Video Duration from Frames Calculator
Video is just a sequence of still images, called frames, shown quickly enough to read as smooth motion, and the frame rate is how many of those frames play each second. That makes converting a frame count into a running time a simple division: the duration in seconds equals the number of frames divided by the frame rate in frames per second. This calculator does exactly that. It is useful any time you know how many frames a clip contains, for example from an editing timeline, a render queue or a camera buffer, and you need to know how long it will actually play. Frame rate matters because the same number of frames plays back faster at a higher rate and slower at a lower one: 3,600 frames lasts 150 seconds at 24 frames per second but only 120 seconds at 30. Common rates are 24 for film, 25 and 30 for television, and 50 or 60 for smoother sport and gaming footage, and you can enter fractional rates such as 29.97 for broadcast formats. Every figure here is computed deterministically from the duration equals frames divided by frame rate relationship shown below, with a worked example that reconciles exactly to the calculator so you can follow each step.
Clip duration is the frame count divided by the frame rate: duration = frames / fps. A clip of 3,600 frames at 24 fps lasts 150.00 seconds (2 minutes 30 seconds).
Duration formula
duration (s) = frames / fps
frames = total number of frames
fps = frame rate in frames per second
minutes = duration / 60
Frame rate is frames per unit time, so dividing the total frames by the frame rate returns the time those frames occupy. A higher frame rate yields a shorter duration for the same frame count.
Worked example
A clip contains 3,600 frames recorded at 24 frames per second.
- Divide frames by frame rate: 3,600 / 24.
- Duration = 150 seconds.
- In minutes: 150 / 60 = 2.5 minutes, or 2 minutes 30 seconds.
The duration is 150.00 seconds. These are the calculator's default inputs, so the result above matches the widget exactly.
Common frame rates
| Frame rate | Typical use | 3,600 frames last |
|---|---|---|
| 24 fps | Film and cinema | 150.00 s |
| 25 fps | PAL television | 144.00 s |
| 30 fps | NTSC television, web | 120.00 s |
| 60 fps | Sport, gaming | 60.00 s |
Measurement of time and frequency: US National Institute of Standards and Technology.
Video duration calculator: frequently asked questions
How do you convert frames to time?
Divide the number of frames by the frame rate in frames per second. The result is the duration in seconds. For example, 3,600 frames at 24 frames per second is 3,600 divided by 24, which is 150 seconds. This works because frame rate is simply how many frames are shown each second.
What is frame rate?
Frame rate is the number of still images, called frames, shown per second to create the illusion of motion. It is measured in frames per second (fps). Common rates include 24 fps for film, 25 fps and 30 fps for television, and 50 or 60 fps for smoother motion in sport and games. Time is the reciprocal relationship: duration equals frames divided by frame rate.
Why does the same frame count give different durations?
Because duration depends on the frame rate. A fixed number of frames plays back faster at a higher frame rate and slower at a lower one. For instance, 3,600 frames lasts 150 seconds at 24 fps but only 120 seconds at 30 fps, since more frames are shown each second at the higher rate.
What about drop-frame timecode at 29.97 fps?
Some broadcast formats run at 29.97 fps rather than exactly 30, and use drop-frame timecode to keep the displayed time aligned with real elapsed time. This calculator uses the plain duration equals frames divided by frame rate relationship, so enter 29.97 as the frame rate if your footage uses that exact rate.
How do I convert the result into minutes?
Divide the duration in seconds by 60 to get minutes. For example, 150 seconds is 150 divided by 60, which is 2.5 minutes, or 2 minutes and 30 seconds. This calculator reports the duration in seconds, which you can then convert to minutes or to a timecode as needed.
Official sources
- Time and frequency measurement standards: US National Institute of Standards and Technology (NIST). As at 25 June 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 25 June 2026. See our methodology. This is general information, not financial, tax, legal or investment advice.