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Controller Diagnostic

Latency Estimator

Test controller input latency and human visual reaction speed in milliseconds. Measure response delay on PS5, Xbox, and Switch controllers online.

Click 'Start Reaction Test' then press any button when box turns GREEN...
No Controller Detected
Click Start Below Ready when box turns emerald green
LAST REACTION TIME 0 ms
BEST (FASTEST) 0 ms
AVERAGE (5 TRIES) 0 ms

Reaction Speed Benchmarks

< 180 ms (Esports Tier)

Top 5% human reaction speed. Ideal for competitive FPS and fighting games.

180 – 240 ms (Average Gamer)

Standard human reaction window. Great performance for casual and ranked play.

> 250 ms (Below Average)

Slower response. Consider switching from Bluetooth to wired USB mode.

How to Get Started

Just three steps to run a complete controller test and understand your controller's health status.

01

Connect Controller

Connect your controller to your computer via USB cable or Bluetooth. If the browser doesn't respond, press any button on the controller to activate the connection.

02

Button Detection

Press each button in the visual interface and confirm the corresponding area lights up on screen. This helps troubleshoot unresponsive or double-clicking buttons.

03

Sticks & Vibration

Rotate the sticks to check linearity and drift issues; click the vibration test button to feel if the left and right motor feedback is working properly.

What would you like to do next?

Select a diagnostic calibration suite, deadzone analyzer, or high-frequency overclock tool.

Fix

Repair & Calibration

Calibrate zero-point offsets or follow step-by-step repair guides.

WebHID Calibration
Optimize

Game Deadzones

Calculate exact radial vs axial deadzone overlays for Fortnite, Apex, & COD.

Deadzone Calculator
Telemetry

Overclock & Circularity

Verify true hardware polling Hz stability and statistical circularity grades.

Hz & Circularity Tools

Test your controller polling rate in Hz

Check if your controller reports at 125Hz, 250Hz, 500Hz, or 1000Hz over USB.

Check Polling Rate

Related Diagnostic Tools

Polling Rate Checker

Measure input report frequency in Hz.

Stick Drift Tester

Test 0.1% stick drift precision.

Button Tester

Test button ghosting and click speed.
Play & Practice

Practice what you just tested

Turn your test results into skill. These arcade games train the exact inputs you just measured — drift, buttons, triggers, D-pad and reaction time.

Browse all games
+75 XP

Quick Draw

Press any button the instant the signal turns green. Reaction timer.

Play
+75 XP

Beat Drop

Tap face buttons in time as notes cross the hit line.

Play

How Controller Input Latency Impacts Gaming Performance

Total latency equals the sum of human visual reaction time, controller polling delay, OS processing overhead, and display lag. Reducing controller latency by 5ms gives players a distinct advantage in high-stakes firefights.

3 Ways to Reduce Controller Latency

  • Switch to Wired Mode: Connect via high-speed USB-C cable rather than standard Bluetooth.
  • Overclock Polling Rate: Use USB polling rate utility software to boost report frequency to 1000Hz (1ms).
  • Enable Game Mode on Display: Turn on low-latency Game Mode on your monitor or TV to cut display lag.

Frequently Asked Questions

Everything you need to know about testing your controller.

How do I test my controller input latency?

Connect your controller above, click Start Reaction Test, and press any button immediately when the screen turns emerald green. The tool measures your reaction delay in milliseconds.

What is a good controller reaction latency time?

Average human visual reaction speed is between 190ms and 250ms. Competitive gamers using 1000Hz overclocked controllers regularly achieve response times under 170ms.

Does wireless Bluetooth add input latency compared to USB cable?

Yes. Bluetooth adds 4ms to 8ms of input delay compared to a wired USB connection. Overclocking USB polling rates to 1000Hz minimizes hardware latency to sub-1ms levels.

How this test works & its limits
  • This test reads your controller through the browser's standard Gamepad API — no drivers, no installs, nothing leaves your device.
  • Readings depend on connection mode: Bluetooth reports at lower rates than USB. Compare like-for-like (wired vs wired).
  • We measure the input reaching the browser — display lag and game-engine queues are outside this test's view.
  • A clean reading now does not guarantee no drift in-game: deadzones differ per game, and wear develops over time. Use the Drift Timeline to track yours.
  • This is a diagnostic, not a hardware-lab certification. For repair or RMA decisions, confirm with a second run or second tool.
Read the full methodology
100% Client-Side

All Gamepad API data stays in your browser. Zero tracking or data collection.

Instant Results

No downloads, plugins, or software installation needed. Works instantly.

Free Forever

No paywalls, subscription requirements, or hidden usage limits.