What the Video Storage Calculator does
The Video Storage Calculator estimates how much storage recorded video may require over a chosen retention period. It uses four inputs: number of cameras, recording hours per day, retention period in days, and average bitrate per camera. Its result is an estimated storage capacity in decimal gigabytes (GB).
The calculator applies a simple data-rate model. It assumes every camera records for the same number of hours each day, uses the same average bitrate, and keeps footage for the full retention period. For example, a small media production team might use it to estimate space for behind-the-scenes cameras, interview recordings, or a fixed studio setup. The estimate can help with early planning before choosing drives or a storage system.
Video files do not all consume space at the same rate. Resolution, frame rate, codec, image detail, and recording settings can affect bitrate. Because the calculator takes bitrate as an input, use a figure that represents the actual recording configuration when available. A result based on an assumed bitrate is only as useful as that assumption.
How to use the Video Storage Calculator
Enter the number of cameras, the hours they record each day, how many days of footage you plan to retain, and the average bitrate for each camera in megabits per second (Mbps). The calculator multiplies those values to estimate the total capacity. All input ranges are bounded so the estimate remains within practical numeric limits.
- Number of cameras: Count the video sources that record to the storage being planned.
- Recording hours per day: Enter the daily recording duration per camera. Use 24 for continuous recording.
- Retention period: Enter the number of days that footage should remain available.
- Average bitrate per camera: Use the configured or measured bitrate for one camera, in Mbps.
For a worked example, suppose four cameras record continuously for 24 hours per day, footage is retained for 30 days, and each camera averages 4 Mbps. Applying the calculator formula gives 4 × 24 × 3,600 × 30 × 4 ÷ 8 ÷ 1,000, or 518,400 GB. This is a large amount because the example assumes four continuous streams at 4 Mbps for an entire month. Check the entered units and assumptions if the result seems unexpected.
The estimate uses decimal units: one GB is treated as 1,000 MB, and bitrate is converted from megabits to megabytes by dividing by eight. A drive or operating system may display capacity differently, so displayed values may not match the calculator exactly.
How the Video Storage Calculator formula works
The formula is camera count × hours per day × 3,600 × retention days × bitrate in Mbps ÷ 8 ÷ 1,000. The factor 3,600 converts each recording hour into seconds. Multiplying the bitrate by total recorded seconds gives the number of megabits. Dividing by eight converts megabits to megabytes, and dividing by 1,000 converts megabytes to decimal gigabytes.
Each input has a direct effect on the estimate. Doubling the camera count doubles the storage estimate when all other inputs stay the same. The same proportional relationship applies to daily recording time, retention days, and bitrate. This follows from the formula's multiplication structure and makes it straightforward to compare scenarios.
The result represents the sum of the estimated stream data across the selected cameras and period. It does not add room for file-system overhead, indexes, redundant copies, backups, or free space. It also does not model changes in bitrate over time. Compression may produce variable data rates, so an average bitrate is a planning input rather than a promise that every file will occupy the same amount of space.
Use cases for the Video Storage Calculator
Video teams can use this estimate during equipment planning when deciding whether an existing storage pool is plausibly large enough for a project. A production with several continuously recording angles can compare its expected needs with a setup that records only during scheduled sessions. Changing the hours-per-day input helps make that distinction explicit.
The calculator can also support rough planning for interview libraries, rehearsal captures, event documentation, or studio monitoring. For a project with different camera bitrates or recording schedules, calculate each group separately using the appropriate inputs, then add the group estimates. This avoids pretending that one bitrate or schedule describes every source.
For example, a team might estimate one set of cameras used for all-day room capture and another set used only during a daily production window. Running separate estimates helps show how much each group contributes under its own assumptions. The resulting figures are still estimates of recorded stream data, not a complete storage architecture plan.
When using the result to compare options, keep the assumptions consistent. If one scenario uses 20 days of retention and another uses 30, the difference reflects that change. If you also change bitrate or recording hours, note each change so the comparison remains understandable.
Other factors to consider when calculating video storage
Bitrate is often the most uncertain input. A camera's selected resolution alone does not tell you exactly how much space recordings will need. Codec, frame rate, scene movement, lighting, and encoder settings can all affect the data rate. If possible, record a representative sample with the intended settings and use its measured average bitrate.
Recording schedules also matter. The calculator assumes a steady number of hours every day. Motion-triggered recording, session-based production, and downtime can reduce actual recording time, while multiple sessions or longer event days can increase it. Choose an average that reflects the period you are planning for, or estimate separate schedules independently.
Capacity planning usually needs more than the raw footage total. A real workflow may keep duplicate copies, create proxies, generate exports, or retain project files alongside camera originals. Those items are outside this formula. Account for them separately using your workflow's own measurements and retention rules, and leave suitable operational headroom based on your storage system's requirements.
Finally, distinguish capacity from performance. This calculator estimates data volume only. It does not determine whether a drive array, network connection, or editing system can sustain the required write and playback rates. Those questions depend on the equipment and concurrent workloads and should be assessed separately.
Video Storage Calculator FAQ
Does the estimate include backups or duplicate copies?
No. It estimates the combined size of the recorded streams for the entered cameras and retention period. Add separate capacity for backups, replicas, proxies, exports, and other project assets if your workflow requires them.
Should I enter Mbps or MB per second?
Enter megabits per second (Mbps), the unit shown in the bitrate input. The formula divides by eight to convert bits to bytes. If your source reports megabytes per second, convert that value to megabits per second before entering it.
Why might the actual files use more or less space?
Actual storage depends on the encoded files. Variable bitrate recording, changing image complexity, codec settings, audio, and file overhead can make real usage differ from a steady-rate estimate. A sample recording from the intended setup can provide a more representative average.
Can I use different bitrates for different cameras?
The calculator applies one average bitrate to every camera in a run. For groups with different bitrates or recording schedules, calculate each group separately and sum the results. This keeps the assumptions visible and makes the estimate more useful.
Does this tell me what storage hardware to buy?
No. The result is a capacity estimate, not a hardware recommendation. Drive formatting, redundancy, backup policy, throughput, and system limits are outside the formula. Use the estimate as one planning input and check the requirements of the intended storage workflow.