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This free video timecode calculator converts timecode, frames and seconds directly in your browser. Move between SMPTE-style timecode and exact frame positions, calculate durations, and work with common frame rates without reaching for a separate spreadsheet or calculator.
Choose a conversion, set the frame rate, and enter your value.
Video timecode gives individual frames readable addresses. A value such as 01:12:34:18 represents hours, minutes, seconds and frames, making it much easier to describe a precise location than relying on a rounded playback timer.
Select the conversion you need, choose the project's frame rate, and enter a timecode, frame count or duration in seconds. The calculator performs the conversion immediately in your browser and presents the result together with the frame rate and relevant frame information.
If you are working on the audio side of a project, you can also explore the browser-based audio tools or practice signal relationships with the interactive online audio mixer. Those tools focus on audio itself, while this calculator focuses specifically on positions and durations measured against video frames.
Turn an HH:MM:SS:FF position into a single frame number that can be compared, stored or used in calculations.
Start with an exact frame count and turn it back into an easy-to-read timecode address at the selected frame rate.
Convert seconds to the nearest frame or add and subtract timecodes when checking edits, cues, sections and sync points.
Select the direction of conversion or timecode arithmetic.
Use the same frame rate as the video or timeline you are working with.
Provide timecode, total frames or seconds depending on the selected mode.
Use the calculated frame position, timecode or duration in your workflow.
A video timeline is discrete: it is made of frames. That means a timestamp expressed only in decimal seconds may not identify the frame boundary you actually need. A frame-based reference removes that ambiguity and makes edit notes easier to communicate.
This is useful when identifying a dialogue edit, music entrance, sound effect, voiceover line, cut, transition or another event tied to picture. For projects involving spoken material, the production process may also include dedicated voiceover recording or commercial audio recording before the final sound is placed against video.
Musicians working to picture can use timecode references to identify where sections begin and end before moving into recording or production. If you are preparing for a session, the first-time recording studio guide covers practical preparation, while the article on how long vocal recording takes looks more specifically at planning vocal sessions.
A useful video timecode calculator online should do more than display a clock. It should let you move cleanly between the different ways an editor, musician, sound designer or audio engineer may receive a position: formatted timecode, an absolute frame number, or elapsed seconds.
The relationship depends on the selected frame rate. For integer frame rates such as 24, 25, 30, 50 and 60 fps, the frame field advances according to that nominal rate. Fractional rates such as 23.976, 29.97 and 59.94 require careful distinction between the actual playback rate and the nominal frame numbering used to write timecode.
Hours, minutes, seconds and frames provide a compact frame address. The final field is a frame number within the current second, not milliseconds.
A semicolon is commonly used to visually distinguish drop-frame timecode. The calculator supports drop-frame calculations for 29.97 and 59.94 fps.
The phrase can be misleading: drop-frame timecode does not delete picture frames. Instead, certain timecode numbers are skipped so that the displayed timecode stays much closer to real elapsed clock time at fractional rates derived from 30 or 60 fps.
At 29.97 fps, two frame numbers are skipped at the beginning of most minutes, except every tenth minute. At 59.94 fps, four numbers are skipped using the corresponding pattern. The video continues normally; only the labels used to identify frames are affected.
Converting timecode to a total frame count is useful when you want a single numeric position. Frame counts are convenient for comparing two locations, calculating offsets or moving information between workflows that represent positions differently.
The reverse conversion turns an absolute frame count into a readable HH:MM:SS:FF address. This can make a raw frame number easier to communicate when sharing cue points or revision notes.
Once timing and cue positions are established, the next stage may involve recording, editing or mixing. Browse audio recording, mixing and mastering services, learn more about working with an audio engineer, or explore mixing and mastering for songs and tracks. For instrument-focused projects, see the instrument recording guide.
Suppose you receive a revision note containing a frame number rather than a formatted timestamp. Choose Frames → Timecode, select the frame rate used by the project, and the frame count becomes a timecode position that is easier to locate on a compatible timeline.
If a cue sheet gives you a timecode and another part of the workflow needs frame positions, use Timecode → Frames. When a duration is supplied in seconds, Seconds → Timecode finds the nearest frame position at the selected rate.
The arithmetic mode is useful for simple offsets and durations. Add two values when a cue must be moved forward by a known amount, or subtract one timecode from another to find the frame-based distance between two positions.
When a project extends beyond calculation into performance and recording, different workflows may call for music recording, vocal and speech recording, or broader audio content recording. The timecode calculator remains a focused utility for the timing information that can accompany those projects.
If you want to experiment with another hands-on production interface, open the mixer console simulator. Artists preparing for studio work may also find the guide to recording confidence useful when moving from technical preparation into an actual performance.
Use the calculator whenever you need to translate between video timecode, frames and seconds, then continue with the rest of the Ronter Audio Lab tools.
Go beyond individual audio tools. Arrange multiple tracks, edit clips, build modular effect chains, add modulation, mix through a Master bus, save projects and export the finished mix to WAV.
Explore 168 free browser-based tools for musicians, singers, producers, engineers and creators. Open a category to find your next tool.
I build Ronter Sound Lab and the audio tools on this website as free resources for musicians, producers and creators. If these tools are useful to you and you would like to support the project, any voluntary contribution helps me continue developing the free online DAW, create new tools, improve existing features and keep everything available to everyone.
Every contribution, large or small, is sincerely appreciated. Thank you for supporting independent development.