Why is my Wi-Fi slower than ethernet?

Wi-Fi signals are susceptible to interference, distance, and physical obstacles. Ethernet provides a direct, stable wired connection. For the most accurate speed test, connect via ethernet.

Internet Speed Test — Free, No App Required

1

Choose Your Settings

Choose a test size and ping depth above the gauge — Standard is the best balance of speed and accuracy.

2

Click Start Test

Press Start Test to run the measurements, which take 15–45 seconds depending on your chosen settings.

3

Review Your Results

Review the connection quality score, ping analysis, and suggested activities your connection supports.

Download Throughput

download_mbps = (bytes_downloaded × 8) / (seconds × 1_000_000)

Standard network throughput calculation. Bytes are multiplied by 8 to convert to bits, divided by elapsed seconds for bits-per-second, and divided by 1,000,000 for the megabits-per-second unit that ISPs advertise.

Ping (Round-Trip Time)

ping_ms = median(round_trip_times for N small requests)

Multiple small HTTP requests are sent, and the median round-trip time is reported as ping. Median is used rather than mean to reject outliers from brief network congestion.

Jitter

jitter_ms = standard_deviation(round_trip_times)

Measures ping variability across the test's many small requests. Low jitter (under 5 ms) indicates a stable connection; high jitter causes stuttering on video calls and lag spikes in gaming even when average ping looks acceptable.

Mbps (Megabits per Second) The standard unit for measuring internet connection speed. One megabit equals one million bits, and network engineers measure speeds in bits rather than bytes to match the physical layer's signaling rate.

Ping / Latency The round-trip time for a small data packet to travel to a server and back, measured in milliseconds. Low ping (under 20 ms) is essential for video calls, online gaming, and responsive remote work.

Jitter The variation in ping times across multiple measurements, expressed in milliseconds. Low jitter means a stable connection; high jitter produces inconsistent real-time performance.

Download / Upload Speed The rate at which data flows from the internet to your device (download) and from your device to the internet (upload). Most consumer connections are asymmetric, with download significantly faster than upload.

Packet Loss The percentage of data packets that fail to reach their destination. Low packet loss (under 0.5%) is normal; higher values cause video call dropouts, streaming stutters, and retransmission delays.

Bufferbloat A network condition where excessive buffering on your router creates latency spikes under load. A good connection should maintain low ping even during heavy download/upload activity.

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Home User — Remote Work Check

A remote worker verifying their home internet connection is adequate for video calls and cloud file sync before an important client meeting.

Test mode Standard Results Download: 85 Mbps, Upload: 12 Mbps, Ping: 18 ms, Jitter: 3 ms

Connection supports HD and 4K video calls comfortably, cloud file sync, and simultaneous streaming for other household members. Upload of 12 Mbps is the weakest metric but exceeds the 5 Mbps threshold for HD video calls. Low jitter confirms calls will be stable rather than choppy.

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Gamer — Latency Optimization

A competitive gamer troubleshooting inconsistent performance in online matches, looking for the root cause of lag spikes.

Test mode Thorough (high ping-depth) Results Download: 250 Mbps, Upload: 40 Mbps, Ping: 28 ms average, Jitter: 22 ms

Download and upload are excellent for gaming, but jitter of 22 ms is the culprit — high variability causes the observed lag spikes even with decent average ping. Recommendation: switch from Wi-Fi to ethernet, check for background cloud backups consuming upload bandwidth, and consider a gaming-aware router with QoS to prioritize game traffic.

Internet speed tests are one of the most common technical tools in everyday use, run by ordinary consumers to check ISP compliance, by remote workers to diagnose video-call issues, by gamers hunting for latency problems, and by technicians validating installations. Despite that ubiquity, the numbers they produce are widely misinterpreted. The sections below explain what the various metrics (download, upload, ping, jitter) actually measure, why different speed tests produce different results for the same connection, and how to use the results to make actual decisions about your network setup.

What the Numbers Actually Measure

A modern speed test produces four headline metrics plus several secondary ones, each measuring something specific about your connection. Download speed measures how fast you can receive data from the internet — the number ISPs advertise most prominently because it matters for streaming, downloads, and web browsing. Modern US household connections range from roughly 25 Mbps (barely adequate) to 1 Gbps (fiber) to 2+ Gbps (newer fiber and DOCSIS 4.0 tiers). Upload speed measures how fast you can send data to the internet, typically far lower than download on consumer connections. Upload matters for video calls, cloud file sync, game streaming, and any interactive real-time application. The widely-deployed cable and 5G home internet has historically been asymmetric (100 Mbps down / 10 Mbps up), though newer fiber tiers are usually symmetric. Ping (also called latency) measures round-trip time for small data packets in milliseconds, and it matters more than raw speed for real-time applications — video calls, online gaming, SSH sessions, VoIP. Under 20 ms is excellent; 20–50 ms is good; 50–100 ms is noticeable lag; above 100 ms creates clear user-visible delay. Jitter is the variation in ping across multiple samples, and high jitter produces the choppy video calls and lag spikes that average-ping numbers fail to predict. A connection with 20 ms average ping but 30 ms jitter performs worse in practice than one with 40 ms average ping and 2 ms jitter — stability beats raw speed for real-time work.

Why Different Speed Tests Produce Different Results

Running the same connection through multiple speed tests (this one, Ookla, Fast.com, your ISP's tool) routinely produces results that differ by 10–50% even within minutes of each other, which frustrates users expecting a single "true" speed. Several legitimate reasons explain this. First, server location: each speed test picks a server to measure against, and the closer that server is to you, the higher the measured speed (less time spent in network transit). This tool uses Cloudflare's edge network which has servers in most major metros; Ookla uses a rotating pool of ISP-operated servers; Fast.com uses Netflix servers specifically. If one test picks a server across the country and another picks one in your city, they'll produce different numbers even though your connection is identical. Second, time of day: residential networks are shared resources that slow down during peak hours (evenings 7–11 PM local time) as neighbors stream Netflix and play games. A test at 2 AM shows maximum speed; the same test at 9 PM may show 40–60% slower results. Third, test size: small tests complete before TCP slow-start ramps up to full speed, undershooting your actual capacity. Large tests measure true sustained throughput more accurately. Fourth, current load: your own other devices streaming or backing up data will eat into measured speed unpredictably. For reliable ISP troubleshooting, run tests at consistent times, on a wired connection, with other devices offline — variability across runs tells you about network conditions rather than about test-tool accuracy.

Using Speed Test Results to Make Decisions

The practical question most users actually want to answer is "is my connection adequate for what I'm doing?" rather than "what's my exact speed?" For video calls, any connection with 5+ Mbps upload, 10+ Mbps download, 50 ms or lower ping, and under 10 ms jitter handles one-on-one HD calls cleanly. For group video calls (5+ participants), roughly double those requirements. For 4K streaming, Netflix recommends 25 Mbps per stream; 8K streaming needs 50+ Mbps. For online gaming, the raw speed matters far less than ping and jitter — a 20 ms ping gaming connection on 50 Mbps beats a 100 ms ping gaming connection on 500 Mbps. For remote work with cloud file sync (Dropbox, Google Drive, OneDrive), sustained upload becomes the bottleneck; 20+ Mbps symmetric is comfortable. For a typical household with 3–4 people simultaneously working, streaming, and gaming, 100 Mbps down / 20 Mbps up is adequate for most use cases and 500 Mbps down / 50 Mbps up is generous. When test results reveal a problem, the troubleshooting order is consistent: restart router and modem first (fixes 30% of issues), switch from Wi-Fi to ethernet to rule out wireless issues, reduce the number of simultaneously-active devices, check for background cloud backups consuming bandwidth, update router firmware, and finally contact your ISP. Each step rules out a class of problems before escalating to the next.

How does this speed test work?+

The test downloads progressively larger files (up to 50 MB in Thorough mode) from Cloudflare's global edge network and measures throughput. It then uploads a 2 MB test payload and performs multiple small requests to measure ping and jitter. All measurements happen in your browser using the Performance API.

Is this speed test accurate?+

Browser-based speed tests provide a good real-world estimate of your connection speed. Results may differ slightly from native app tests due to browser overhead, but are reliable for everyday use and ISP troubleshooting. For maximum accuracy, close other browser tabs and pause downloads while testing.

What is jitter and why does it matter?+

Jitter measures the variation in ping times across multiple requests. Low jitter (under 5 ms) means a stable connection ideal for video calls, gaming, and live streaming. High jitter causes stuttering, lag spikes, and dropped frames even when your average ping looks acceptable.

How much data does the test use?+

Quick mode uses approximately 5 MB down. Standard mode uses about 16 MB down and 2 MB up. Thorough mode uses up to 50 MB down and 2 MB up. If you're on a metered or limited data plan, Quick mode is the most efficient option.

Why are my results different from other speed tests?+

Speed test results depend on many factors: the test server's location relative to you, current network congestion, time of day, Wi-Fi signal quality, and measurement methodology. This test uses Cloudflare's edge servers, which may be closer or farther from you than providers like Ookla or Fast.com.

Does a VPN affect my speed test results?+

Yes, significantly — a VPN routes all traffic through an additional server, encrypts and decrypts data, and adds physical network hops. This typically increases ping by 20–100 ms and reduces download and upload speeds by 10–50%. Test with your VPN both on and off to measure its true impact on your connection.

What is the difference between Mbps and MBps?+

Mbps (megabits per second) is the standard unit for internet speeds — what ISPs advertise and what this test measures. MBps (megabytes per second) is used for file sizes and transfer rates in your operating system. Since 1 byte equals 8 bits, a 100 Mbps connection can transfer files at about 12.5 MBps.

Why is my Wi-Fi slower than a wired ethernet connection?+

Wi-Fi signals are affected by distance, physical obstacles (walls, floors), interference from neighboring networks and household devices, and the age of your router. Ethernet provides a direct, shielded wired connection unaffected by these factors. For the most accurate speed test and best real-world performance, plug in via ethernet whenever possible.

What internet speed do I need for working from home?+

For a single person working from home with video calls, cloud file sync, and web browsing, at least 10 Mbps download and 5 Mbps upload is adequate. For a household with multiple people working or learning from home simultaneously, 50–100 Mbps download and 20 Mbps upload is more appropriate.

How can I improve my internet speed?+

Start by restarting your modem and router, then try connecting via ethernet instead of Wi-Fi. Move your router to a central location away from walls and interference sources. Reduce the number of devices using bandwidth simultaneously and check for background apps consuming data. If none of these helps, contact your ISP to check for local outages or plan upgrades.

Internet Speed Test

What Can You Do?

Test History

How to Use This Calculator

Choose Your Settings

Click Start Test

Review Your Results

Formula & Methodology

Key Terms Explained

Real-World Examples

Home User — Remote Work Check

Gamer — Latency Optimization

Internet Speed Tests: How They Work and What the Numbers Actually Mean

What the Numbers Actually Measure

Why Different Speed Tests Produce Different Results

Using Speed Test Results to Make Decisions

Frequently Asked Questions

Internet Speed Test

What Can You Do?

Test History

How to Use This Calculator

Choose Your Settings

Click Start Test

Review Your Results

Formula & Methodology

Key Terms Explained

Real-World Examples

Internet Speed Tests: How They Work and What the Numbers Actually Mean

What the Numbers Actually Measure

Why Different Speed Tests Produce Different Results

Using Speed Test Results to Make Decisions

Frequently Asked Questions

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