Powerline Adapter Throughput Calculator
The box says "up to 2000Mbps" - your actual speed through old house wiring says otherwise. Enter your adapter's advertised speed plus your wiring age and distance to get a realistic estimate. Nothing uploaded.
Results
This is a rough estimate based on typical wiring degradation patterns. Actual results vary by adapter brand, chipset generation, and the specific wiring in your home.
Powerline adapter throughput and wiring factors
Why advertised speeds never match real-world throughput
Powerline adapter marketing claims can be misleading. A "2000 Mbps" adapter advertises the theoretical maximum under laboratory conditions - clean, short runs on modern wiring with no interference. Real homes have much noisier electrical environments: refrigerators, air conditioners, switching power supplies, and other devices all generate electromagnetic noise that degrades the powerline signal. Additionally, marketing claims often combine speeds across multiple channels or aggregated link rates that don't translate to usable throughput. Expect 20-50% of advertised speed in best-case scenarios; older wiring or long distances reduce this further. A 2000 Mbps adapter might deliver 300-500 Mbps real throughput in a typical home.
How wiring age and distance degrade signal quality
Modern house wiring (post-2000) uses twisted pairs and better shielding, which reduces signal attenuation and noise coupling. Pre-1980 wiring (especially knob-and-tube or aluminum) was not designed for high-frequency communication and introduces significant signal loss. Distance from the breaker panel also matters - each 10 meters of cable introduces additional attenuation. Connections on different circuits or different panels are even worse because the signal must couple through the main breaker and transformer. Finally, circuit loading (how many appliances are drawing power) affects the noise floor, with heavier loads creating more noise that masks the powerline signal.
FAQ
Should I use multiple adapters or just one?
One pair (two adapters) is simpler and avoids cascading, where signals degrade as they hop through multiple adapter pairs. If you need coverage in distant parts of your home, one pair on different circuits is acceptable if wiring is modern, but throughput will suffer. Ethernet over the longest possible distances is more reliable.
Can I get gigabit speeds with powerline adapters?
Only in rare cases with modern wiring, same circuit, short distance, and no interference. Most homes see 100-300 Mbps sustained throughput with quality adapters. If you need gigabit performance, run Ethernet cable or upgrade your WiFi instead. Powerline is a compromise technology for situations where cable is impractical.
Does the age of my adapter chipset matter?
Yes. Newer chipset generations (AV2, OFDM-based) are more efficient at handling noise and interference, and older adapters based on HomePlug AV1 perform worse in noisy environments. If your home has lots of electrical noise or older wiring, upgrading to a newer generation adapter can significantly improve reliability, even if maximum speeds don't change much.