Scrolls Per Second (SPS) Test
Count how many scroll wheel events your mouse delivers per second (SPS). Live event counter with countdown timer and peak 1-second rate analysis. Free.
The Scrolls Per Second (SPS) test counts the frequency of distinct wheel event packets dispatched by your browser per second. Standard stepped mouse wheels deliver 20 to 50 SPS during rapid finger flicking, while unlocked free-spinning wheels can achieve 100+ SPS.
Scrolls Per Second (SPS) Counter
Flick Scroll Wheel to Measure SPS
The 5-second measurement starts automatically upon receiving your first scroll event.
What Is Scrolls Per Second (SPS)?
Scrolls Per Second (SPS) is the wheel equivalent of CPS (Clicks Per Second). Rather than measuring cumulative pixel distance, it isolates the raw packet frequency of the rotary encoder.
In games like Minecraft, Apex Legends, and Counter-Strike, players bind weapon selection or bunny-hopping to the scroll wheel. A high SPS score ensures that jumping inputs are delivered on the exact tick you hit the ground.
SPS testing directly evaluates encoder responsiveness and reveals whether your browser or operating system is dropping wheel packets.
How to Measure Your SPS
Choose 5, 10, 15, or 30 seconds for your event frequency test.
The timer begins on your first wheel movement. Spin the wheel continuously.
Use rapid finger brush strokes across the wheel rubber to keep the encoder spinning.
Track your real-time event counter and peak 1-second rolling SPS record.
Examine average SPS, total events delivered, and consistency rating.
How to Read Your Results & Performance Benchmarks
Compare your observed diagnostic measurements against verified hardware standards.
| SPS Score | Wheel Mechanism | Performance Tier | Application Suitability |
|---|---|---|---|
| 10 - 25 SPS | Stiff Stepped Wheel | Standard | Everyday web reading, precise weapon switching. |
| 25 - 55 SPS | Fast Gaming Stepped Wheel | Competitive | Bunny-hopping in CS2/Apex Legends, rapid item cycling. |
| 55 - 90 SPS | Light Detent / Modded Wheel | Pro Gamer | High-tier movement tech, rapid bridging. |
| 90+ SPS | Unlocked Free-Spin Wheel | Infinite Spin | Logitech MX Master or G502 unlocked inertial spin. |
SPS Troubleshooting
Cause: Browser event loop throttling or high OS background CPU load.
Cause: Worn, greasy, or smooth rubber ring on the mouse wheel.
Browsers dispatch WheelEvent objects upon receiving window messages from the OS mouse driver. At extremely high rotational speeds, operating system event coalescing may aggregate multiple physical encoder steps into a single event with larger delta, slightly lowering raw event counts while preserving distance.
Frequently Asked Questions
What is SPS in mouse testing?
What is a good SPS score?
How do I scroll faster for SPS testing?
Related Hardware & Input Diagnostics
Cross-verify your peripherals with our full suite of local, private browser tests.
Click Speed Test (CPS)
Measure clicks per second (CPS) and clicks per minute (CPM) across timed sessions with real-time speed rank.
Scroll Wheel Diagnostic
Guided 4-phase protocol to diagnose scroll wheel reverse jitter, irregular gaps, burst delivery, and encoder skips.
Scroll Speed Test
Measure scrolling velocity, events per second, and peak speed with strict delta unit separation.
100-Meter Scroll Challenge
Put your finger stamina to the test in a fast-paced CSS-pixel distance challenge.