How do I add, subtract, and convert SMPTE video timecodes?

Enter timecodes (HH:MM:SS:FF), select frame rate (24 FPS, 25 FPS PAL, 29.97 FPS Drop Frame, 30 FPS, or 60 FPS), and perform addition, subtraction, or total duration calculations.

What is Drop Frame (29.97 DF) timecode and why does it skip frames?

Drop Frame timecode skips timecode numbers (not video frames) at the start of every minute except every tenth minute to keep timecode synchronized with real-world wall clocks.

Can I convert timecode to total frame count and milliseconds?

Yes. The calculator converts timecodes directly to total frame numbers, milliseconds, and seconds.

How do I calculate total duration of multiple video clips?

Add multiple in/out timecode pairs to calculate cumulative timeline duration.

Can I copy formatted timecodes for editing software (Premiere/DaVinci)?

Yes. Copy standard SMPTE timecodes to clipboard with one click.

Is calculation performed locally?

Yes. Uses exact frame-accurate integer math in browser JavaScript.

NexLove Calculator

Video Timecode Calculator

Convert and calculate between video timecodes (HH:MM:SS:FF), total frame counts, and milliseconds across 23.976, 24, 25, 29.97, 30, 59.94, and 60 FPS standard editing formats.

TL;DR: Video Timecode Calculator is a 100% free browser-based calculator utility. Convert between SMPTE timecode (HH:MM:SS:FF) and total frame count across standard editing frame rates.

Timecode (HH:MM:SS:FF)

Frame Rate (FPS)

Understanding Video Timecode Calculator

Convert and calculate between video timecodes (HH:MM:SS:FF), total frame counts, and milliseconds across 23.976, 24, 25, 29.97, 30, 59.94, and 60 FPS standard editing formats. Designed for creators, video editors, audio engineers, web designers, and developers who need instant, high-precision processing without software installation, watermarks, or file uploads.

Mathematical Formula & Technical Methodology

\text{Total Frames} = (3600 H + 60 M + S) \times \text{FPS} + F

Formula Variables Explained:
Converts non-drop-frame and drop-frame timecode components into linear frame indices.

Step-by-Step Worked Example

00:01:30:15 at 24 FPS equals 2,175 total video editing frames (90.625 seconds).

100% Client-Side Privacy Guarantee

All media decoding, manipulation, calculations, and encoding execute locally inside your web browser using HTML5 Canvas, Web Audio API, WebCodecs, Web Crypto, and modern JavaScript engines. Zero server uploads, zero telemetry, and no registration required.

Frequently Asked Questions

: Enter timecodes (HH:MM:SS:FF), select frame rate (24 FPS, 25 FPS PAL, 29.97 FPS Drop Frame, 30 FPS, or 60 FPS), and perform addition, subtraction, or total duration calculations.
: Drop Frame timecode skips timecode numbers (not video frames) at the start of every minute except every tenth minute to keep timecode synchronized with real-world wall clocks.
: Yes. The calculator converts timecodes directly to total frame numbers, milliseconds, and seconds.
: Add multiple in/out timecode pairs to calculate cumulative timeline duration.
: Yes. Copy standard SMPTE timecodes to clipboard with one click.
: Yes. Uses exact frame-accurate integer math in browser JavaScript.

Embed This Tool

Add the live Video Timecode Calculator to your own website with this embed code:

<iframe src="https://nexlove.org/embed/video-timecode-calculator.html" width="100%" height="650" style="border:1px solid #e2e8f0;border-radius:12px" title="Video Timecode Calculator — NexLove" loading="lazy"></iframe>

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