How to Calculate Timelapse Interval

Creating a timelapse requires careful planning of the interval between shots. The timelapse interval determines how quickly your final video will play compared to real time. This guide explains how to calculate the optimal interval for your project.

What is Timelapse Interval?

The timelapse interval is the time between consecutive photos in your timelapse sequence. It's measured in seconds, minutes, or hours and determines how much time will pass in your final video for each frame.

For example, if you set a 1-minute interval, each photo will be taken 1 minute apart. When played back at normal speed, your 1-hour timelapse will show 60 minutes of activity in just 1 minute.

How to Calculate Timelapse Interval

To calculate the timelapse interval, you need to determine how much time you want to compress into your final video. The basic formula is:

Timelapse Interval = Total Duration / Number of Frames

Where:

Total Duration is the total time you want to cover in your timelapse (in hours, minutes, or seconds)
Number of Frames is how many photos you'll take during that period

For example, if you want to create a 1-minute timelapse of a 1-hour construction project, you would need 60 photos taken at 1-minute intervals.

Formula

The exact formula for calculating timelapse interval is:

Interval (seconds) = (Total Duration × 3600) / Number of Frames

Where Total Duration is in hours

This formula converts the total duration from hours to seconds, then divides by the number of frames to get the interval in seconds.

Example Calculation

Let's say you want to create a 2-minute timelapse of a 4-hour sunset:

Convert 2 minutes to seconds: 2 × 60 = 120 seconds
Convert 4 hours to seconds: 4 × 3600 = 14,400 seconds
Calculate the interval: 14,400 / 120 = 120 seconds
Convert 120 seconds to minutes: 120 / 60 = 2 minutes

Therefore, you should take a photo every 2 minutes to create a 2-minute timelapse of a 4-hour sunset.

Practical Considerations

When calculating your timelapse interval, consider these factors:

Lighting Conditions

In low light, you may need longer intervals to ensure good exposure. During daylight, you can use shorter intervals.

Camera Settings

Faster shutter speeds may require longer intervals to avoid motion blur. Adjust your aperture and ISO accordingly.

Storage Capacity

Each photo takes up storage space. Calculate how many photos you can take before your memory card is full.

Pro Tip: For best results, take test shots at different intervals to find the optimal balance between detail and compression.

FAQ

What is the best timelapse interval for a sunset?

For a sunset timelapse, intervals between 1 to 5 minutes work well, depending on how much detail you want to capture. Shorter intervals (1-2 minutes) capture more movement, while longer intervals (4-5 minutes) create a smoother transition.

How do I calculate the number of photos needed for a timelapse?

Use the formula: Number of Photos = (Total Duration × 3600) / Interval. For example, for a 1-hour timelapse with a 5-minute interval: (1 × 3600) / 300 = 12 photos.

What's the difference between timelapse and hyperlapse?

A timelapse shows time passing at a constant rate, while a hyperlapse speeds up or slows down time based on movement. Timelapses are best for static scenes, while hyperlapses work well for moving subjects.