Blu-ray Rip Size Calculator

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Blu-ray Rip Size Calculator

Estimate a Blu-ray or 4K UHD rip from video bitrate, runtime, audio tracks, subtitle overhead, source disc size, collection count, and optical drive read speed.

1Rip presets
2Video, audio, and subtitle inputs
Updates the typical video bitrate field.
Use the feature or total episode runtime.
Final encoded video bitrate.
Main track plus commentary or dubs.
AC-3 may be 0.64; lossless can be 3 to 5.
PGS subtitles are small but not zero.
Typical Blu-ray PGS track: 5 to 50 MB.
MKV metadata, chapters, and mux overhead.
3Source disc, collection, and drive inputs
Used for compression ratio and read time.
Actual occupied data, not just label capacity.
Collection storage is file size times this count.
Free space buffer for NAS planning.
Drive speed formula uses x rating times 1x rate.
Only used when custom base is selected.
Example: 6x BD drive reads up to about 27 MB/s.
Accounts for ripper overhead and variable disc speed.
4Results

Estimated rip size

0 GB

Video plus audio, subs, and overhead

Compression ratio

0:1

Source size divided by final rip size

Collection storage

0 TB

Includes selected free-space reserve

Estimated rip time

0 min

From drive speed and effective read rate

Calculation breakdown

Video data formula0 Mbps x 0 min / 8 = 0 GB
Audio overhead formula0 tracks x 0 Mbps x duration = 0 GB
Subtitle and container overhead0 GB
Compression from source disc0 GB source / 0 GB rip
Storage per collection0 rips x 0 GB plus reserve
Drive speed formula0x x 0 MB/s x efficiency = 0 MB/s
5Typical bitrate and size grid
8-12 Mbps 1080p compact

Good for smaller H.264 or H.265 encodes when keeping file size modest matters.

15-25 Mbps 1080p high quality

Common range for strong 1080p Blu-ray rips with fewer visible artifacts.

30-50 Mbps 4K HEVC encode

Typical high-quality 4K UHD encode range, depending on grain and HDR complexity.

60-85 Mbps 4K remux

Near-source UHD remux rates can land here before audio and subtitle tracks.

6Reference tables

1080p and 4K Blu-ray typical sizes

Rip typeTypical video bitrate2 hour video onlyTypical final size
1080p compact encode8 to 12 Mbps7.2 to 10.8 GB8 to 13 GB
1080p high quality encode15 to 25 Mbps13.5 to 22.5 GB15 to 26 GB
1080p remux25 to 40 Mbps22.5 to 36 GB25 to 45 GB
4K efficient HEVC30 to 45 Mbps27 to 40.5 GB30 to 48 GB
4K high quality HEVC45 to 65 Mbps40.5 to 58.5 GB45 to 70 GB
4K UHD remux60 to 85 Mbps54 to 76.5 GB60 to 90 GB

Disc and drive read references

ReferenceNominal valueFormula usePractical note
BD2525 GBSource sizeOften 18 to 24 GB used
BD5050 GBSource sizeOften 35 to 46 GB used
UHD6666 GBSource sizeCommon for many 4K discs
UHD100100 GBSource sizeUsed by larger UHD titles
Blu-ray 1x4.5 MB/sDrive x speed6x is about 27 MB/s peak
UHD BD 1x10.25 MB/sDrive x speedReal reads vary by zone

Common collection examples

LibraryAvg ripCountStorage before reserve
Small 1080p shelf10 GB750.75 TB
Mixed HD collection18 GB2504.5 TB
4K favorites45 GB803.6 TB
4K remux archive75 GB15011.25 TB

Formula reference

ResultFormulaInputsMeaning
Video sizeMbps x seconds / 8 / 1000Bitrate, durationDecimal GB from video stream
Audio overheadTracks x Mbps x seconds / 8 / 1000Audio count, bitrateExtra GB from audio tracks
CompressionSource GB / final GBDisc used, rip sizeHow much smaller than disc data
CollectionRip GB x count x reserveRips, bufferStorage to allocate
Rip timeSource MB / read MB/sDisc size, driveEstimated optical read time
7Practical tips
Bitrate first: Final rip size is mostly bitrate times duration. Audio, subtitles, chapters, and container overhead are smaller but can add several gigabytes on long movies.
Use used disc size: Compression ratio is clearer when the source field is the actual data occupied on the disc, not only the printed BD25, BD50, UHD66, or UHD100 capacity.
Plan NAS headroom: Collection storage includes a reserve because media libraries grow and many file systems prefer free space for normal operation.
Drive time varies: Optical drives do not read at peak speed for the whole disc, so the efficiency setting keeps rip-time estimates closer to real-world reads.
This calculator estimates storage from bitrate math. It does not decrypt discs, recommend bypassing protections, or replace the measured size reported by your encoding or muxing tool.

So you sit down to rip that brand-new 4K UHD movie. High-visual-fidelity, right? Except now all of your storage has dissapears. Your portable drive can’t hold it. Even your main server are barely big enough. You have to consider how much it will cost in space first.

And then there is the hidden costs, the audio tracks, the subtitle files. There’s container overhead to consider as well. That’s why most folks concentrate on video bitrate. It’s understandable, as it represents the bulk of final file size. A good quality 1080p encode are between 15 and 25 megabits per second. A 4K HEVC remux? More like 60 megs or higher.

How to Save Space on Your Drive

Audio tracks also eat into your space. Compressed tracks like AC3 is smaller than lossless ones such as TrueHD. Multiple language dubs will consumes several gigabytes. Use the calculator to see how that tradeoff work. Tinker with the count of audio track. See whether it’s worthwhile to keep all those languages in a set.

Now, know that a BD50 disk holds 50 gigabytes, but not all of it are used. For example, maybe your movie occupy just 35 gigabytes of disc. If so, enter how many GBs of the disc is actualy being used. Enter that into the tool as the “occupied space.” This will give you an idea of what size file you’re saving from compression. Is it a lean source? Or is it bloated? That tell you something about bitrate. If it’s lean, save more; if it’s already big, cut it back.

One big file isn’t a problem. A hundred of them are a project. Plan for terabytes. Think about the size of your growing library. There’s an option on the calculator to add a reserve percentage. That way, it’ll help you plan for what else you might want to buy later on. It’s good practice to leave some free space on your file system. A filled drive will slow down and may becomes corrupted. Set aside 15 or 20 percent as a cushion. Save yourself headaches later. As your collection expand, your drive will have some breathing room.

It doesn’t read at full speed. That’s just how optical drives work. Some places on the disc reads faster, others slower. It has to do with physics. There is an efficiency percentage that goes into calculation. It provides an estimate of time that is reasonably accurate. Conservatism is better then optimism. You don’t wonder why it takes so long. You know when to plan for a rip during a period of downtime. An hour or more could of been required for a 4K remux. It is perfect for a late night.

Common scenarios are found in reference tables. These range from small 1080p encodes to huge 4K archives. The benchmarks lets you set your expectations. How does a 2-hour movie scale across the different qualities? Lossless remuxes increases file sizes exponentialy. That gives you some context so that big file size isn’t a surprise. There’s no free lunch, and quality comes at a price. It is a price of storage and transfer time.

Storage is about balancing what’s right for you. Want the highest quality? What fits in your library? How long are you willing to wait? Eliminate the guesswork. Let the numbers do the talking. Don’t waste time wondering if it’ll all fit. Don’t worry about if you should keep that one. Enjoy the film instead. Make clear plans and end up with a clean collection. Avoid a storage meltdown based off a simple calculation.

Blu-ray Rip Size Calculator

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