ARRI Data Calculator
Estimate recording data rates, storage consumption, card planning, and post-production media impact for common ARRI workflows. This calculator is designed for camera assistants, DITs, producers, post supervisors, and owner-operators who need a fast storage estimate before a shoot or during prep.
Hourly Data
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Clip Data
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Expert Guide to Using an ARRI Data Calculator
An ARRI data calculator is a planning tool that estimates how much media, on-set storage, and backup capacity you will need when recording on ARRI cameras. In practical production terms, the calculator answers a simple but financially important question: how much data will this shooting format generate over the course of a take, an hour, a day, or an entire production schedule? For productions using ALEXA 35, ALEXA Mini LF, AMIRA, or related workflows, the answer can vary dramatically depending on codec, resolution, frame rate, and shooting ratio.
Data planning matters because camera originals are one of the most expensive assets generated during principal photography. If you underestimate your needs, the production may face card shortages, transfer delays, backup congestion, and overtime in dailies or transcoding. If you overestimate too aggressively, you may rent or purchase storage that sits unused. A disciplined ARRI storage estimate helps camera, DIT, production management, and post teams make decisions with more confidence.
Key idea: the true cost of a recording format is not only camera media. It also includes transfer time, checksum verification, backup replication, nearline storage, editorial transcodes, and archive preservation.
What an ARRI data calculator actually measures
At the most basic level, a camera data calculator converts a recording data rate into a storage quantity. If a codec records at a certain number of megabytes per second, that figure can be multiplied by 60 seconds, 60 minutes, or the exact clip duration to estimate total storage. The challenge is that ARRI workflows are not all identical. ARRIRAW and ProRes options produce very different data volumes, and frame-rate changes can increase throughput significantly. The same production can move from modest daily data loads to multiple terabytes per day just by switching the acquisition format or increasing the shooting ratio.
Most real-world workflows evaluate the following inputs:
- Camera family: different ARRI systems support different recording modes and practical workflows.
- Codec: ARRIRAW is typically the most data-intensive option, while ProRes variants can reduce storage pressure.
- Resolution: larger rasters require more data, all else being equal.
- Frame rate: higher fps generally means more frames written per second and more storage consumed.
- Duration: the length of recorded material.
- Shooting ratio: the ratio between final runtime and recorded footage, often a major multiplier for total storage.
- Backup policy: one original plus one or more verified copies can double or triple your total required storage.
Why ARRI productions need careful data forecasting
ARRI cameras are widely used in high-end commercial, episodic, documentary, and feature production because of their image quality, color science, highlight handling, and robust professional workflows. That same quality often comes with premium data rates. A production shooting ARRIRAW at higher resolutions or elevated frame rates can generate enough media to affect everything from card rotation on set to overnight network transfers.
For example, if a show records around 1 TB per hour and captures six hours of actual camera roll across multiple setups in a day, then original camera data alone may exceed 6 TB before any duplication. With a two-copy backup policy, that can quickly become 18 TB of same-day storage activity when you include source and backup destinations. Add dailies generation and editorial proxies, and the total operational footprint rises further.
Sample comparative data rates
The table below shows practical, rounded examples often used in preproduction budgeting. Actual values depend on exact ARRI mode, firmware, raster, compression choice, and frame rate, but these figures are useful for planning discussions.
| Recording Format | Typical 24 fps Planning Rate | Approximate GB per Hour | Best Use Case |
|---|---|---|---|
| ARRIRAW 4.6K / Open Gate class | 300 MB/s | 1,080 GB/hour | Maximum image flexibility, VFX-heavy work, premium finishing |
| ProRes 4444 XQ 4K class | 170 MB/s | 612 GB/hour | High-end acquisition with more efficient storage than RAW |
| ProRes 4444 4K class | 125 MB/s | 450 GB/hour | Premium capture with strong quality and manageable data loads |
| ProRes 422 HQ 4K class | 85 MB/s | 306 GB/hour | Efficient acquisition for extended roll times and lighter post loads |
These examples reveal why an ARRI data calculator is so useful. The difference between 306 GB/hour and 1,080 GB/hour is not just a spreadsheet concern. It can determine whether your media cart needs one stack of drives or an entire data-wrangling strategy with more assistants, more checksum stations, and faster interfaces.
How frame rate changes data requirements
Frame rate is one of the most commonly overlooked variables in preproduction. Many teams estimate storage at 23.976 or 24 fps and forget that selected sequences may be shot at 48, 60, 96, or higher. Because more frames are written every second, storage requirements rise roughly in proportion to frame rate in many planning scenarios. A jump from 24 fps to 48 fps can nearly double your estimate. A jump to 60 fps can add 150% of the original 24 fps burden. If you schedule multiple days of high-speed photography, card turnover and offload windows must be modeled separately instead of being folded into a single average daily rate.
| Base Format Example | 24 fps | 48 fps | 60 fps | 120 fps |
|---|---|---|---|---|
| ARRIRAW at 300 MB/s base | 1,080 GB/hour | 2,160 GB/hour | 2,700 GB/hour | 5,400 GB/hour |
| ProRes 4444 XQ at 170 MB/s base | 612 GB/hour | 1,224 GB/hour | 1,530 GB/hour | 3,060 GB/hour |
| ProRes 422 HQ at 85 MB/s base | 306 GB/hour | 612 GB/hour | 765 GB/hour | 1,530 GB/hour |
Understanding shooting ratio in storage planning
Shooting ratio compares the total amount of material recorded to the final finished runtime. If a 10-minute final sequence is expected to produce 80 minutes of recorded footage, the shooting ratio is 8:1. This number varies a lot by project type. Documentary and vérité styles may run high due to long observational takes. Commercials can also run high because of multiple versions, performance options, and speed changes. Scripted narrative work may stay tighter, but additional coverage, resets, and alternate takes can still increase actual roll time.
That is why the calculator above includes a shooting ratio input. Even when the codec data rate is known, the ratio often becomes the bigger production-level multiplier. A camera test showing 450 GB/hour may seem manageable, but if the project shoots many hours of usable material each day and maintains multiple backups, total storage can scale quickly into tens of terabytes.
Card count versus total storage
Many producers focus first on how many cards are needed on set. That is important, but it is only one layer of planning. Camera cards need to be large enough to avoid interrupting shooting and numerous enough to sustain a card-rotation cycle while DIT or data management tasks are in progress. However, the card plan should be linked to total storage planning. If your project records 7 TB of camera originals per day and uses a 2 TB card size, the issue is not just needing four cards to hold the data. The issue is whether your offload stations can verify, duplicate, and clear those cards fast enough to keep pace with production.
- Estimate total recorded data from codec, raster, fps, and duration.
- Apply the shooting ratio or expected roll volume for the schedule.
- Multiply by backup copy count.
- Calculate how many cards are required to avoid delays between offloads.
- Add overhead for dailies, proxies, and archive packaging.
Recommended workflow assumptions for realistic budgeting
In professional camera and post pipelines, a good estimate usually includes more than the exact raw storage number. Experienced teams often budget for:
- Original camera negative: the primary recorded files.
- Verified on-set backup: at least one duplicate, often two.
- Nearline post storage: a working copy for editorial, color, or conform.
- Transcodes and proxies: lower-bitrate files for editorial or remote review.
- Long-term archive: retained masters stored according to the project’s delivery and preservation requirements.
If your estimator only accounts for the card volume, it may understate the real infrastructure requirement by a wide margin. An ARRI data calculator becomes more valuable when it is used as a decision-support tool rather than a simple card math widget.
How this calculator estimates ARRI data usage
The calculator on this page uses practical baseline throughput assumptions for common ARRI-style planning scenarios. It scales those assumptions based on selected codec, camera family, raster class, and frame rate. The output then estimates:
- Approximate data generated per hour.
- Approximate data for the entered clip duration.
- Total projected storage after applying the shooting ratio.
- Storage impact of backup copies.
- Approximate number of media cards required for that total.
Because this is a planning calculator, the values should be treated as informed estimates rather than engineering specifications. For mission-critical prep, always validate against the exact camera mode, media type, and current ARRI documentation for your production package.
Best practices when planning an ARRI workflow
First, separate hero acquisition days from lighter schedule days. A production that occasionally shoots high frame rate, VFX plates, or oversized capture modes should not average those demands across the whole schedule if card rotation is tight. Second, model backups honestly. If your show promises original plus two verified copies, your storage estimate should reflect that from the start. Third, include transfer throughput in your planning. A drive system may have enough capacity but still fail operationally if it cannot ingest the daily volume within wrap-to-call turnaround.
It is also wise to consider file-system overhead, formatting differences, and real usable capacity. A labeled 1 TB device does not always provide a full 1,000 GB of practical working space once formatting and operating margins are taken into account. The National Institute of Standards and Technology offers guidance on measurement conventions that can help when discussing decimal and binary storage units with vendors and post teams.
Reference sources for deeper data and archival context
Storage planning should also consider long-term retention and preservation workflows, especially for premium productions. The Library of Congress digital formats resource is a strong starting point for understanding sustainability, file characteristics, and archival concerns associated with digital moving-image formats. If your production involves federally funded work, institutional archiving, or long-term asset management, those guidelines are especially relevant.
For broader technical literacy around frame timing and digital imaging fundamentals, many university film and media programs publish useful background material. Pairing practical camera tests with institutional references can help teams create estimates that are both operationally realistic and easy to defend during budgeting conversations.
Final takeaway
An ARRI data calculator is most valuable when used early and updated often. During bidding and budgeting, it helps estimate media rentals, storage purchases, DIT staffing, and post requirements. During prep, it helps determine card quantity, dump-station throughput, and backup procedures. During production, it becomes a quick operational check for roll planning, overtime risk, and day-end copy windows. And in post, it provides context for whether the editorial, color, and archive pipeline can absorb the actual volume created on set.
If you are comparing formats, the best workflow is not always the one with the smallest number. Instead, it is the one that aligns image goals with realistic storage, backup, and finishing resources. Use the calculator above to model your likely shooting conditions, then validate those numbers with your camera rental house, DIT, post supervisor, and current camera package documentation. For additional context on digital preservation and storage terminology, you may also review guidance from the U.S. National Archives.