What is frame rate? FPS explained for video

Frame rate, measured in frames per second (fps), is the frequency at which consecutive individual images are captured, encoded, and displayed to produce the visual illusion of continuous motion. In digital video, standard frame rates range from 24 fps (the global benchmark for theatrical cinema) to 30 fps and 60 fps for television and web streaming, up to 120 fps for high-speed sports and interactive gaming.

While higher frame rates generally produce sharper, more responsive visuals in software interfaces and video games, higher numbers are not automatically better for narrative cinema. Understanding how frame rate interacts with display refresh rates, shutter speed, and human visual perception helps you appreciate why movies are shot the way they are—and how to get the cleanest playback on your screen.

Animation

24 fps on a 60 Hz screen vs a 120 Hz screen

60 Hz screenframe held 3 refreshes

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120 Hz screen (ProMotion)frame held 3 refreshes

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What is the difference between frame rate (fps) and refresh rate (Hz)?

One of the most frequent points of confusion in digital media is the distinction between frame rate and refresh rate:

• Frame Rate (FPS): A property of the media content or source file. It describes how many distinct images were captured by a camera or rendered by a graphics engine in one second. A 24 fps movie delivers 24 still pictures every second.
• Refresh Rate (Hertz, Hz): A property of the physical display panel. It measures how many times per second the monitor illuminates its backlight and redraws the state of its pixels. A standard computer display refreshes at 60 Hz (60 times per second), while a modern Apple ProMotion screen reaches 120 Hz.

When the frame rate of your video file does not divide evenly into the refresh rate of your monitor, motion playback suffers. For example, playing a 24 fps movie on a rigid 60 Hz monitor forces an uneven 3:2 pulldown: the screen displays the first frame for 3 refreshes (50 ms) and the second frame for 2 refreshes (33.3 ms). This timing disparity causes horizontal camera pans to hitch rhythmically, a flaw known as telecine judder (learn more in our guide to 24 fps judder on 60 Hz screens).

Conversely, on modern screens comparing 120Hz vs 60Hz displays, a 120 Hz display can show every 24 fps frame for exactly 5 refreshes (120 ÷ 24 = 5.0), eliminating judder entirely without changing the native frame rate of the movie.

Where did common frame rates come from?

The specific frame rates used across modern media are not arbitrary; they are the legacy of 20th-century technical compromises across film chemistry, electrical grids, and color television:

• Why 24 fps for Cinema? When synchronized sound film emerged in 1927, studios needed a standardized camera and projector speed to ensure audio pitch remained consistent across theaters. 24 fps was chosen as the lowest speed that delivered intelligible audio fidelity from optical soundtracks while minimizing expensive 35mm physical film stock consumption. Explore the full history in our article on why movies are 24 fps.
• Why 23.976 fps? When color broadcasting launched in the US in 1953, engineers slowed black-and-white 30 fps broadcasts down by 0.1 percent (1,000 ÷ 1,001) to 29.97 fps to prevent color carrier signals from humming over audio channels. Transferring 24 fps films to videotape applied that same 0.1 percent slowdown, yielding 23.976 fps (explore our detailed analysis of 23.976 vs 24 fps).
• Why 25 and 50 fps? European electrical grids operate at 50 Hz, leading PAL engineers to build 50 fields (25 frames) per second television systems.

What is the 180-degree shutter rule and why does motion blur matter?

In digital cinematography, the visual texture of motion is shaped not only by frame rate, but by shutter speed.

On traditional film cameras, a rotating semi-circular disc shutter spun in front of the film gate, exposing the film strip while the gate was open and shielding it while the claw pulled down the next frame. The standard opening angle was a half-circle: 180 degrees.

Under the 180-degree shutter rule, a camera’s exposure duration is set to half the duration of a single frame:

Shutter speed = 1 ÷ (2 × Frame rate)

• At 24 fps, each frame lasts 1/24 of a second (41.67 ms). A 180-degree shutter exposes the sensor for 1/48 of a second (20.83 ms).
• At 60 fps, each frame lasts 1/60 of a second (16.67 ms). A 180-degree shutter exposes the sensor for 1/120 of a second (8.33 ms).

That 1/48-second exposure time creates natural optical motion blur. When an actor swings their fist or a car accelerates past the camera, moving edges blur slightly across the frame.

When projected at 24 fps, the human visual cortex bridges these motion-blurred images through persistence of vision, blending them into an organic visual sweep. If you shoot 24 fps with a fast shutter (such as 1/500 of a second, used in the combat scenes of Saving Private Ryan), motion blur disappears, creating an aggressive, staccato strobing effect.

Why is a higher frame rate not always better for movies?

In video games, higher frame rates provide clear advantages: running a game at 120 fps cuts input latency in half compared to 60 fps and keeps fast-moving targets sharp.

In narrative storytelling, however, increasing frame rates to 48 fps, 60 fps, or 120 fps often disrupts the viewer’s psychological immersion.

When a movie is shot or interpolated at high frame rates, two things happen:

1. Motion Blur Disappears: Individual frames are exposed for much shorter fractions of a second, keeping every edge sharp.
2. The “Soap Opera Effect” Takes Over: Because commercial television soap operas, news broadcasts, and home camcorders were historically recorded at 50 or 60 fields per second on inexpensive video cameras, audiences subconsciously associate high-frame-rate motion with low-budget live television.

When director Peter Jackson released The Hobbit: An Unexpected Journey (2012) in High Frame Rate (HFR) 48 fps, critics and audiences widely complained that the film lost its fairy-tale texture. Costumes looked like synthetic theater fabric, makeup lines were clearly visible, and fantasy sets appeared like painted wooden props on an English soundstage. The hyper-clarity reduced the poetic suspension of disbelief that 24 fps provides.

Learn more about this psychological phenomenon in our breakdown of the soap opera effect.

Which frame rate should you choose for recording or streaming?

If you create video or configure camera settings, choose your frame rate based on the intended emotional tone and viewing medium:

• 24 fps (or 23.976 fps): The standard for narrative short films, cinematic documentaries, music videos, and commercial advertisements. Delivers the classic film look with natural motion blur.
• 30 fps (or 29.97 fps): The standard for corporate presentations, software tutorials, talking-head YouTube videos, and standard television news broadcasts.
• 60 fps: The standard for live sports, gaming streams, action camera recordings, and tech walkthroughs where smooth motion clarity is paramount.
• 120 fps or higher: Used for high-speed camera capture to produce dramatic slow-motion playback when conformed down to 24 fps or 30 fps in post-production.

How Apple Silicon displays handle different video frame rates

Modern Apple Silicon Macs excel at displaying diverse video frame rates without visual compromises.

On MacBook Pro models featuring Liquid Retina XDR displays, Apple ProMotion technology dynamically modulates display timing between 24 Hz and 120 Hz:

• When playing a 24 fps film in full screen, macOS can clock the panel to 24 Hz (1:1) or 48 Hz (2:2).
• When playing a 60 fps video, the display synchronizes at 60 Hz or 120 Hz (2:2).
• When reading text or editing documents, it ramps down to conserve battery power.

Furthermore, macOS allows users to lock external reference monitors to dedicated fixed refresh rates—including 47.95 Hz, 48.00 Hz, 50.00 Hz, and 60.00 Hz—directly within System Settings.

If you ever wish to convert a low-frame-rate video into high-frame-rate motion for sports or animated content, you can also explore software solutions like motion interpolation to bridge frames cleanly in real time.

Mastering motion clarity on your screen

Frame rate is the foundation of digital video. From the century-old 24 fps standard born of early sound film economics to the 120 fps displays of modern Apple Silicon computers, each frame rate serves a distinct narrative and technical purpose.

By understanding the math behind frames per second and pairing your video with the right display refresh rate, you ensure that every movie, broadcast, and stream plays with the exact visual texture its creators intended.