Frigate NVR storage sizing

Frigate Storage Calculator: Camera Bitrate and Retention

Frigate storage should be sized from the video that will actually be recorded, not from a generic “GB per camera” rule. Camera bitrate, codec, resolution, scene complexity, recording mode and retention all change the answer. This calculator converts average Mbps into daily and retention storage, applies the recording duty cycle, and adds planning headroom before showing current surveillance HDD and SSD options.

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Quick answer

What this Frigate workload needs

Use the average recording-stream bitrate from your camera configuration whenever possible. Continuous recording uses the full duty cycle; event-focused recording should use a realistic percentage of the day rather than assuming motion is rare. Add at least 15–20% free-space headroom and leave extra capacity if retention, bitrate or camera count may increase.

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Current products that fit this decision

These listings come from this sprint's dedicated Amazon catalogue. Barebones systems, accessories, camera kits, enclosures, replacement batteries, unrelated product classes and obvious multipacks are excluded by the normalizer.

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Buying decision

Match the hardware to the bottleneck

HDDs are usually the best value for multi-terabyte NVR retention. SSDs are useful for smaller, silent systems and can handle NVR workloads when endurance and capacity fit, but price per TB is usually higher. Frigate generally recommends local storage for recordings because NAS introduces additional network and availability dependencies.

Interactive decision tool

Frigate Storage Calculator

Use the workload inputs to size a practical Frigate hardware tier before comparing live products. Results are planning guidance; verify current Frigate support, camera bitrates and the exact hardware configuration before deployment.

Compatibility checklist

Four checks before you purchase

Use hardware video decoding

A detector does not decode camera streams. Verify Intel, AMD or NVIDIA hardware acceleration separately.

Size by simultaneous activity

Busy overlapping cameras can require more detector throughput than a larger but quiet camera count.

Use supported detector hardware

Compare Hailo, OpenVINO, supported GPUs and other current Frigate detector paths before buying.

Calculate storage from bitrate

Retention depends on recording bitrate, duty cycle and days kept—not a fixed TB-per-camera rule.

Bitrate is the most useful storage input

Resolution and FPS influence storage, but the recording bitrate is what directly determines bytes written. Two 4K cameras can use very different space if one is configured at 4Mbps and another at 12Mbps. Variable bitrate also changes with scene complexity. Use a measured or camera-reported average over representative days when possible. If only a target bitrate is known, treat the calculator as a planning estimate and leave more headroom.

Continuous recording is easy to model

For continuous recording, each camera writes video all day. The basic calculation is cameras multiplied by average Mbps, converted to bytes, multiplied by seconds per day and retention days. Audio and container overhead are usually small relative to the video stream but still justify free-space reserve. The calculator reports raw footage and a headroom-adjusted target so the volume is not designed to operate near 100% full.

Event recording needs a realistic duty cycle

Motion or event-focused recording can dramatically reduce storage, but the savings depend on the scene. A quiet backyard might record a small fraction of the day, while a road-facing camera may be active for hours. Use a percentage that reflects actual activity rather than selecting an optimistic value to make the drive size smaller. Security requirements may also favor retaining continuous footage even when object events are indexed separately.

H.265 can reduce bitrate but affects compatibility

Frigate's camera guidance notes that H.265 generally provides better compression but has less universal playback compatibility than H.264. Storage savings are valuable in large systems, but client playback and hardware decode support should be tested. Do not switch codecs solely to hit a smaller disk target without confirming the browsers, apps and hardware acceleration paths used by the installation.

Surveillance HDDs maximize capacity per dollar

For long retention windows, large 3.5-inch surveillance HDDs remain economical. Seagate SkyHawk/SkyHawk AI and WD Purple/Purple Pro families are built for surveillance workloads. The exact drive should be selected by capacity, workload, warranty and current price rather than brand loyalty. Cloudzat's live catalogue focuses on these families so the calculator result can be matched to real drive sizes instead of generic storage advice.

SSDs are valid for smaller NVRs

Frigate's planning guidance says modern SSD endurance is much less of a concern than it was historically and notes their responsiveness, silence and efficiency. For four or eight cameras with modest retention, an SSD can produce a compact and quiet design. Check TBW/endurance, thermal behavior and cost. For dozens of terabytes, HDD economics normally win unless all-flash characteristics justify the premium.

Local storage is the reliability baseline

Frigate supports NFS and SMB recording, but network storage adds latency and another failure domain. Local SSD/HDD storage lets recording continue even if the NAS, switch uplink or storage network has a problem. When NAS recording is necessary, use wired gigabit or faster networking and make sure the NAS can sustain continuous writes while also serving its other workloads.

RAID changes usable capacity, not the video math

The calculator estimates the video volume before redundancy. If recordings live on RAID, ZFS or another redundant pool, convert the required usable capacity into raw drive capacity separately. Mirroring roughly doubles raw capacity for the same usable space; parity layouts have different overhead. RAID can improve availability after a drive failure, but it is not a backup of footage against deletion, corruption or a whole-system loss.

Retention policy can be tiered

Frigate supports retention based on motion, detections and alerts, which means not every recording category needs the same number of days. A site might keep general motion footage for a week and important alert footage longer. Model the largest always-retained stream conservatively, then treat longer event retention as additional margin. A tiered policy can provide better incident coverage without keeping every camera continuously for the maximum period.

Free space is operational capacity

A 16TB drive is not a promise that every byte should be allocated to recordings. Filesystem overhead, database activity, temporary spikes in bitrate and maintenance all benefit from free space. Cloudzat adds headroom to the raw estimate and recommends stepping up a drive size when the target is close to a capacity boundary. Consistently full recording volumes are harder to manage and leave no room for changes.

Drive replacement should be part of the plan

NVR disks are wear items and should be monitored. Keep model information, warranty status and SMART health visible, and have a replacement process that does not require redesigning the entire server. Multi-drive systems should be physically cooled and labeled. For critical deployments, retaining an incident elsewhere is more important than relying on the live recording volume as the only copy.

Recalculate after camera tuning

The most accurate storage plan comes after the cameras are installed and configured. Measure actual bitrate after changing codec, FPS, resolution and quality settings. Run the calculator again using observed values. This can reveal that a planned 24TB drive is unnecessary—or that the original estimate was too low because several cameras generate much higher variable bitrate than expected.

Questions people ask

Frigate Storage Calculator questions

How much storage does Frigate use per camera?

It depends mainly on recording bitrate, recording duty cycle and retention. Use Mbps rather than a fixed GB-per-camera rule.

How do I calculate NVR storage from Mbps?

Convert Mbps to bytes per second, multiply by seconds per day, camera count and retention days, then apply recording duty cycle and free-space headroom.

How much free space should I leave?

A 15–20% planning reserve is a practical minimum. Leave more if camera count, bitrate or retention may increase.

Is HDD or SSD better for Frigate?

HDD is usually better value for large long-term retention. SSD is quiet, responsive and valid for smaller or all-flash systems when endurance and capacity fit.

Can I record Frigate directly to NAS?

Yes, but Frigate generally recommends local recordings for best reliability. NAS adds network and storage dependencies.

Does H.265 save Frigate storage?

It can reduce bitrate for similar quality, but playback and hardware compatibility should be verified before standardizing on it.

Does detection FPS affect recording storage?

Not directly if recording uses a separate stream. Recording bitrate and the record stream settings determine footage size.

Does RAID reduce the required footage capacity?

No. RAID changes how much raw disk is needed to provide a given usable capacity. The video data volume is unchanged.

Should I buy exactly the calculated drive size?

Usually choose the next practical capacity with free-space and growth headroom, especially when the estimate is close to a drive boundary.

How often should I recalculate storage?

Recalculate after camera settings change, when cameras are added, or after measuring actual bitrate and retention behavior in production.

Official references and methodology

Verify current Frigate support before deployment

Cloudzat's calculator uses bitrate arithmetic and a configurable recording duty cycle, then adds planning headroom. It does not invent camera compression ratios or promise exact retention. Live drive listings come from this sprint's dedicated Amazon catalogue and are filtered for internal surveillance HDDs or internal SSDs.

As an Amazon Associate, Cloudzat may earn from qualifying purchases. Prices, seller terms, exact configurations, camera firmware and Frigate support can change.