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Digital

How many hours of video fit in my storage?

Convert storage, video and audio bitrates, stream count, and recording schedule into footage hours and retention days.

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Formula version 2.0.0 · Last reviewed 2026-09-13

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Calculator inputs and results

Editable example values

Presets are screen-recording examples. Variable bitrate, container, and filesystem overhead change actual duration.

Quality and bitrate vary by platform, codec, and scene. Choose an example, then replace it with an observed value.
Mbps
kbps
Advanced settings
%
hours
%
How far baseline usage may move up or down. It provides the basis for the result range.

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Check your inputs, then calculate

Changing an input immediately clears the previous result so conditions cannot be mixed up.

Formula and assumptions

Recording hours show how long all entered streams can record simultaneously, rather than adding each camera's hours together. Calendar days reflect your daily recording schedule; with loop recording, this approximates how long footage is kept before being overwritten.

Convert usable storage to bits and each stream's combined video and audio bitrate to bits per second. Divide storage bits by the total bitrate of all streams, then convert seconds to hours. Divide those hours by recording hours per day to estimate calendar days.

Why the result can vary

Variable bitrate, scene motion, codec settings, container overhead, metadata, snapshots, and decimal-versus-binary storage displays change actual capacity.

Example

Check one continuous recording stream

Inputs: 500GB available, 10Mbps video, one stream, no audio

Outcome: Using decimal units, that is about 400,000 seconds, 111 hours, or 4.6 days of continuous footage.

Cautions

  • The calculator does not invent bitrate from a compression-preset name.
  • For required evidence retention, validate with actual data generated by the equipment.

Frequently asked questions

Are Mbps and MB/s the same?

No. Lowercase b is bits and uppercase B is bytes; one byte is eight bits. This input is Mbps.

Do two cameras double storage time?

The opposite. Two equal-bitrate streams double total data rate and roughly halve retention.

How do I enter motion-only recording?

Estimate the average hours actually recorded each day. Use a wider range if motion frequency changes substantially.

Video recording time and CCTV retention calculator guide

Calculate total recording hours from storage and video plus audio bitrate, then estimate retention days for your cameras and recording schedule.

  • Enter the space actually available for recording rather than full disk capacity, and include both video and audio bitrate.
  • Distinguish Mbps from MB/s. Also check the number of streams and hours recorded each day.

Guide updated