Time-Lapse Math Reference
Updated: July 2026
Time-lapse photography is governed by precise mathematical formulas. Before setting up your GoPro camera, you must calculate how many total frames will be captured, how long your final video clip will play back at 30fps, and how much MicroSD storage space will be consumed.
1. The Core Time-Lapse Formulas
Use these 3 core equations to calculate shooting interval, video duration, and storage space:
Formula 1: Total Frame Count
Total Frames = Real-Time Shooting Duration in Seconds / Interval in Seconds
Formula 2: Final Video Playback Length
Video Length (seconds) = Total Frames / Video Frame Rate (30 fps)
Formula 3: RAW MicroSD Storage Requirement
Storage Needed (GB) = (Total Frames × 12 MB) / 1024
2. Master Time-Lapse Interval Reference Matrix
Quick lookup table comparing shooting durations, intervals, frame counts, and final 30fps video clip lengths:
| Shooting Time | Interval | Total Frames | 30fps Playback Length | RAW Storage (12MB) |
|---|---|---|---|---|
| 30 Minutes | 1 Second | 1,800 Frames | 1 Minute 00 Seconds | 21.1 GB |
| 1 Hour | 2 Seconds | 1,800 Frames | 1 Minute 00 Seconds | 21.1 GB |
| 2 Hours | 5 Seconds | 1,440 Frames | 48 Seconds | 16.8 GB |
| 4 Hours (Sunset) | 10 Seconds | 1,440 Frames | 48 Seconds | 16.8 GB |
| 8 Hours (Construction) | 30 Seconds | 960 Frames | 32 Seconds | 11.2 GB |
| 24 Hours (Full Day) | 60 Seconds | 1,440 Frames | 48 Seconds | 16.8 GB |
| 30 Days (Long-Term) | 5 Minutes | 8,640 Frames | 4 Minutes 48 Seconds | 101.2 GB |
Key Takeaways
- Frames Per Second Rule: Standard video plays back at 30 frames per second (30 photos = 1 second of video).
- The Golden Ratio: A 1-hour shoot at a 2-second interval produces 1,800 frames = 60 seconds of finished video.
- Storage Calculation: RAW GPR/DNG photos average 12MB each; 1,000 photos require ~11.7 GB of SD card capacity.
- Sunset Interval Rule: Use a 5s to 10s interval for day-to-night transitions to keep video length between 30 and 60 seconds.