What is Frame Rate? FPS, Refresh Rate & How to Test It

FrameRateTest.org · February 22, 2025

Frame rate is the number of still images a screen shows every second to build the illusion of motion. It is measured in frames per second, written as FPS. A higher frame rate means more images arrive each second, which the eye reads as smoother, more fluid movement. This guide explains what frame rate is, how it differs from refresh rate, how the eye perceives smoothness, which common values suit film and gaming, and what limits the numbers your hardware can reach. You can measure your own display in seconds with the free frame rate test on this site.

What Is Frame Rate (FPS)?

A frame is a single, complete image. Motion on any screen is an illusion assembled from a rapid sequence of these frames. When the images change quickly enough, the brain blends them into continuous movement. Frame rate simply counts how many frames appear in one second. A clip at 60 FPS shows sixty separate images every second. A clip at 30 FPS shows half as many, so each image stays on screen twice as long.

The idea applies wherever a screen displays motion: cinema, television, streaming video, animation, and video games. In games the number is dynamic. Your graphics card renders each frame on demand, so the frame rate rises and falls with the complexity of the scene. In recorded video the frame rate is usually fixed when the file is captured or encoded, so it stays constant during playback. Either way, the same rule holds. More frames per second produce smoother motion, clearer detail while objects move, and, in games, faster visual feedback to your inputs. The number is a rate, not a resolution, so it says nothing about image sharpness on its own. For a closer look at how the measurement works and how it is calculated, see our guide on frames per second.

Frame Rate vs Refresh Rate (Hz)

Frame rate and refresh rate are easy to confuse because both count events per second. They are not the same thing. Frame rate is how many frames your computer produces and sends to the display, measured in FPS. Refresh rate is how many times per second the monitor physically redraws its picture, measured in hertz (Hz). One is an output from your hardware and software. The other is a fixed property of the panel itself.

The two interact directly, and the lower number sets the limit. A monitor running at 60 Hz can only show sixty new images per second. If your graphics card renders 200 FPS, the screen still displays sixty, and the surplus frames are discarded. If instead your hardware manages only 40 FPS on a 144 Hz panel, the display has nothing new to show on many of its cycles, so it repeats frames. To benefit from a high frame rate you need both a capable GPU and a monitor with a matching refresh rate, such as 120 Hz, 144 Hz, or 240 Hz. If you are unsure what your panel supports, our guide on how to check your refresh rate walks through it. A mismatch between the two numbers is also the classic cause of screen tearing, where the display shows parts of two frames at once. You can reproduce and study that artifact with the screen tearing test.

How the Human Eye Perceives Smoothness

The human visual system has no fixed frame rate. It works as a continuous process rather than a camera with a shutter, so there is no single value where perception stops. Sensitivity instead depends on what you are looking at. Motion speed, contrast, brightness, and the size of moving objects all change how many frames you can distinguish. This is why claims of a hard "eye limit" are misleading.

A few general patterns hold for most viewers. Below 24 FPS, motion begins to look like a slideshow. Around 30 FPS, movement reads as continuous but can stutter during fast pans. At 60 FPS most everyday motion looks smooth and feels responsive. The jump from 60 to 120 FPS is clearly visible in fast content, especially in games and quick camera sweeps. Beyond 120 FPS the gains shrink, though many people still notice the difference up to 240 FPS in high-speed scenes. Smoothness is not only about the raw count. It also depends on motion clarity, the sharpness of an object as it moves across a sample-and-hold LCD. On these panels each frame is held static until the next one arrives, and your eye tracks the moving object, which smears its edges into perceived blur. Higher frame rates shorten how long each frame is held, so they reduce that blur. You can observe the effect directly with the motion blur test.

Common Frame Rates and What They Suit

Different frame rates suit different tasks. Film has kept the same standard for roughly a century, while competitive gaming pushes hardware as far as it will go. The table below summarizes the most common targets and where each one fits.

For most users, 60 FPS is the target that balances smoothness against affordable hardware. Drop below it and motion feels choppy. Move above it and you need both a higher-refresh monitor and a stronger graphics card to keep the frames flowing. Competitive players chase 144 FPS and beyond because the lower latency and clearer motion translate into a measurable edge in fast-twitch titles. The right target depends on your genre, your display, and your budget. Our guide on frames per second in gaming covers those trade-offs in detail.

What Limits Your Frame Rate

Frame rate is the output of a pipeline, and the slowest stage sets the ceiling. Several components can become that bottleneck, and identifying the right one is the key to fixing low performance.

GPU

The graphics card does the heavy work of drawing each frame. At high resolutions, and with demanding effects such as ray tracing, anti-aliasing, and detailed textures, the GPU is usually the limiting factor. Lowering these settings is the fastest way to lift frame rate.

CPU

The processor prepares every frame before the GPU draws it, handling physics, game logic, and draw calls. In simulation-heavy games, and at lower resolutions, the CPU can cap your frame rate even when the graphics card still has headroom. This condition is known as being CPU-bound.

Game engine and optimization

Software matters as much as hardware. A poorly optimized engine, a memory leak, or an unpatched bug can hold frame rate below what your components should deliver. Driver updates and game patches often recover the lost performance without any new parts.

VSync and frame caps

VSync deliberately limits frame rate to the refresh rate to stop tearing. It trades a little input lag for a clean, aligned image. Frame-rate caps set by you, by the game, or by a variable-refresh technology such as G-Sync or FreeSync work the same way. These are intentional limits, not faults, and they explain why a powerful system may sit exactly at 60 FPS.

Frame Rate vs Frame Time and Consistency

Average frame rate is a useful headline, but it hides an important detail: consistency. Frame time measures how long each individual frame takes to render, in milliseconds. A steady stream of evenly spaced frames feels smooth. An uneven stream feels like stutter, even when the average FPS looks high. This is why two systems that report the same average can feel very different in practice.

The relationship between the two is simple. Frame time is the inverse of frame rate. If frames arrive at a perfectly even pace, 60 FPS equals 16.7 ms per frame and 120 FPS equals 8.3 ms. Problems appear when frame times spike. A single frame that takes 50 ms while its neighbors take 16 ms produces a visible hitch, whatever the per-second average claims. The table below pairs each common frame rate with the frame time it implies under even pacing.

Because averages can hide these spikes, consistent frame pacing often matters more than a high peak. When frames arrive unevenly you perceive stutter and judder, and no amount of raw FPS fully masks it. You can see how uneven pacing looks and feels using the stutter test, which makes hitches easy to spot before you chase a bigger average number.

Frequently Asked Questions

Is 60 FPS good?

Yes. 60 FPS is the widely accepted baseline for smooth, responsive motion in gaming, video, and general use. It pairs naturally with the 60 Hz refresh rate found on most standard monitors. Competitive players aim higher, but for the vast majority of tasks 60 FPS feels fluid and comfortable.

Is a higher frame rate always better?

Higher frame rates give smoother motion and lower input lag, but only up to your monitor's refresh rate. Rendering 200 FPS on a 60 Hz screen wastes power and generates heat without any visible benefit. Match your target frame rate to the panel you actually own.

What is the difference between FPS and Hz?

FPS counts the frames your computer sends to the screen each second. Hz counts how many times the screen can redraw itself each second. Your effective smoothness is limited by whichever of the two numbers is lower.

How do I test my frame rate?

The quickest method is a browser-based tool. The frame rate test on this site measures your live FPS instantly, with no download or install, so you can confirm what your display is really delivering.

Related tests and guides

• Frame rate test — measure your display's live FPS right in the browser.
• What is my refresh rate? — find and confirm your monitor's Hz.
• Frames per second in gaming — how FPS affects play and competitiveness.
• Motion blur test — check how sharp moving objects stay on your screen.
• Stutter test — spot uneven frame pacing and judder.