Recording storage
Convert camera count, average bitrate, recording hours, and retention days into TB and TiB.
Open calculator →Plan the numbers before you buy
Stop guessing how much storage you need.
Estimate CCTV retention and usable RAID capacity from the settings that actually matter. Each result includes its assumptions, limits, and the next checks to make.
Your inputs are calculated on this device and are not sent to a server. How we handle privacy
Four focused calculators
Usable RAID capacity
Compare RAID 0, 1, 5, 6, and 10 after redundancy and reserved space.
Open calculator →Backup transfer time
Estimate completion time from data size, link speed, and realistic transfer efficiency.
Open calculator →NAS power cost
Convert average power draw and operating hours into monthly and annual energy cost.
Open calculator →Buying and operations guides
CCTV retention
Why bitrate, codecs, and motion recording change the estimate.
Read →Choosing RAID
Compare fault tolerance before capacity efficiency.
Read →3-2-1 backup
Why RAID cannot replace a recoverable backup.
Read →NAS running out of space
Check recycle bins, versions, and snapshots safely.
Read →Hard-drive checklist
Compatibility, workload, noise, and warranty.
Read →How this site works
Review formulas, editorial rules, and limitations.
Review →