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TechnologyGenerated accuracy model review: 2026-05-06
NVR Storage Calculator accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- Daily GB = cameras * bitrate Mbps * recording hours * 3600 / 8 / 1024. Required TB = daily GB * retention days * (1 + overhead percent / 100) / 1024.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Camera Count: 8
- Average Bitrate: 4 Mbps
- Recording Hours: 24 hr/day
- Retention Period: 30 days
- Overhead Buffer: 15%
Expected outputs
- Required Storage: 11.37 TB
- Daily Storage: 337.5 GB/day
- Total Camera Bitrate: 32 Mbps
- Retention Window: 720 hours
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- Bitrate is treated as an average sustained Mbps value.
- 1 TB is calculated as 1024 GB for capacity planning.
- Calculations run locally and do not process video.
Unit handling
- Camera Count accepts numeric values.
- Average Bitrate accepts values in Mbps.
- Recording Hours accepts values in hr/day.
- Retention Period accepts values in days.
- Overhead Buffer accepts values in %.
- Required Storage is displayed in TB.
- Daily Storage is displayed in GB/day.
- Total Camera Bitrate is displayed in Mbps.
- Retention Window is displayed in hours.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
- Input precision follows configured step values where provided.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current nvr-storage-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for NVR Storage Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.