Dash Cam Time Lapse Storage Calculator
A dash cam can capture hours of parking or driving footage in time lapse mode, but the amount of storage it needs depends on how often it records a frame and how large those compressed frames are. The Dash Cam Time Lapse Storage Calculator estimates the space needed for your recording schedule, helping you plan a memory card or compare different settings.
What the Dash Cam Time Lapse Storage Calculator does
The calculator estimates the storage used by time lapse video across one or more cameras. It combines the recording frame rate, average compressed frame size, daily recording time, number of days, and camera count to produce an Estimated Storage result in gigabytes (GB).
The estimate uses decimal units: 1 GB equals 1,000,000 KB. It covers the estimated size of the compressed frames, but it does not add space for audio or video file overhead. Actual footage can use more or less storage depending on the scene and how your dash cam compresses it.
The default values are illustrative assumptions, not specifications for a particular dash cam. For a more useful estimate, replace them with values that match your camera and recording schedule.
How to use the Dash Cam Time Lapse Storage Calculator
- Enter the time lapse frame rate. Use the number of frames recorded per second for each camera. For example, a setting of one frame per second records one frame during each second of footage.
- Enter the average compressed frame size in KB. This is the average size of a frame after compression. If you do not know it, use an assumption initially and refine it with information from a representative recording.
- Enter recording time in hours per day. Use the average number of hours each camera will record daily. A value of zero produces an estimate of zero GB.
- Enter the recording period in days. This is the number of days of footage you want to estimate, assuming the same daily recording time throughout the period.
- Enter the number of cameras. The calculation assumes every camera records for the same duration at the same frame rate and average compressed frame size.
Read the result as the estimated storage for the full schedule you entered. If your cameras use different settings or record for different lengths of time, calculate each group separately and add the estimates.
Use the time lapse recording frame rate, not the playback frame rate. A video may play back many recorded frames per second even though the camera captured those frames at a much slower rate.
How the Dash Cam Time Lapse Storage Calculator formula works
The formula first finds the total number of frames recorded, then multiplies that number by the average compressed size of each frame. Finally, it converts kilobytes to decimal gigabytes:
Estimated Storage (GB) = recording frame rate × average compressed frame size (KB) × hours per day × 3,600 × days × cameras ÷ 1,000,000
There are 3,600 seconds in an hour, so multiplying hours by 3,600 converts the recording schedule into seconds. Multiplying those seconds by the recording frame rate gives the number of frames per camera. The frame-size and camera-count inputs then provide the estimated total in KB.
Worked example using the default inputs
Suppose one camera records for eight hours per day over one day. Assume it captures one frame per second and that each compressed frame averages 200 KB. These are illustrative assumptions:
- Time lapse frame rate: 1 frame per second per camera
- Average compressed frame size: 200 KB
- Recording time: 8 hours per day
- Recording period: 1 day
- Number of cameras: 1
The calculation is 1 × 200 × 8 × 3,600 × 1 × 1 ÷ 1,000,000 = 5.76 GB. The displayed Estimated Storage is therefore 5.76 GB for the recorded frames. Audio and file overhead are excluded, so allow additional usable space when planning a card.
Each input scales the estimate directly. For example, if every other assumption stays the same, doubling the number of recording days doubles the estimated storage. The same relationship applies to the recording frame rate, average frame size, daily hours, and camera count.
Use cases for the Dash Cam Time Lapse Storage Calculator
- Planning parking surveillance: Estimate how much space a camera may need while recording parked time lapse footage during your usual daily parking period.
- Comparing frame-rate settings: Enter different recording frame rates while keeping the other assumptions unchanged to see how the estimated storage changes.
- Planning a longer recording period: Estimate how much space several days of footage could require before selecting a suitable card capacity.
- Estimating multiple cameras: Include cameras with matching settings and schedules in one calculation. Calculate different setups separately.
- Reviewing a real recording: Use a representative sample to help refine your frame-size assumption, then estimate a longer period using the same settings.
These comparisons can help readers of bestdashcamsreview.com understand the storage trade-offs between recording schedules and camera settings. The result is a planning estimate, so check your dash cam’s documentation for its supported card capacities and recording modes before choosing a card.
Other factors to consider when calculating Estimated Storage
Scene content and compression: A frame-size value is an average, and compressed frame sizes can vary. Changes in lighting, movement, weather, and scene detail can affect the actual recording. A short sample may not represent every situation the camera will encounter.
Audio and file overhead: The formula estimates compressed frame data only. If your recording mode includes audio, or the camera adds data through its file format, the resulting files may take more space than the estimate.
Usable card capacity: A card’s usable space may be lower than its advertised capacity, and some space may be reserved or occupied by other files. Choose a card with enough usable capacity above the estimate rather than treating the calculated figure as an exact card requirement. Cards are sold in fixed capacities, so select a supported size that provides a practical margin.
Loop recording: Many dash cams overwrite older footage when storage fills. This calculator estimates the space required for the entered schedule; it does not model when files will be overwritten or how protected files affect available space.
Different cameras and schedules: A front camera and a rear camera may not produce frames of the same average size. Likewise, a camera may record for fewer hours on some days. Separate calculations can make those differences easier to account for.
Checking your assumption: When possible, record a representative time lapse sample with the intended settings. If you can determine the compressed frame data size and frame count, divide the size in KB by the number of recorded frames to estimate the average KB per frame. A total video file size can include audio and overhead, so it is not necessarily an exact measure of compressed frame size.
Frequently asked questions
How much storage does a dash cam time lapse use?
It depends on the recording frame rate, average compressed frame size, recording duration, and number of cameras. Under the calculator’s illustrative defaults, one camera recording at one frame per second with an average frame size of 200 KB for eight hours uses an estimated 5.76 GB for compressed frames.
Should I use the recording frame rate or the playback frame rate?
Use the time lapse recording frame rate: the number of frames the camera captures per second. The playback frame rate controls how quickly those captured frames appear when the video is played and can be different.
Does the estimate include audio and file overhead?
No. The formula estimates storage for compressed frames and excludes audio and container overhead. If your camera records additional data, the final files can be larger than the result.
How do I calculate storage for front and rear cameras?
If both cameras have the same recording duration, frame rate, and average compressed frame size, enter two for the number of cameras. If their settings or frame sizes differ, calculate each camera separately and add the results.
Will the calculator tell me when loop recording overwrites footage?
No. It estimates the storage required for the schedule you enter, but it does not model loop recording, reserved space, protected files, or the usable capacity of a particular memory card. Allow extra space and check the camera’s recording behavior when planning how much footage to retain.