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Time Addition Calculator

Add as many durations as you need — HH:MM:SS, MM:SS, or HH:MM. Built for video editors, podcasters & planners.

Input Format
Durations
0:00:00
Breakdown
🎬 Frame Count (for editors)
24fps 25fps 30fps 60fps
Total frames:
Note: frame count is based on whole-second input only. Sub-second precision is not supported — timecode always shows :00 for frames within the last second.
⚠ What this tool does not do
  • Inputs are whole seconds only — sub-second (frames, milliseconds) are not supported.
  • Minutes and seconds fields are capped at 59. Hours are capped at 999. Values above these limits are clamped automatically and highlighted in amber.
  • Paste-to-split (importing a list of timestamps) has been removed — it was unreliable and is not available in this version.
  • Keyboard shortcut navigation between fields (arrow key / Enter jumping) has been removed — it was buggy and is not available in this version.
  • Format switching (e.g. HH:MM:SS → MM:SS) converts total seconds accurately, but the display is rounded to whole seconds — no fractional minutes.
  • Timecode shown in the frame count section assumes 0 sub-frame offset, as all inputs are whole seconds.