Estimate ProRes Recording Size
Use this calculator to estimate storage needs for Apple ProRes video based on codec, resolution, frame rate, and duration.
How this ProRes file size calculator works
This tool estimates ProRes storage consumption from bitrate. In simple terms, file size is bitrate multiplied by recording duration. Because ProRes data rates vary by flavor (Proxy, LT, 422, HQ, 4444, XQ), the calculator starts with known 1080p29.97 baseline rates and scales based on your selected resolution and frame rate.
The estimate includes optional audio bitrate, multiple audio tracks, multi-camera streams, and a small container overhead so your result is more practical for real-world card and drive planning.
Baseline ProRes rates used by this calculator
- ProRes 422 Proxy: 45 Mbps
- ProRes 422 LT: 102 Mbps
- ProRes 422: 147 Mbps
- ProRes 422 HQ: 220 Mbps
- ProRes 4444: 330 Mbps
- ProRes 4444 XQ: 500 Mbps
These are nominal reference values at 1920x1080 and 29.97 fps. Actual encoder implementations and scene complexity can move results up or down.
Why your real ProRes file size may differ
1) Scene complexity and motion
Fast motion, noise, film grain, water, and detailed textures can increase effective data usage versus clean, static scenes.
2) Recording device implementation
Cameras, external recorders, and NLE exports may implement quality targets differently. Apple ProRes is designed for consistency, but exact files are not always identical.
3) Audio and metadata
Multichannel audio, timecode tracks, metadata streams, and container type can all add overhead beyond pure video bitrate.
Storage planning tips for editors and DITs
- Always reserve at least 15-25% extra space beyond your estimate.
- For field recording, include card swap buffer and backup duplication (2x or 3x total storage).
- For multicam projects, calculate each camera independently, then sum all camera days.
- If you deliver with alpha channels, plan for larger 4444/4444 XQ files.
- Use RAID or fast NVMe scratch storage for smooth playback of higher ProRes profiles.
Quick example
A 1-hour 4K UHD (3840x2160) ProRes 422 HQ recording at 23.976 fps can easily run into hundreds of gigabytes. If you add multiple audio tracks and record two cameras simultaneously, your total can exceed 1 TB for a short session.
FAQ
Is this calculator exact?
No. It is an estimate tool designed for planning and budgeting storage.
Can I use this for ProRes RAW?
Not directly. ProRes RAW has different behavior and data rates, so this calculator is tuned for standard ProRes 422/4444 family workflows.
Should I trust decimal GB or binary GiB?
Both are useful. Drive manufacturers usually use decimal GB/TB, while operating systems often display binary GiB/TiB.