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NVR Retention Days Calculator

Find how many days of footage a given amount of NVR/DVR storage will hold.

Inputs

Saved Scenarios

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Retention Period (days)

24.3

Spark says

How it's calculated

Formula

Days=StorageGB×8×10243Bitratekbps×1000×3600×Hours×CamerasDays = \dfrac{Storage_{GB} \times 8 \times 1024^3}{Bitrate_{kbps} \times 1000 \times 3600 \times Hours \times Cameras}
Storage_{GB}
— Total available NVR/DVR storage

What is the NVR Retention Days Calculator?

This is the inverse of CCTV storage sizing — given a fixed amount of storage, it works out how many days of continuous footage that storage will actually hold.

How to use it

  1. 1 Enter your available NVR/DVR storage.
  2. 2 Enter camera count, bitrate and recording hours per day.

Worked examples

4,000 GB, 8 cameras at 2048 Kbps, 24/7

About 24.3 days of retention.

Try it

Frequently asked questions

How can I extend retention without adding storage?

Lower the bitrate/resolution, switch from continuous to motion-triggered recording, or reduce recording hours per day for low-priority cameras.