Hikvision Disk Calculator
Estimate how much storage your Hikvision NVR/DVR setup needs based on camera count, bitrate, recording schedule, retention period, and RAID profile.
Assumption: calculation uses average stream bitrate. Real-world usage varies with scene motion, VBR settings, codec profile (H.264/H.265/H.265+), frame rate, and camera image complexity.
What this Hikvision disk calculator does
A Hikvision disk calculator helps you size hard drives for surveillance recording. Instead of guessing, you enter your camera count, stream bitrate, schedule, and retention target, then the tool estimates required storage in TB. This is useful when planning a new NVR, upgrading old drives, or checking whether your current storage can meet compliance rules.
How the storage estimate is calculated
The core idea is simple: bitrate tells you how much data is produced each second. Multiply by recording time, multiply by number of cameras, then multiply by days kept. Finally, add overhead for safety.
- Daily GB per camera = Mbps × seconds recorded per day ÷ 8 ÷ 1024
- Total TB for retention = (Daily GB × number of cameras × days) ÷ 1024
- Usable target TB = Retention TB × (1 + overhead%)
If you choose RAID, raw installed capacity must be higher than usable target capacity because parity or mirroring consumes space.
Typical bitrate guidance for Hikvision planning
If you do not know your exact bitrate, use these as starting points. Always verify actual values in your recorder or VMS after installation.
| Camera Profile | Typical Codec | Approx Bitrate | Notes |
|---|---|---|---|
| 1080p basic scene | H.265 | 1.0-2.0 Mbps | Good for indoor corridors and stable lighting. |
| 2MP mainstream | H.264 | 2.0-4.0 Mbps | Common legacy deployments. |
| 4MP / 5MP | H.265 | 2.5-6.0 Mbps | Depends heavily on motion and noise. |
| 4K / 8MP | H.265 | 6.0-12.0 Mbps | Higher detail means much larger storage demand. |
Example sizing scenario
Suppose you have 16 cameras at 2.5 Mbps, record 24/7, need 30 days retention, and want 10% safety overhead:
- Daily per camera: about 26.37 GB
- All cameras daily: about 421.9 GB
- 30 days: about 12.36 TB
- With 10% overhead: about 13.60 TB usable target
If you then choose RAID 5 with 10 TB drives, the calculator suggests the minimum disk count required to reach that usable capacity.
Practical design tips for Hikvision NVR storage
1) Prefer measured bitrate over guessed bitrate
Check real stream bitrate from live system stats after camera settings are finalized.
2) Use recording strategy to reduce storage
Motion or event-based recording can dramatically reduce required TB, especially at night or in low-traffic zones.
3) Add overhead for growth
Include at least 10-20% extra for future cameras, seasonal motion spikes, and bitrate fluctuations.
4) Match RAID choice to risk tolerance
RAID improves resilience but reduces usable capacity. For critical sites, capacity loss is usually worth it.
Common mistakes to avoid
- Using maximum camera bitrate instead of average or vice versa without context.
- Forgetting that RAID 1/5/6 changes usable space.
- Ignoring frame rate and scene complexity when estimating bitrate.
- Skipping overhead and ending up with retention shorter than policy requirements.
- Mixing decimal TB and binary TiB assumptions inconsistently.
Final thoughts
This disk calculator for Hikvision projects gives a fast, realistic estimate for CCTV storage planning. Use it as your baseline, then validate with real traffic from your cameras and recorder logs. A small amount of upfront sizing work can prevent expensive storage upgrades later.