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FPS Test — Check Your Frame Rate Online

Testes precisos no navegador para FPS, monitores, nitidez de movimento e qualidade de painel. Sem downloads, 100% privado.

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Ready to Test FPS

Measures browser graphics frame pacing, delivery rate, 1% lows, and render stability.

Duration:

Workload:

Target Hz:

Real-Time Timeline

(Buffered 150 Frames)

Time →

240 FPS

Current FPS

—

Smoothed window

Average FPS

—

0 frames

Frame Time

—

Delta interval

Frame Spikes

>1.5x baseline jitter

Fundamental Concepts

FPS vs Refresh Rate: Understanding the Difference

While FPS (Frames Per Second) and Refresh Rate (Hz) are closely related, they describe two separate components of your rendering pipeline:

FPS (Frames Per Second)

The rate at which your graphics processor (GPU), CPU, and browser engine produce new visual frames. A dynamic value that fluctuates based on scene complexity, computational workload, and driver overhead.

Refresh Rate (Hz)

The physical frequency at which your monitor panel illuminates and scans out a full frame buffer onto screen pixels. A fixed hardware limit (e.g., 60Hz, 144Hz, 240Hz) unless modulated by Variable Refresh Rate (G-Sync/FreeSync).

Diagnostic Telemetry

Why 1% Lows Reveal Real-World Micro-Stutter

A high average FPS number can be deceptive. If a system averages 144 FPS across 30 seconds but experiences occasional 50ms frame drops, the human eye will perceive jarring stutter despite the high average score.

How 1% Low is Calculated

FPSRate collects all individual frame intervals, sorts them in ascending order, isolates the slowest 1% of frame times, and computes their effective frame rate. If your 1% low remains within 10–15% of your average FPS, your graphics pipeline is delivering exceptionally smooth motion.

FPS to Frame Time Conversion Reference

Every target frame rate corresponds to an exact frame budget. If your system takes longer than this duration to render a frame, dropped frames and stutters will occur.

Frame Time Reference Matrix

Formula: 1000 ÷ FPS

Target Frame Rate	Exact Frame Time	Tier	Operational Context
30 FPS	33.33 ms	Console / Cinematic	Baseline interactive frame rate
60 FPS	16.67 ms	Standard Display	Universal desktop & mobile standard
90 FPS	11.11 ms	VR / Mobile High-Hz	Smooth motion threshold
120 FPS	8.33 ms	High Refresh Rate	Half the frame latency of 60Hz
144 FPS	6.94 ms	Competitive Gaming	Standard esports monitor target
165 FPS	6.06 ms	Fast Esports	Enhanced motion clarity
240 FPS	4.17 ms	Ultra High Refresh	Near-instantaneous frame delivery
360 FPS	2.78 ms	Extreme Pro Esports	Sub-3ms frame rendering pipeline

Browser Diagnostic Boundaries & Limitations

Browser-based frame rate tests measure presentation timing via the HTML5 requestAnimationFrame loop and operating system compositor. Please keep in mind:

V-Sync Cap: Browsers lock frame delivery to your active desktop refresh rate to prevent tearing unless hardware acceleration flags are modified.
Compositor Overhead: Window managers (DWM on Windows, Quartz on macOS, Wayland on Linux) introduce small scheduling variances.
Tab Throttling: If this tab is minimized or hidden, browsers drop frame cadence to 1 FPS to conserve power.
Not a 3D Game Benchmark: This test evaluates 2D/Canvas frame pacing and browser rendering capability, not AAA DirectX 12/Vulkan game performance.

Tips for Optimal Measurement Reliability

1. Close Heavy Background Apps

High CPU or GPU background workloads (video rendering, screen recording) can induce artificial frame spikes.

2. Enable Fullscreen Mode

Running the test in Fullscreen gives the browser exclusive composition priority and minimizes window manager latency.

3. Connect Power (Laptops)

Battery saver modes on laptops often throttle monitor refresh rates from 120Hz/144Hz down to 60Hz.

4. Avoid Switching Tabs

Keep the test window active for the full 30-second duration for an uninterrupted sample distribution.

Perguntas Frequentes

What is an online FPS test?

An online FPS test is a browser-based diagnostic that measures how many visual animation frames your device renders and displays per second. It tracks requestAnimationFrame timing against high-resolution microsecond clocks to assess frame delivery speed and micro-stutter.

How does FPSRate measure my frame rate?

FPSRate registers an animation loop with the browser compositor. For every delivered frame, performance.now() records a microsecond timestamp. The delta interval between consecutive frames allows calculating instantaneous FPS, mathematical rolling averages, and 1% low percentile distributions.

Why is my FPS locked at 60 FPS on a 144Hz or 240Hz monitor?

If your FPS is capped at 60, check: (1) your Windows/macOS display settings to ensure 144Hz/240Hz is selected, (2) browser hardware acceleration is enabled in settings, and (3) you are not running on battery power with an aggressive power-saving plan.

What is a 1% Low FPS and why is it important?

1% Low represents the average frame rate of the slowest 1% of all recorded frames. While average FPS indicates overall speed, 1% Low isolates frame-time spikes that cause noticeable visual hitching or micro-stutter.

Does this test evaluate my GPU gaming performance?

This test measures 2D Canvas rendering cadence, browser graphics pipeline efficiency, and display synchronization. While it exercises your GPU, it is not a heavy 3D benchmark (like 3DMark or native game benchmarks) and should be used to verify display synchronization and frame pacing.

Does the FPS test work on mobile phones and tablets?

Yes. Modern iOS and Android devices with 60Hz, 90Hz, or 120Hz ProMotion displays are supported. The test automatically scales to your mobile screen viewport.