Time Lapse Calculator:
Interval, Shots, Storage and Battery Planner

The core time lapse formula has three parts. First: Total Shots = Shoot Duration (seconds) / Interval (seconds). Second: Video Duration (seconds) = Total Shots / Frame Rate (fps). Third: Required Interval = Shoot Duration / (Target Video Duration x Frame Rate). These three formulas are mathematically equivalent, each solving for a different unknown. This calculator handles all three simultaneously in its three mode tabs, so you can work from any two known values to find the third.

For a standard sunset or sunrise time lapse, a 3 to 10 second interval works for most subjects at typical US locations. The exact interval depends on how fast clouds are moving across the sky, whether you want a subtle or dramatic acceleration effect, and how long you plan to shoot. A 2-hour golden hour shoot at a 5-second interval produces 1,440 frames, which is 48 seconds of video at 30fps and about 20 seconds at 24fps. Use the NOAA Solar Calculator to find the exact civil twilight duration for your location and date, then use this calculator to find the interval that produces your target video length from that shooting window.

The minimum safe interval for JPEG capture is typically 1.5 to 3 seconds for most modern mirrorless cameras shooting to UHS-II cards. At intervals shorter than this, the camera may not finish writing the previous file before the next intervalometer trigger fires, causing missed shots. This calculator flags intervals below 2 seconds as potentially too short for JPEG capture. The exact minimum depends on your camera model, image size setting, and card write speed. Canon, Nikon, and Sony publish minimum intervalometer intervals in their technical documentation. Some cameras display a “busy” warning when the interval is too short for continuous capture, which is the definitive signal that you need to increase the interval.

RAW files are typically 3 to 6 times larger than JPEG equivalents for the same camera at the same resolution. A JPEG Large from a 24-megapixel camera might be 10 to 15MB, while the RAW equivalent is 25 to 35MB. After each exposure, the camera must write this full RAW file to the memory card before the buffer can accept the next shot. Even with a fast UHS-II card rated at 250 MB/s, a 30MB RAW file takes approximately 0.12 seconds to write, plus buffer processing time, buffer clearing, and shutter recock time. The minimum cycle time for RAW capture on most mirrorless cameras is 4 to 8 seconds, depending on megapixel count. Below this threshold, the camera drops frames, producing gaps in the sequence that cannot be fixed in post-production.

Cards needed = ceiling(Total Shots x File Size per Shot in MB / Card Capacity in MB). For example: 1,440 shots at 12MB per file = 17,280MB = 16.9GB. One 32GB card fits all frames with room to spare. One 64GB card provides comfortable headroom plus backup space. This calculator performs this calculation automatically once you enter the file size (or select a preset format) and your card size. The calculator rounds up to the nearest whole card, since partial cards are not useful. For shoots with more than two cards’ worth of content, build in time to swap cards mid-shoot without triggering the intervalometer to fire during the change.

A holy grail time lapse is a continuous sequence that transitions from a fully daylit scene to a fully dark night sky (or vice versa) without a visible brightness jump between frames. During this transition, which can span 2 to 4 stops of exposure change over 20 to 40 minutes, the photographer must continuously adjust exposure (shutter speed, aperture, or ISO) to maintain consistent brightness. The complexity lies in calculating an interval that is long enough to accommodate the longest night exposure (often 20 to 30 seconds for Milky Way shots) while still producing enough frames for a smooth video. A 30-second interval over a 3-hour holy grail session produces only 360 frames, which is 12 seconds at 30fps. Most photographers shoot at the longest required exposure plus 5 to 10 seconds of buffer time as the interval, then plan for a shorter video length rather than compromising on the exposure quality.

It depends on your interval. At a 5-second interval over 4 hours, you take 2,880 shots. If your battery handles 600 shots per charge, you need 5 batteries (ceiling of 2,880 / 600 = 4.8, rounded up to 5). At a 10-second interval, you take 1,440 shots and need 3 batteries. This calculator shows the exact battery count for your inputs. Add one extra battery as a safety margin for cold weather or unexpected delays. For multi-day or unattended time lapse installations, a dummy battery (AC coupler) connected to an external power supply or battery pack is the professional solution, eliminating battery changes entirely. Many US photographers use power banks with 20,000mAh or larger capacity for multi-hour unattended shoots at remote locations.

The most common output frame rates for US photographers are 24fps (the standard cinematic frame rate used in US film and streaming production), 30fps (the NTSC US broadcast standard used for television and most YouTube content), and 60fps (used for high-frame-rate sports and commercial work). At the same number of frames, 60fps produces a video that is 2.5 times shorter than 24fps. A sequence of 1,440 frames is 60 seconds at 24fps, 48 seconds at 30fps, and 24 seconds at 60fps. For time lapse work that will be integrated into narrative or documentary video, use the frame rate of your project timeline. For standalone web or social media delivery, 30fps is the default. This calculator shows the video duration at all five common frame rates simultaneously in its multi-FPS table.

Yes. The core calculation formulas work for any camera or device that captures still frames at regular intervals, including GoPro, DJI action cameras, and smartphone camera apps with intervalometer functions. For GoPro time lapse in video mode (where the camera handles the interval internally and outputs a video file directly), the playback speed setting functions identically to selecting an interval. A GoPro set to 2x speed captures 2 frames per second and plays them back at 30fps, giving a 15x acceleration. At 0.5 second interval, you capture 2fps, equivalent to a 15x speed ratio at 30fps output. Enter these values in this calculator to confirm storage and plan around the GoPro’s battery life (typically 1.5 to 3 hours per charge, far shorter than most mirrorless cameras).

The acceleration factor tells you how much faster real-world time appears to move in the finished video. Acceleration Factor = Interval (seconds) x Frame Rate (fps). At a 5-second interval and 30fps output, the acceleration factor is 150x: one second of video represents 150 seconds (2.5 minutes) of real time. At a 30-second interval and 30fps output, the factor is 900x: one second of video represents 900 seconds (15 minutes) of real time. This relationship lets you design for specific creative effects. A 150x factor makes cloud movement dramatic and satisfying. A 900x factor compresses an entire workday into seconds, suitable for construction documentation. The calculator implicitly handles this through its core formulas, but understanding the acceleration factor helps you choose an interval based on how fast you want the final video to feel.

It depends on the park and the nature of the shoot. The National Park Service requires a filming permit for commercial still photography and video production in most parks, which includes professional time lapse work with assistants, additional equipment, and a commercial purpose. Personal, non-commercial photography does not require a permit in most national parks. The specific rules vary by park: some parks require permits for tripod use in certain areas; others have restrictions on intervalometer and remote photography equipment during wildlife management periods. Check the filming and photography section of your specific National Park’s website at nps.gov before planning any extended time lapse shoot. Permit fees are typically $150 to $400 per day for commercial shoots.

The US photography and video industry uses several standard tools for time lapse compilation. Adobe Lightroom Classic handles RAW sequence import, batch develop processing, and export to video via the Slideshow module or LRTimelapse integration. Adobe After Effects and Premiere Pro accept image sequences directly and provide the most professional color grading and motion control for final delivery. For free options, DaVinci Resolve (free version) accepts JPEG or TIFF sequences and provides professional-grade color grading tools. LRTimelapse (paid, Windows and Mac) is the industry standard specifically for time lapse deflicker processing and exposure ramping, especially for holy grail transitions. Final Cut Pro on Mac accepts image sequences natively. All of these tools accept the image sequences you plan with this calculator.

Deflicker refers to the visible brightening and darkening of consecutive frames in a time lapse sequence, producing a strobing effect in the final video. It occurs because the camera’s auto-exposure system makes slightly different metering decisions for each frame, even when shooting in manual exposure mode, due to variations in the capacitor discharge of the electronic shutter, slight voltage variations across the image sensor, and JPEG engine differences. The most reliable prevention technique is shooting in full manual exposure (manual ISO, shutter speed, and aperture) so that every frame receives identical settings. For changing-light scenarios, LRTimelapse software uses keyframe-based exposure ramping to smooth gradual changes across hundreds of frames. Shooting RAW provides the processing latitude to correct small inconsistencies in post-production that JPEG capture cannot recover.

The 180-degree shutter rule is a cinematography guideline stating that the shutter speed should be double the frame rate for natural-looking motion blur. At 24fps, the rule suggests a 1/48 second shutter. At 30fps, 1/60 second. Applied to time lapse, the rule means using a shutter speed of approximately 1/50 or 1/60 second when you want motion blur in the moving elements (clouds, water, traffic streaks) for a cinematic look. Many time lapse photographers deliberately choose faster shutter speeds (1/250 to 1/1000 second) to freeze motion and produce the sharp, staccato movement that defines the classic time lapse aesthetic. The choice is creative, not technical, and neither approach is wrong. A neutral density filter is often needed in daylight to achieve slow shutter speeds without overexposure.

Cold temperatures significantly reduce battery performance. Lithium-ion batteries lose 20 to 40 percent of their rated capacity at 32°F (0°C) and up to 50 percent at 14°F (-10°C), temperatures common at high-altitude US locations like Rocky Mountain National Park, Crater Lake, or Glacier National Park in winter. Memory card write speeds also decrease in the cold, increasing minimum cycle times for RAW capture. Carry batteries in an inner pocket against your body to maintain temperature between swaps, and only install them in the camera immediately before they are needed. Extreme heat above 95°F, encountered in desert US locations like Death Valley or the Sonoran Desert in summer, can cause cameras to overheat and shut down during long time lapse sessions. In desert summer heat, shade the camera and card between sessions where possible.

All calculators on the USCalculators.com Tech Hub are completely free. No account, email, or subscription is required. The PDF report export generates a complete shooting plan with your inputs, all results, the multi-FPS table, and storage and battery planning data in a downloadable A4 document. The WhatsApp share button formats and sends your calculation summary directly to your phone or your team. No data you enter is transmitted, logged, or stored anywhere outside your browser session.