Security Camera Bandwidth Calculator
What the Security Camera Bandwidth Calculator does
The Security Camera Bandwidth Calculator estimates how much network bandwidth is needed to carry simultaneous security camera video streams. It combines the number of cameras, the configured bitrate of each stream, the number of simultaneous streams per camera, and an allowance for network overhead.
The result, labeled Estimated Bandwidth, is shown in megabits per second (Mbps). It represents the estimated capacity needed on a network link carrying all the streams you entered. This can help you assess whether a connection has enough room for camera traffic or compare different camera settings before adding more devices.
The calculator assumes that every camera uses the same entered bitrate and the same number of simultaneous streams. Actual usage can change with camera settings, scene activity, and network conditions. The default values are illustrative, so replace them with values that reflect your system whenever possible.
How to use the Security Camera Bandwidth Calculator
Gather the stream settings for your cameras, then enter the following values:
- Number of cameras: Enter the number of cameras whose streams will travel over the network link you want to assess. The calculator accepts 1 to 1,000 cameras.
- Bitrate per stream (Mbps): Enter the configured or expected bitrate for each stream in megabits per second. The accepted range is 0.1 to 100 Mbps. Check your camera or recorder settings for a relevant value.
- Simultaneous streams per camera: Enter how many streams from each camera will be carried over that link at the same time. You can enter 1 to 10. Each stream is assumed to use the full bitrate entered above.
- Network overhead allowance (%): Enter a percentage from 0% to 100% to allow for additional network traffic associated with carrying the streams.
Read the Estimated Bandwidth result in Mbps. Compare it with the usable capacity of the particular network link you are evaluating, and remember to account separately for other devices and services using that link.
Use the number of streams that actually cross the link at the same time. For example, a camera might send video to a recorder on the local network while a separate stream is viewed remotely. Whether both streams affect a particular link depends on the way the camera system and network are configured.
How the Security Camera Bandwidth Calculator formula works
The calculator first multiplies the number of cameras by the bitrate per stream and the number of simultaneous streams per camera. It then adds the chosen overhead allowance as a percentage of that total.
Estimated Bandwidth = Number of cameras × Bitrate per stream × Simultaneous streams per camera × (1 + Network overhead allowance ÷ 100)
For example, the default settings assume four cameras, a bitrate of 4 Mbps per stream, one simultaneous stream per camera, and a 10% overhead allowance. These rates and the allowance are illustrative assumptions:
- Four cameras × 4 Mbps × one stream = 16 Mbps of estimated video traffic.
- A 10% allowance adds 1.6 Mbps.
- The resulting Estimated Bandwidth is 17.60 Mbps.
As another assumed example, eight cameras at 2.5 Mbps per stream, with two simultaneous streams each and a 20% allowance, produce an estimate of 48.00 Mbps. The base stream total is 8 × 2.5 × 2 = 40 Mbps; adding 20% brings it to 48 Mbps.
Both examples assume that every specified stream crosses the network link being evaluated. They do not include bandwidth used by unrelated network activity.
Use cases for the Security Camera Bandwidth Calculator
Planning a new camera system. Before installing cameras, use the expected stream settings to estimate the combined traffic on the links that will carry their video. This gives you a starting point for assessing network capacity.
Adding cameras to an existing setup. Estimate the traffic from the additional cameras and consider it alongside the existing camera traffic and other network usage. If the existing and new cameras use different bitrates, calculate the groups separately and add their estimates.
Comparing stream settings. Run estimates using different assumed bitrates to see how a change in camera configuration could affect total bandwidth. Use values supported by your equipment and verify actual usage after making changes.
Planning for simultaneous viewing. If multiple streams from each camera will cross the same link at once, enter the appropriate stream count. This can help you account for viewing or recording arrangements that generate more than one stream per camera.
Assessing a shared connection. Estimate camera traffic on a link and compare it with the capacity available after allowing for other users and devices. The calculator’s overhead allowance covers additional traffic associated with the estimate; it does not automatically include unrelated network usage.
Other factors to consider when calculating Estimated Bandwidth
Resolution and frame rate: Higher resolution or more frames per second can require a higher bitrate, depending on compression and camera settings. The calculator does not derive bitrate from these settings, so enter a bitrate that matches the stream you want to estimate.
Compression and scene activity: Video encoding settings affect the amount of data a stream uses. With variable bitrate, a busy scene may use more bandwidth than a quiet one. Actual usage can fluctuate, so a single entered value is an estimate rather than a guaranteed maximum.
Different camera bitrates: The formula applies one bitrate and one stream count to every camera. If your system contains groups with different settings, estimate each group separately and add the results for the link they share. Apply an appropriate overhead allowance consistently when combining the estimates.
Main streams and substreams: A lower-bitrate substream may use less bandwidth than a camera’s main stream. Because this calculator assumes each simultaneous stream has the entered bitrate, estimate streams with different bitrates separately instead of treating them as identical.
Local and internet traffic: The result does not distinguish local network traffic from internet upload traffic. Identify which streams cross the link you are evaluating. Video sent to a local recorder may follow a different path from video sent to a remote viewer or cloud service.
Other network usage: Computers, phones, video calls, downloads, and other services can share the same connection. Their traffic is outside the calculator’s result and should be considered separately when deciding whether sufficient capacity is available.
Storage requirements: Bandwidth describes the rate at which data travels; storage describes the amount of data retained over time. This calculator does not estimate recording capacity or how long footage can be stored.
Security Camera Bandwidth Calculator FAQ
How much bandwidth does a security camera use?
It depends on the stream’s bitrate and how many copies of that stream cross the network link. Resolution, frame rate, compression, scene activity, and camera settings can all affect the bitrate. For a useful estimate, enter the configured or expected bitrate for your camera rather than relying on a generic figure.
Does every camera stream use internet upload bandwidth?
No. A stream affects internet upload capacity when it travels from your network to a remote destination. A stream sent to a recorder over the local network may remain on the local network. Check the path used by each stream when deciding which connection to assess.
What should I enter for simultaneous streams per camera?
Enter the number of streams from each camera that will cross the network link at the same time. The calculator assumes they all use the entered bitrate. If a main stream and a substream have different bitrates, estimate them separately and add the results.
What does the network overhead allowance cover?
It adds a percentage to the calculated stream total to allow for additional network traffic associated with carrying the video. The appropriate allowance depends on the system and network. It does not include unrelated traffic from other devices or services.
Can I use the result to calculate video storage?
No. The result estimates bandwidth in Mbps for simultaneous streams on a link. Storage also depends on recording duration, recording schedules, bitrate over time, and other system settings, so it requires a separate calculation.