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Non-Drop Timecode to Whole Frame Count

Convert canonical hours, minutes, seconds and frame components to a frame offset at a whole-number constant frame rate.

  • Formula & worked example
  • Private in your browser
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

At 25 fps, timecode 01:02:03:04 corresponds to 93,079 frames from zero.

Frame count = (hours × 3,600 + minutes × 60 + seconds) × fps + remaining frames

Worked example

Enter these known values and leave the other values blank.

Whole-number frame rate (fps)
25 fps
Hours
1 hrs
Minutes
2 min
Seconds
3 sec
Frame component within the second
4 frames
Frame count from zero
93079

Assumptions and limitations

  • This is non-drop timecode at a positive whole-number constant frame rate. Fractional NTSC rates and drop-frame rules are excluded.
  • All components must be nonnegative integers. Minutes and seconds must be below 60, and the frame component must be below fps.
  • The output is a zero-based offset or duration. Hours can exceed 23 because this tool does not wrap daily timecode.

Common questions

Does 00:00:00:00 represent frame one?

It represents offset zero here. If a workflow numbers the first frame as one, apply that convention separately.

References

Bookify uses nonnegative whole frame counts and canonical components at a positive whole-number frame rate; fractional and drop-frame conventions are excluded.

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