Frame Rate Calculator
Frames, Duration, and Frame Rate Are Interlocked
Frame rate, clip duration, and total frame count are three views of the same relationship — know any two and the third follows directly. Editors run into this constantly: matching a frame count from an animation export, figuring out how long a rendered image sequence will play back, or confirming a camera's actual captured frame rate from a known clip length and frame count.
The Formulas
Frames = FPS × Duration(s)
Duration(s) = Frames ÷ FPS
FPS = Frames ÷ Duration(s)
Duration(s) = Frames ÷ FPS
FPS = Frames ÷ Duration(s)
Common Frame Rates and Their Frame Counts
| Frame rate | Typical use | Frames in 60 seconds |
|---|---|---|
| 24 fps | Cinematic film standard | 1,440 |
| 25 fps | PAL broadcast (EU) | 1,500 |
| 29.97 fps | NTSC broadcast (US) | 1,798.2 |
| 30 fps | Standard web/social video | 1,800 |
| 60 fps | Smooth motion, gaming, sports | 3,600 |
| 120 fps | Slow-motion capture (4x at 30 fps playback) | 7,200 |
Where This Matters
- Matching an image sequence to a timeline — if a renderer exported a fixed number of frames, you need to know how long that sequence plays back at your project's frame rate before dropping it into an edit.
- Verifying delivered footage — if a client expects a specific duration but the file has a different frame count than expected, working backward through the frame rate reveals whether the file was rendered at the wrong FPS.
- Planning slow motion — footage captured at 120 fps and played back at 30 fps stretches to four times its original duration; the frame count stays fixed while the effective playback duration changes.
How to Use This Calculator
- Choose a mode: Frames from Duration, Duration from Frames, or FPS from Frames + Duration.
- For Frames from Duration: enter Frame Rate (FPS) and Duration in seconds.
- For Duration from Frames: enter Frame Rate (FPS) and Total Frames.
- For FPS from Frames + Duration: enter Total Frames and Duration in seconds.
- Select Calculate to see the result for the chosen mode.
Related Calculations
Estimate how long a project will take to export at your target frame rate with the Video Render Time Calculator, or convert dimensions with the Video Aspect Ratio Calculator.