriving at your device from the internet | Streaming, browsing, downloads | > 25 Mbps |
| Upload | Data sent from your device to the internet | Video calls, cloud backup, live streaming | > 10 Mbps |
| Latency | Round-trip time for a data packet to reach the server | Online gaming, video calls, real-time apps | < 30 ms |
Speed Requirements by Activity
| Activity | Minimum Download | Recommended |
|---|---|---|
| Web browsing & email | 1 Mbps | 5 Mbps |
| HD video streaming (1080p) | 5 Mbps | 15 Mbps |
| 4K / UHD streaming | 25 Mbps | 50 Mbps |
| Video call (HD) | 3 Mbps ↑↓ | 10 Mbps ↑↓ |
| Online gaming | 10 Mbps | 50 Mbps + <20ms ping |
| Work from home | 25 Mbps | 100 Mbps |
| Large file transfers | Higher is better | 500+ Mbps |
Why Is My Speed Slower Than Expected?
- Wi-Fi signal - Move closer to your router or use an Ethernet cable for the fastest speeds.
- Router overload - Restart your router and reduce the number of connected devices.
- ISP throttling - Some providers cap speeds for streaming services during peak hours.
- VPN overhead - Encryption adds latency and can reduce throughput by 10–30%.
- Background apps - Close anything uploading or downloading in the background.
- Peak hours - Residential speeds often drop between 7–10 PM when usage is highest.
How to Get a Result You Can Trust
Most speed tests that produce a disappointing number are measuring something other than the connection. Before concluding your line is slow, control these variables:
- Test over Ethernet if you can. Wi-Fi frequently caps below the line speed, so a wireless test measures your Wi-Fi, not your internet.
- Close streaming, cloud sync, and large downloads on every device in the household - they share the same pipe.
- Disconnect any VPN. Encryption overhead and a longer route both reduce the figure.
- Run the test three times at different times of day. Evening congestion is normal and a single reading tells you little.
- Compare against the speed in your contract, not the headline advertised speed - they are frequently different numbers.
When Latency Matters More Than Speed
For a large share of everyday complaints, bandwidth is not the problem at all. If pages hesitate before loading but then arrive quickly, that is latency or DNS. If video calls stutter while downloads are fine, that is jitter or packet loss.
| Symptom | Likely metric at fault |
|---|---|
| Pages pause, then load fast | DNS resolution delay |
| Video calls break up, downloads fine | Jitter and packet loss |
| Games lag, speed test looks good | Latency, and buffer bloat under load |
| Everything slow at 8pm only | Upstream congestion at the ISP |
| Uploads crawl, downloads fine | Asymmetric line - normal on cable and DSL |
Frequently Asked Questions
What is a good internet speed?
For one person browsing and streaming HD video, 25 Mbps down is enough; a busy household with 4K streaming, gaming, and video calls is comfortable from about 100 Mbps. Upload matters more than most people think - 10 Mbps or more keeps video calls and cloud backups smooth. For gaming, low and stable latency matters far more than raw bandwidth.
Why is my internet slower than the speed I pay for?
The most common culprit is Wi-Fi: distance, walls, and older wireless standards can cut a fast plan to a fraction of its rated speed. Other causes include peak-hour congestion, an overloaded or outdated router, an active VPN, and other devices using the line. Advertised speeds assume a wired connection, so always test over Ethernet before blaming your provider.
Why is my upload speed so much slower than my download speed?
Most cable and DSL plans are asymmetric by design: the technology dedicates far more channel capacity to downloads because typical usage is download-heavy, so a 500/20 Mbps cable plan is completely normal. Fibre connections are usually symmetric or close to it, which is why fibre suits creators, frequent video callers, and anyone backing large files up to the cloud.
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Sources & Further Reading
The technical claims on this page are drawn from the primary specifications and vendor documentation below.
- FCC — Broadband Speed Guide FCC
- RFC 5136 — Defining Network Capacity RFC Editor