Video Duration Calculator
Calculate total video length from multiple clips. Add clip durations, get the combined total instantly. Works for video editing, production planning, and content scheduling.
Core formula
Total seconds = sum of all clip seconds.
Example
1m 30s + 2m 15s + 45s = 4m 30s.
Works for audio
Use the same math for podcasts, voice clips, music, and lessons.
Use the exact HH:MM:SS value from your editor, player, or media bin.
Enter each clip once, and add separate rows for intros, outros, ads, or chapter breaks.
Adjust for overlaps or trimmed sections before entering the duration if your timeline is layered.
Total = clip1 + clip2 + clip3 + ... (in seconds)
Each clip duration is converted to seconds using (hours × 3,600) + (minutes × 60) + seconds. All clip values are summed, then the total is converted back to the standard HH:MM:SS format.
This is particularly useful for video editors planning a final cut, content creators calculating total runtime for YouTube or course content, or producers estimating delivery time for multi-segment projects.
Example
1m 30s plus 2m 15s plus 45s equals 4m 30s after all clips are summed in seconds.
Assumption
Every clip is counted once, in sequence, with no overlap unless you manually adjust the entered durations.
Limitation
Transitions, intros, silence trimming, render time, upload time, and encoding settings are not included.
Editing timelines
Add source clip lengths before creating a rough cut or delivery estimate.
Course modules
Calculate total lesson runtime across multiple videos in a chapter or course.
Podcast segments
Add intro, interview, ad break, and outro durations for a final episode length.
Content schedules
Estimate how much viewing or listening time a playlist, batch, or campaign contains.
How many clips can I add?
You can add an unlimited number of clips. The calculator starts with three clips by default, and you can add more with the + Add clip button.
What is 1 hour 10 minutes plus 45 minutes plus 2 hours?
1h 10m + 45m + 2h = 3 hours 55 minutes. In seconds, that is 4,200 + 2,700 + 7,200 = 14,100 seconds.
Does this work for audio files?
Yes. The calculator is time-based, not video-specific. It works for any media with hour/minute/second durations — podcast episodes, music albums, voice recordings, or lecture segments.
How do I estimate file size from duration?
File size depends on bitrate. A rough formula: size (MB) = bitrate (Mbps) × duration (seconds) ÷ 8. For a 10-minute H.264 video at 5 Mbps: 5 × 600 ÷ 8 = 375 MB.
Suggested workflow
Clip runtime path
Move from clip totals to playback speed and duration math for editing or publishing plans.