NSI Security Planning Tool

Storage Calculator & Network Requirements

Use this guide to estimate surveillance hard drive storage needs, recording retention, camera bandwidth, PoE planning, and remote viewing requirements for CCTV and IP camera systems.

NVR / DVR Storage Hard Drive 32MP Ready Bitrate Planning

Plan storage, bandwidth, PoE, and remote viewing before ordering equipment.

Planning Notice: Storage estimates are for planning purposes only. Actual recording time may vary depending on camera resolution, bitrate, compression, frame rate, motion activity, AI detection settings, lighting, recording schedule, firmware, hard drive condition, and system configuration.

Calculator Quick Estimates 32MP Bitrate Formula Network Get Help

Interactive Estimate

Build Your Storage Estimate

Enter your camera count, bitrate, recording hours, and retention goal. This calculator gives a general storage estimate to help plan the correct hard drive size.

Estimated Result

Daily Storage

351.6 GB

Total Storage

10.3 TB

Suggested HDD

12 TB+

Tip: Always add extra storage headroom. Usable hard drive capacity may be lower than advertised, and actual recording time changes with bitrate, scene activity, codec, and recording schedule.

What Affects Storage?

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Camera Count

More cameras require more storage and more network bandwidth.

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Resolution

2MP, 4MP, 5MP, 8MP / 4K, 12MP, 16MP, and 32MP cameras use different storage amounts.

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Recording Schedule

24/7 recording uses more storage than motion, event, or scheduled recording.

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Bitrate & Codec

H.265, smart codec, bitrate, FPS, and scene activity can change storage usage.

Quick Storage Estimates

System Example Cameras Bitrate Recording Retention Estimated Storage Suggested HDD
Small System 4 2048 Kbps 24/7 30 Days Approx. 2.65 TB 4 TB+
Medium System 8 4096 Kbps 24/7 30 Days Approx. 10.55 TB 12 TB+
Large System 16 4096 Kbps 24/7 30 Days Approx. 21.09 TB 24 TB+
Motion / Event Recording 8 4096 Kbps 12 hrs/day 30 Days Approx. 5.27 TB 6 TB+
Single 32MP Standard 1 16384 Kbps 24/7 30 Days Approx. 4.94 TB 6 TB+
Four 32MP Cameras 4 16384 Kbps 24/7 30 Days Approx. 19.78 TB 24 TB+

32MP High-Resolution Camera Bitrate Planning

32MP cameras, panoramic cameras, and multi-sensor cameras can use much higher bitrate than standard 4MP or 8MP cameras. Storage and network planning should allow extra headroom, especially for 24/7 recording, high frame rate, wide scene coverage, busy scenes, or multiple users viewing remotely.

Camera Type Suggested Bitrate Daily Storage / Camera 30-Day Storage / Camera Planning Note
32MP Low / Smart Codec 12288 Kbps Approx. 126.6 GB / day Approx. 3.7 TB Best for low activity or smart codec recording
32MP Standard 16384 Kbps Approx. 168.8 GB / day Approx. 4.9 TB Good planning estimate for many 32MP systems
32MP High Quality 24576 Kbps Approx. 253.1 GB / day Approx. 7.4 TB Recommended for higher detail or busier scenes
32MP Max / Very High Detail 32768 Kbps Approx. 337.5 GB / day Approx. 9.9 TB Use only when maximum quality is required

32MP Planning Tip: A single 32MP camera may use as much storage as several standard cameras. Always confirm the actual camera bitrate, compression, frame rate, scene activity, and recorder capability before choosing hard drive size.

Storage Calculation Formula

Step 1: Daily Storage

Daily GB = Bitrate Kbps × Cameras × Hours Per Day × 3600 ÷ 8 ÷ 1024 ÷ 1024

Step 2: Total Storage

Total GB = Daily GB × Number of Days
Total TB = Total GB ÷ 1024

Retention Days

Estimated Days = Installed Storage GB ÷ Daily Storage GB

Network Requirements

1–4 Cameras

100 Mbps minimum may work for small systems. Gigabit is still preferred for smoother performance.

8–16 Cameras

Gigabit network is recommended. Plan PoE budget, uplink speed, and NVR bandwidth carefully.

32+ Cameras

Use a planned camera network, proper switches, uplinks, storage, and bandwidth design.

32MP Cameras

Gigabit network, H.265 / smart codec, and properly planned recorder incoming bandwidth are strongly recommended.

System Type Network Recommendation Compression Main Stream Bitrate Sub-Stream Bitrate
2MP Cameras 100 Mbps may work / Gigabit preferred H.265 recommended 1024–2048 Kbps 256–512 Kbps
4MP Cameras Gigabit preferred H.265 / smart codec recommended 2048–4096 Kbps 512–1024 Kbps
8MP / 4K Cameras Gigabit recommended H.265 / smart codec strongly recommended 4096–8192 Kbps 512–1024 Kbps
32MP Cameras Gigabit / planned network strongly recommended H.265 / smart codec strongly recommended 12288–32768 Kbps 1024–2048 Kbps

Remote Viewing Tip: You do not always need extremely fast internet, but you do need stable upload speed at the camera/NVR location. Viewing fewer cameras or using sub-stream can improve remote viewing performance.

Storage Optimization Tips

Use H.265 / Smart Codec

H.265 and smart codec options may reduce storage usage compared to older compression settings.

Adjust Bitrate

Lower bitrate can reduce storage usage, but setting it too low may reduce image quality.

Use Motion Recording

Motion or event recording can reduce storage usage compared to full 24/7 recording.

Use Sub-Stream Remotely

Sub-stream can help remote viewing run more smoothly when internet upload speed is limited.

Need Help Choosing?

Tell us how many cameras you need, the camera resolution, desired recording days, and whether remote viewing is needed. NSI Security can help recommend recorders, hard drives, PoE switches, mounts, junction boxes, and accessories for your project.

Business Hours: Monday–Friday, 9:00am–6:00pm Eastern Time

Phone: 856-317-0600