What does the last number in a timecode mean?

The last two digits (`FF`) indicate the frame number within that second, counting from 0 up to FPS minus 1 (e.g., frames 00 through 23 in a 24 fps project).

Why does 23.976 fps exist instead of pure 24 fps?

When color television was introduced to the US NTSC broadcast system, 30 fps was slowed by 0.1% to 29.97 fps to prevent audio carrier wave interference. Transferring 24 fps film to NTSC broadcast similarly slowed film to 23.976 fps.

Media & Images

SMPTE 12M Timecode & Frame Calculator

The problem: VFX animators, audio editors, and video conformers constantly need to convert between timecode stamps and raw frame integers.

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Frame Rate (FPS):

Total Frames

2,172

Animation / VFX frames

SMPTE 12M Timecode

00:01:30:12

HH:MM:SS:FF format

Real Time Duration

90.5s

90,500 ms

Single Frame Time

41.67 ms

1 frame @ 24 fps

Enter Video Timecode (HH:MM:SS:FF)

Presets:

SMPTE 12M Timecode & Frame Calculator: the complete guide

The SMPTE 12M Timecode & Frame Count Calculator converts broadcast video timecodes (`HH:MM:SS:FF`) into exact cumulative frames and milliseconds, and vice versa. Supports 23.976 fps, 24 fps, 25 fps PAL, 29.97 NDF, 30 fps, 50 fps, and 60 fps standards for video editors, animators, and sound designers.

SMPTE 12M Timecode Architecture in Modern Post-Production

Standardized by the Society of Motion Picture and Television Engineers (SMPTE), timecode assigns an immutable address to every individual video frame: hours, minutes, seconds, and frames (`HH:MM:SS:FF`). In multi-camera editing and audio mixing, timecode provides frame-accurate synchronization across separate audio recorders, VFX renders, and timeline sequences.

Frame Rates, Animation Counts, and Millisecond Durations

Animation studios and game developers work directly in discrete frame units (e.g. 2,172 frames) rather than wall-clock seconds. Because 24 fps yields 41.67 milliseconds per frame while 60 fps yields 16.67 milliseconds, accurate bidirectional translation between timecodes and frame numbers is essential for frame-rate conversions.

Step by step: how to use SMPTE Timecode

1
Choose your calculation mode: Timecode to Frames or Frames to Timecode.
2
Select the production frame rate (23.976, 24, 25 PAL, 29.97 NDF, 30, 50, or 60 fps).
3
Enter the timecode address (e.g. 00:01:30:12) or the raw frame integer.
4
Review the total frames, timecode string, wall-clock duration in seconds, and single-frame duration in ms.
5
Use preset quick buttons to test standard reel lengths and commercial spot durations.

Security & privacy

All SMPTE frame arithmetic and time calculations run purely client-side.