Timelapse Interval Calculator
Calculate optimal interval, total shots, and clip duration for smooth timelapse videos. Enter values for instant results with step-by-step formulas.
Calculator
Adjust values & calculateFormula
Where Event Duration is the real-world time you want to capture, Clip Length is the desired final video length in seconds, and FPS is the playback frame rate. The resulting interval tells you how many seconds to wait between each photo capture.
Last reviewed: December 2025
Worked Examples
Example 1: Sunset Timelapse Over 2 Hours
Example 2: City Traffic 30-Minute Timelapse
Background & Theory
The Timelapse Interval Calculator applies the following established principles and formulas. Computers represent all information using binary, a base-2 number system consisting solely of the digits 0 and 1, each called a bit. Because long binary strings are unwieldy, programmers routinely use octal (base 8) and hexadecimal (base 16) as compact shorthand. Converting between bases follows a consistent algorithm: divide the source number repeatedly by the target base, collecting remainders in reverse order. Hexadecimal digits A through F represent the values 10 through 15, allowing a single character to encode four binary bits, making it the preferred notation for memory addresses, color codes, and bytecode. Bitwise operations manipulate individual bits within integers. AND produces a 1 only when both input bits are 1, making it useful for masking. OR produces a 1 when either bit is 1 and is used for combining flags. XOR flips bits that differ, enabling simple toggle logic and efficient swap algorithms. NOT inverts every bit (one's complement), while left and right shifts multiply or divide by powers of two in constant time. Data storage units ascend in binary multiples of 1024: 8 bits form one byte, 1024 bytes form one kibibyte (KiB), 1024 KiB form one mebibyte (MiB), and so forth. Hard-drive manufacturers historically use decimal prefixes (1 KB = 1000 bytes), creating the persistent confusion between binary and decimal interpretations of the same label. The IEC standardized the binary prefixes KiB, MiB, GiB, and TiB in 1998 to resolve this ambiguity. Network bandwidth is measured in bits per second (bps), most commonly megabits per second (Mbps) or gigabits per second (Gbps). A 100 Mbps connection transfers 100 million bits every second, equating to roughly 12.5 megabytes per second. IP subnet masks define network boundaries; CIDR notation appends a prefix length (e.g., /24) to an address, indicating how many leading bits are fixed. A /24 subnet contains 256 addresses with 254 usable hosts. Algorithm efficiency is described using Big-O notation, which characterises the worst-case growth of time or space relative to input size. O(1) is constant, O(log n) is logarithmic (binary search), O(n) is linear, and O(n²) is quadratic. Cryptographic hash functions like SHA-256 produce a fixed 256-bit (32-byte) digest regardless of input length. File compression algorithms exploit statistical redundancy to reduce storage footprint, and compression ratio equals the original file size divided by the compressed size.
History
The history behind the Timelapse Interval Calculator traces back through the following developments. The conceptual foundation of modern computing traces back to Charles Babbage, whose Analytical Engine design of 1837 introduced the idea of a general-purpose mechanical computer with separate storage and processing units, including what he called the Store and the Mill. Ada Lovelace wrote what many consider the first algorithm intended for machine execution while annotating a translation of Luigi Menabrea's account of Babbage's work, also recognising the machine's potential to manipulate symbols beyond mere numbers. George Boole published "The Laws of Thought" in 1854, formalising a two-valued algebra of logic that would later map perfectly to electrical circuits. It remained largely a mathematical curiosity until Claude Shannon's landmark 1937 master's thesis demonstrated that Boolean algebra could describe switching circuits, laying the theoretical groundwork for all digital electronics. Shannon's 1948 paper "A Mathematical Theory of Communication" defined the bit as the fundamental unit of information and established information theory as a rigorous discipline. The same year, the transistor was invented at Bell Labs by Bardeen, Brattain, and Shockley, eventually replacing vacuum tubes and enabling miniaturisation at scale. ENIAC, completed in 1945, was one of the first general-purpose electronic computers, occupying 1800 square feet and consuming 150 kilowatts of power while performing roughly 5000 additions per second. The ASCII standard was ratified in 1963, assigning 7-bit codes to 128 characters and enabling interoperability between computers from different manufacturers. Through the 1970s, the microprocessor consolidated an entire CPU onto a single chip; Intel's 4004 in 1971 marked the beginning of this trend. The Apple II launched in 1977 and the IBM PC in 1981 brought computing to homes and offices, triggering a mass-market software industry. Tim Berners-Lee proposed the World Wide Web in 1989 and launched the first website in 1991 at CERN, transforming the internet from an academic and military network into a global information infrastructure. Mobile computing accelerated through the 2000s with smartphones integrating powerful processors, wireless networking, and GPS into pocket-sized devices, extending computation into every facet of daily life and cementing TCP/IP as the universal communications fabric.
Frequently Asked Questions
Formula
Interval = Event Duration (sec) / (Clip Length x FPS)
Where Event Duration is the real-world time you want to capture, Clip Length is the desired final video length in seconds, and FPS is the playback frame rate. The resulting interval tells you how many seconds to wait between each photo capture.
Worked Examples
Example 1: Sunset Timelapse Over 2 Hours
Problem: You want to capture a 2-hour sunset as a 10-second clip at 24 fps. What interval should you use and how many photos will you take?
Solution: Total frames needed = 10 seconds x 24 fps = 240 frames\nEvent duration = 2 hours = 7,200 seconds\nInterval = 7,200 / 240 = 30 seconds between shots\nStorage (RAW at 25 MB) = 240 x 25 MB = 6,000 MB = 5.86 GB\nSpeed-up factor = 7,200 / 10 = 720x
Result: Interval: 30 seconds | Total Shots: 240 | Storage: ~5.86 GB | Speed-up: 720x
Example 2: City Traffic 30-Minute Timelapse
Problem: You shoot city traffic for 30 minutes at a 3-second interval and play back at 30 fps. How long is the resulting clip?
Solution: Event duration = 30 minutes = 1,800 seconds\nTotal shots = 1,800 / 3 = 600 photos\nClip duration = 600 / 30 fps = 20 seconds\nSpeed-up factor = 1,800 / 20 = 90x\nStorage (RAW at 25 MB) = 600 x 25 MB = 15,000 MB = 14.65 GB
Result: Clip Duration: 20 seconds | Total Shots: 600 | Storage: ~14.65 GB | Speed-up: 90x
Frequently Asked Questions
What is a timelapse interval and how do I choose the right one?
A timelapse interval is the time between each photo capture in a timelapse sequence. Choosing the right interval depends on how fast your subject moves and how long you want the final clip to be. Fast-moving subjects like traffic or clouds typically use intervals of 1 to 5 seconds, while slow subjects like plant growth or construction projects may use intervals of minutes or even hours. The interval directly determines the speed-up factor of your final video. A shorter interval captures more frames and produces smoother motion, while a longer interval creates a more dramatic acceleration of time in the final clip.
How many photos do I need for a smooth timelapse video?
For a smooth timelapse video, you need at least 24 frames per second of final video, though 30 fps is standard for most modern displays. A 10-second clip at 24 fps requires 240 photos, while the same clip at 30 fps needs 300 photos. Most professional timelapses use between 200 and 500 photos for a 10 to 15 second clip. Having too few photos results in a choppy, stuttering video that looks unprofessional. It is always better to capture more frames than you think you need, as you can always speed up the final edit but cannot create frames that were never captured.
What frame rate should I use for timelapse playback?
The standard frame rates for timelapse playback are 24 fps for a cinematic look, 25 fps for PAL broadcast regions, and 30 fps for NTSC broadcast and web content. Most YouTube and social media timelapses perform best at 24 or 30 fps. If you plan to add slow-motion sections within your timelapse, shoot at a higher capture rate and conform to your timeline frame rate in post-production. The choice between 24 and 30 fps is largely aesthetic: 24 fps has a slightly more filmic quality with natural motion blur, while 30 fps appears slightly smoother and is preferred for web delivery.
How do I calculate storage requirements for a timelapse shoot?
Storage requirements depend on your camera resolution, file format, and total number of shots. A typical 24-megapixel JPEG file is about 8 to 12 MB, while a RAW file from the same camera can be 25 to 50 MB. For a 1-hour timelapse at 5-second intervals, you will capture 720 photos. In RAW format at 30 MB per file, that requires about 21 GB of storage. Always bring more storage cards than you think you need, as running out of space mid-shoot ruins the entire sequence. Professional timelapse photographers often carry 128 GB or 256 GB cards and shoot exclusively in RAW for maximum flexibility in post-processing.
What camera settings work best for timelapse photography?
The most important camera settings for timelapse are manual mode exposure, manual focus, and manual white balance. Using automatic settings causes flickering between frames as the camera adjusts exposure, focus, or color temperature independently for each shot. Set your aperture between f/8 and f/11 for optimal sharpness across the frame. Use the lowest ISO possible to minimize noise, typically ISO 100 or 200 for daylight timelapses. Shutter speed should generally be set to half the interval time (so a 4-second interval uses a 2-second shutter) to create natural motion blur in moving elements like clouds or water.
How does the speed-up factor affect the look of my timelapse?
The speed-up factor determines how dramatically time appears compressed in your final video. A speed-up factor of 10x means one minute of real time plays in 6 seconds, while a 100x factor compresses one minute into less than a second. Gentle speed-ups of 2x to 10x work well for moderately paced subjects like foot traffic or cooking processes. Medium speed-ups of 30x to 120x suit subjects like cloud movement, shadows, and sunrise or sunset sequences. Extreme speed-ups of 500x to 5000x are used for very slow subjects like plant growth, construction projects, or seasonal changes that unfold over days, weeks, or months.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy