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.
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Hr
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Total video length
4 min 30 sec
(4:30)
Clip count
3 clips
3 clips total 4 min 30 sec
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.
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 = (4200 + 2700 + 7200) = 14,100 seconds = 3 hours 55 minutes. Minutes overflow: 10 + 45 = 55 minutes (no full hour), plus 2 hours = 2h 55m. Wait — 1h + 45m + 2h = 3h 55m. Correct.
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.