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RealTimeSpeed

Fiber Optic

Fiber Speed Test

Fiber optic internet is the fastest and most stable connection available. But are you actually getting the speeds you're paying for? Our continuous monitor verifies your fiber performance over time — not just a single optimistic burst.

SYSTEM IDLE
CONNECTING...
DOWNLOAD RATE
126.1
Mbps
MB/s
RTS SCORE
--
Score
UPLOAD RATE
60.1Mbps
GLOBAL LATENCY
0.0MS
NETWORK STABILITY LOG

The Fiber Optic Advantage

Fiber optic internet transmits data as pulses of light through glass strands, unlike cable internet which uses electrical signals through copper wires. This fundamental difference gives fiber three critical advantages: symmetrical speeds (your upload matches your download), lower latency (fewer electronic hops), and zero electromagnetic interference (immune to weather, nearby electronics, and signal degradation over distance).

For gamers, this means consistently lower ping and jitter. For remote workers, it means reliable video calls with strong upload performance. For everyone, it means the speed you pay for is the speed you actually get.

Fiber vs. Cable: Side-by-Side Comparison

MetricFiber (FTTH)Cable (DOCSIS)
Download SpeedUp to 10 GbpsUp to 1.2 Gbps
Upload SpeedSymmetrical10–35 Mbps typical
Typical Latency5–15ms15–40ms
Shared BandwidthDedicated lineShared neighborhood node
Weather ImmunityFully immuneSusceptible to interference

For a deeper technical analysis, read our full Fiber vs. Cable latency comparison.

How to Properly Test Your Fiber Speed

01

Connect via Ethernet. WiFi will always show lower speeds than your fiber plan is capable of. For an accurate test, plug a Cat6 cable directly from your router or ONT into your computer.

02

Close background applications. Cloud backups, software updates, and streaming services all consume bandwidth. Pause them before testing to see your connection's true capacity.

03

Check your hardware. Your Ethernet adapter, cable, and router all need to support gigabit speeds. A Cat5 cable caps at 100 Mbps. An old laptop NIC might cap at 100 Mbps. These bottleneck the test.

04

Run the continuous test for 5+ minutes. A single snapshot test can look perfect. Running our monitor continuously reveals stability patterns — does your speed dip at certain times? Does it fluctuate or stay consistent?

Fiber Speed Test FAQ

Am I actually getting the fiber speed I'm paying for?
Run this test with a direct Ethernet connection to your fiber ONT (Optical Network Terminal) or router. If your speed matches your plan on Ethernet but is lower on WiFi, the bottleneck is your wireless setup, not your fiber connection. Most fiber plans deliver 90–100% of the rated speed on a wired connection.
Why is my fiber connection slow?
Common causes include: using WiFi instead of Ethernet, an outdated router that can't handle gigabit speeds (especially the WiFi radio), a Cat5 Ethernet cable instead of Cat5e/Cat6, software running in the background consuming bandwidth, or your ISP's ONT needing a reboot. Always test wired first to isolate the issue.
Is fiber optic internet faster than cable?
Yes, in almost every meaningful way. Fiber offers: symmetrical upload/download speeds (cable upload is typically 10–20x slower), lower latency (light through glass vs. electricity through copper), zero susceptibility to electromagnetic interference, and no shared neighborhood bandwidth. Fiber is the gold standard of internet connections.
Can my router handle gigabit fiber?
Many older routers cannot. To utilize a gigabit fiber plan, you need a router with: a Gigabit WAN port (not 100 Mbps), a processor fast enough to route at gigabit speeds, and WiFi 6 or newer if you want fast wireless. ISP-provided routers are often adequate for the plan they come with, but upgrading can improve WiFi coverage and features.
Is 'fiber-to-the-home' the same as 'fiber internet'?
Not necessarily. Some ISPs market 'fiber internet' when fiber only reaches the neighborhood node, with the last mile to your home still using copper cable (called FTTC or HFC). True Fiber-to-the-Home (FTTH) means the fiber optic cable runs directly into your house, providing the lowest latency and highest reliability.

Continue Reading

What Is Latency? Everything You Need to Know
Network Basics

What Is Latency? Everything You Need to Know

What is Jitter? A Simple Guide to Network Stability
Network Basics

What is Jitter? A Simple Guide to Network Stability

Download Speed vs Upload Speed: What Matters More?
Network Basics

Download Speed vs Upload Speed: What Matters More?

Is your connection unstable?

Don't just guess. Use our real-time monitor to see exactly what's happening with your download, upload, and ping variance right now.

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