Calculating your final clip length is straightforward once you know the Time Lapse formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Time Lapse Calculator.
What is Time Lapse?
The Time Lapse calculation tells you your final clip length from a few simple inputs. The figure you are solving for here is the final clip length.
The Time Lapse formula
The core formula is:
Final clip length = Shooting duration × 60 ÷ Interval between shots ÷ Playback frame rateHere is what each input means:
- Shooting duration — a value measured in minutes. Example: 60 minutes.
- Interval between shots — a value measured in seconds. Example: 5 seconds.
- Playback frame rate — a value measured in fps. Example: 24 fps.
How to calculate it step by step
- Write down the shooting duration (for example, 60 minutes).
- Write down the interval between shots (for example, 5 seconds).
- Write down the playback frame rate (for example, 24 fps).
- Apply the formula above to get your final clip length.
- Double-check the result with the Time Lapse Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Shooting duration | 60 minutes |
| Interval between shots | 5 seconds |
| Playback frame rate | 24 fps |
| Final clip length | 30.0 |
| Number of frames | 720 |
With shooting duration of 60 minutes, interval between shots of 5 seconds and playback frame rate of 24 fps, the final clip length works out to 30.0.
Example 2
With shooting duration of 120 minutes, interval between shots of 5 seconds and playback frame rate of 24 fps, the final clip length works out to 60.0.
| Result | Value |
|---|---|
| Final clip length | 60.0 |
| Number of frames | 1,440 |
Example 3
With shooting duration of 30 minutes, interval between shots of 5 seconds and playback frame rate of 24 fps, the final clip length works out to 15.0.
| Result | Value |
|---|---|
| Final clip length | 15.0 |
| Number of frames | 360 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Time Lapse Calculator does it instantly, for free, with the formula and a worked example built in.
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