ProRes File Size Estimator
Estimate recording size for Apple ProRes workflows (editing, archiving, and media planning).
How this ProRes size calculator works
ProRes is an editing-friendly codec family, but file sizes can vary a lot depending on codec flavor, frame rate, and resolution. This calculator gives you a practical estimate for storage planning by starting from widely used ProRes baseline bitrates at 1080p/29.97, then scaling up or down for your selected dimensions and fps.
If you are trying to answer questions like “How big is ProRes 422 HQ at 4K?”, “How much SSD do I need for a shoot day?”, or “Can this media fit on my RAID?”, this tool is designed for exactly that.
Reference ProRes bitrate table (1080p at 29.97 fps)
| Codec | Approx. Mbps | Typical Use |
|---|---|---|
| ProRes 422 Proxy | 45 Mbps | Offline editing, light proxies |
| ProRes 422 LT | 102 Mbps | Efficient acquisition and editorial |
| ProRes 422 | 147 Mbps | General purpose mastering/editing |
| ProRes 422 HQ | 220 Mbps | Higher quality finishing pipelines |
| ProRes 4444 | 330 Mbps | High-end post, graphics, alpha workflows |
| ProRes 4444 XQ | 500 Mbps | Maximum quality, VFX-heavy projects |
Why your real-world file size may differ
1) Container and metadata overhead
MOV wrapper data, reel metadata, audio layout details, and timecode tracks introduce overhead beyond pure video bitrate.
2) Audio configuration
Multi-channel production audio can add up quickly. A 24-bit, 48 kHz, 8-channel configuration is much larger than stereo. This calculator includes uncompressed PCM audio so your estimate is closer to reality.
3) Frame rate and raster size
Doubling frame rate roughly doubles data rate. Likewise, jumping from 1080p to 4K dramatically increases pixel count, so storage use rises accordingly.
Quick storage planning tips for ProRes workflows
- Plan 20% to 30% extra space for safety, renders, exports, and conforms.
- Separate camera originals from working media and cache files.
- Keep at least two backup copies for active productions.
- For multicam edits, estimate all angles together, not just hero footage.
- Use proxies when full-resolution ProRes is unnecessary for rough cuts.
FAQ
Is this an exact ProRes file size calculator?
It is an estimate tool, not a byte-accurate predictor. It is highly useful for planning media cards, SSDs, and RAID capacity.
Can I use this as a 4K ProRes calculator?
Yes. Choose 3840×2160 (UHD) or 4096×2160 (DCI), set your fps, codec, and duration, and the result gives estimated clip and total sizes.
Does this work for ProRes 422 HQ size estimates?
Absolutely. Select ProRes 422 HQ and your project settings to get expected GB/GiB usage and data rate per second.