What this Video Storage Calculator does
The Video Storage Calculator estimates how much space a set of video recordings will occupy. It uses four details: recording duration per camera each day, video bitrate, camera count, and the number of days to retain recordings. Its result is an estimate in decimal gigabytes (GB), where one GB is 1,000,000,000 bytes.
The calculation converts the bitrate from megabits per second into bytes, then scales it across the recording time and cameras. This is useful when planning a video production archive, estimating space for a batch of recorded interviews, or sizing a basic surveillance recording setup. It gives you a consistent starting point for comparing recording plans.
The estimate assumes each camera records at a constant bitrate for the full stated duration on every day in the retention period. It does not include additional space for file containers, indexes, metadata, filesystem overhead, or spare capacity. Real files can therefore differ from the displayed estimate.
How to use the Video Storage Calculator
Enter the values that describe the recordings you plan to keep. Use the bitrate shown by your camera, encoder, or editing export settings when available. If a device lists a range, use the expected average for a practical estimate, and remember that variable bitrate recordings can fluctuate.
- Recording duration is the number of hours each camera records per day.
- Video bitrate is the encoded data rate in megabits per second (Mbps).
- Number of cameras is the count of streams with the same duration and bitrate assumptions.
- Recording period is the number of days of footage you intend to retain.
For example, consider two cameras recording for two hours per day at 8 Mbps over 30 days. Enter 2 hours, 8 Mbps, 2 cameras, and 30 days. The result is 518.40 GB. This follows the calculator formula: 2 × 3,600 × 8 × 1,000,000 × 2 × 30 ÷ 8 ÷ 1,000,000,000 = 518.4 GB. The factors convert hours to seconds, megabits to bits, and bits to bytes before converting bytes to decimal gigabytes.
Use matching assumptions across inputs. If different cameras record at different bitrates or schedules, calculate each group separately and add their storage estimates. This avoids treating every stream as though it has the same settings when it does not.
How the Video Storage Calculator formula works
The formula multiplies duration in hours by 3,600 seconds per hour, bitrate in Mbps by 1,000,000 bits per megabit, camera count, and recording days. It then divides by 8 bits per byte and by 1,000,000,000 bytes per decimal gigabyte.
In compact form, the model is:
Storage (GB) = duration hours × 3,600 × bitrate Mbps × 1,000,000 × cameras × days ÷ 8 ÷ 1,000,000,000
Because the same assumptions are applied throughout the period, storage rises in direct proportion to any of the four inputs. Doubling the duration, bitrate, camera count, or retention period doubles the estimate, provided the other inputs stay fixed. This transparent relationship makes the result easy to check with a spreadsheet or a small sample recording.
The calculator uses decimal GB. Some operating systems and storage tools report binary units such as GiB, which use 1,073,741,824 bytes. The same byte total will appear as a smaller number in GiB than in decimal GB. Check which unit a storage device or software interface uses before comparing figures.
Use cases for the Video Storage Calculator
Video teams can use the estimate when preparing a production day, archiving event footage, or deciding how much removable storage to bring to a shoot. If recording is spread across several cameras, the camera count makes the combined data volume visible. Editors can also use the model to compare a low-bitrate proxy workflow with a higher-bitrate master recording plan, as long as they enter the bitrate for the files they mean to store.
The calculator can help with planning recurring recordings as well. A small daily amount can accumulate across many days, so multiplying by the retention period offers a quick view of the total archive size. For a setup with mixed formats, create separate estimates for each format or camera group, then sum the results.
It is also useful as a rough capacity check before a project begins. Compare the estimate with the capacity available, leaving room for other files and for operational needs such as copies, exports, or working media. The result describes the video data under the supplied assumptions. It does not select a storage device or guarantee that a particular workflow will fit.
Other factors to consider when calculating video storage
Actual storage depends on the encoded files. Variable bitrate encoding changes data use according to image complexity, motion, and encoder settings. A scene with fast movement or fine detail may require a different average rate than a static scene. Audio tracks also add data, although their contribution is often smaller than the video stream.
Recording schedules matter too. Motion-triggered recording, breaks, rejected takes, and gaps reduce or change the duration represented by a simple full-hours-per-day assumption. If recording is intermittent, estimate the actual average hours per day or calculate separate periods. If cameras use different settings, do not combine them into one average unless that average represents the data closely enough for the planning decision.
Finally, plan for the rest of the workflow. File wrappers, project files, backups, duplicate copies, exports, and system overhead use additional capacity. Keep a practical margin based on your own recording tests and storage policy. A short test at the intended settings can help calibrate the estimate: measure the resulting file size, divide by its duration, and use that observed data rate for a more representative calculation.
Video Storage Calculator FAQ
Does the estimate include audio?
It includes whatever data is represented by the bitrate you enter. If the stated bitrate covers the complete encoded stream, including audio, it is represented. If it is video-only, the audio data is omitted from the estimate.
Why does my recorded file use more space?
The file may have a higher average bitrate, additional audio or data tracks, or container and filesystem overhead. Variable bitrate recording and other files stored alongside the video can also explain a difference.
Should I enter the camera's maximum bitrate?
Use a bitrate that reflects the files you expect to retain. A maximum can be useful for a conservative capacity check, while an observed average from a representative recording may better describe a typical archive.
What is the difference between GB and GiB?
Decimal GB contains 1,000,000,000 bytes. Binary GiB contains 1,073,741,824 bytes. Storage interfaces may use either unit, so compare the underlying byte capacity or confirm the displayed unit.
How do I estimate cameras with different settings?
Calculate each group using its own duration and bitrate, then add the GB results. This keeps each stream's recording assumptions explicit and produces a combined estimate.