How to Use Time-lapse Calculator
The Time-lapse Calculator is for planning a shoot before the camera starts running. It connects interval, frame count, and playback FPS so you can see both the real capture time and the final video duration.
- Enter the interval between frames in seconds. Short intervals create smoother motion; long intervals make slow changes more dramatic.
- Enter the total number of frames you expect to capture. This may come from memory-card capacity, battery life, or a desired final clip length.
- Enter the final video frame rate, commonly 24, 25, or 30 FPS.
- Use the capture duration to plan how long the camera must stay powered and undisturbed. Use the final duration to judge whether the clip is long enough for editing.
Formula & Theory - Time-lapse Calculator
The Time-lapse Calculator uses the following formula or calculation model:
Capture duration (seconds) = shooting interval × frame count
Final video duration (seconds) = frame count / FPS
Compression ratio = capture duration / final video durationTime-lapse compresses real time by recording fewer frames than normal video and then playing them back at a standard FPS. The total shooting time depends only on interval and frame count. The final clip length depends only on frame count and playback FPS. Comparing those two values gives a practical compression ratio.
Assumptions and Limits
The math does not account for exposure time, intervalometer delays, weather, changing light, focus drift, or storage write speed.
Use Cases for Time-lapse Calculator
Specific use cases include:
- Plan sunrise, sunset, cloud, traffic, plant-growth, or construction sequences.
- Check whether a battery and memory card can survive the whole capture period.
- Choose between 24 FPS cinematic playback and 30 FPS smoother playback.
- Estimate how many frames are needed for a 10-second final clip.