ARRI ALEXA 35 Storage Calculator
The ARRI ALEXA 35 is a 4.6K Super 35 cinema camera that records ARRIRAW (13-bit) and Apple ProRes 4444 XQ / 4444 / 422 HQ. This page covers the storage math for every supported format, with bitrates verified against ARRI's published data rate tables.
ARRI ALEXA 35 Recording Formats
ARRI publishes bitrates at 25 fps PAL baseline; rates scale linearly with frame rate (60p = 2.4× the 25p value). The ALEXA 35 supports 19 distinct recording formats across multiple aspect ratios and resolutions.
| Codec | Resolution | Frame rate | Bitrate |
|---|---|---|---|
| ARRIRAW 4.6K 3:2 Open Gate | 4608×3164 | 25p | 4644 Mbps |
| ARRIRAW 4.6K 3:2 Open Gate | 4608×3164 | 60p | 11,146 Mbps |
| ARRIRAW 4K 16:9 | 4096×2304 | 25p | 6625 Mbps |
| ARRIRAW 4K 16:9 | 4096×2304 | 120p | 31,800 Mbps |
| ProRes 4444 XQ 4K 16:9 | 4096×2304 | 25p | 1851 Mbps |
| ProRes 4444 XQ UHD | 3840×2160 | 25p | 1629 Mbps |
| ProRes 4444 UHD | 3840×2160 | 25p | 1091 Mbps |
| ProRes 422 HQ UHD | 3840×2160 | 25p | 733 Mbps |
Recording Media — CODEX Compact Drive
The ALEXA 35 records to CODEX Compact Drive 1 TB or 2 TB. The Compact Drive is a proprietary ARRI/CODEX media format — typically rented or purchased through ARRI rental houses, not consumer retailers like Amazon. For offload and proxy workflows, ARRI shoots commonly pair the Compact Drive with USB-C SSDs.
ARRI ALEXA 35 Storage — Quick Examples
| Setting | 1 minute | 1 hour | 2 TB drive holds |
|---|---|---|---|
| ARRIRAW 4.6K Open Gate 24p | 33.4 GB | 2.01 TB | ~60 min |
| ARRIRAW 4.6K Open Gate 50p | 69.7 GB | 4.18 TB | ~29 min |
| ProRes 4444 XQ 4K 16:9 24p | 13.3 GB | 800 GB | ~2 hr 30 min |
| ProRes 422 HQ UHD 24p | 5.3 GB | 317 GB | ~6 hr 18 min |
Frequently Asked Questions
What bitrate does the ARRI ALEXA 35 record at?
The ALEXA 35 records ARRIRAW (13-bit) and ProRes 4444 XQ / 4444 / 422 HQ. At 25 fps baseline, ARRIRAW 4.6K Open Gate runs 4644 Mbps, ARRIRAW 4K 16:9 runs 6625 Mbps, and ProRes 422 HQ UHD runs 733 Mbps. Bitrates scale linearly with frame rate.
How much storage does the ARRI ALEXA 35 need per hour?
At ARRIRAW 4.6K Open Gate 24p, about 33.4 GB per minute / 2.01 TB per hour. ProRes 4444 XQ 4K 16:9 24p is ~800 GB/hour. ProRes 422 HQ UHD 24p is ~317 GB/hour.
What media does the ARRI ALEXA 35 use?
CODEX Compact Drive 1 TB or 2 TB — proprietary rental/cinema media. Not available on Amazon. Most productions rent these through ARRI rental houses.
What's the difference between ARRIRAW and ProRes on the ALEXA 35?
ARRIRAW is uncompressed 13-bit RAW; ProRes 4444 XQ / 4444 / 422 HQ are 12-bit compressed YCbCr at varying quality tiers. ARRIRAW gives ~2-3× the file size of ProRes 4444 XQ for the same resolution.