How to Use the Timecode Duration Calculator
- Enter your start timecode. Type in the clip’s starting point in standard SMPTE format (HH:MM:SS:FF).
- Example:
01:02:15:12
- Example:
- Enter your end timecode. Input the point where you want the clip to finish.
- Example:
01:05:45:00
- Example:
- Select the frame rate. Choose the frame rate your project is using (23.976, 24, 25, 29.97, 30, 50, 59.94, 60, etc.).
- Click Calculate. The tool will instantly show you:
- Clip duration in timecode format (HH:MM:SS:FF)
- Duration in total frames
- Duration in seconds/minutes
Tip: This tool is especially useful for editors, assistant editors, and DITs who need exact clip runtimes, pull list prep, or frame-accurate EDL conforming. Always double-check whether your project is using drop-frame or non-drop-frame timecode when working with broadcast standards.
Timecode Duration Calculator
Result
Add multiple segments
Notes
This calculator uses exact frame-rate bases: 23.976 = 24000/1001, 29.97 = 30000/1001, 59.94 = 60000/1001. It treats timecode as non–drop-frame HH:MM:SS:FF (no semicolon accounting). For broadcast-accurate 29.97 drop-frame math (SMPTE), we can add DF support on request.
Understanding Timecode & Clip Duration
Timecode is the universal clock of film, television, and digital video production. It breaks down every frame of footage into hours, minutes, seconds, and frames, allowing editors, colorists, sound designers, and DITs to keep everything in sync. Knowing the exact duration between two timecodes is essential for editing workflows, broadcast delivery, and accurate project planning.
The Timecode Duration Calculator makes this process fast and precise. By entering a start timecode, end timecode, and frame rate, you can instantly see the clip’s total duration expressed in:
- Standard timecode format (HH:MM:SS:FF)
- Exact frame count
- Total time in seconds or minutes
This is particularly valuable when working with frame-accurate workflows. For example, editors often need to know the precise number of frames in a shot when conforming to an edit decision list (EDL) or creating pull lists for VFX. Broadcast producers must confirm that segments match strict runtime requirements. Even YouTubers and independent filmmakers benefit from understanding clip lengths for pacing, music sync, or online delivery.
Frame rate selection is critical. A time difference of 00:01:00:00 at 24 fps is 1,440 frames, while at 30 fps it’s 1,800 frames. The calculator accounts for this automatically, helping you avoid costly timing errors. For projects in NTSC broadcast standards, it’s also important to note the distinction between drop-frame (29.97 DF) and non-drop-frame timecode — which can drift over long runtimes if not calculated correctly.
This tool is especially useful for:
- Editors checking shot or sequence lengths during cutting.
- Assistant editors and DITs preparing logs, pull lists, or camera reports.
- Broadcast professionals ensuring compliance with runtime slots.
- Sound designers and composers syncing audio cues to frame-accurate visuals.
By using a Timecode Duration Calculator, you can eliminate guesswork, keep projects frame-accurate, and deliver with confidence — whether your work is destined for Hollywood features, television broadcast, or online platforms.