What is the typical capacity of a DVD?
Even now in 2025, DVDs remain an essential medium for movie collections and data backups. However, many people have questions like, "Is 4.7GB really 4.7GB?" and "Why do the same DVDs have different capacities?" In this article, we'll thoroughly explain DVD capacity specifications, how to choose the right one, and compatibility with Aestiquo products!
Why are DVD capacities different? Types and features
The capacity of a DVD is determined by the combination of single-sided/double-sided and single-layer/multi-layer . The most common is the DVD-5 (single-sided/single-layer) at 4.7GB, but did you know that it can actually go up to 17GB?
List of major DVD types and capacities
| kinds | structure | capacity | Video recording time (standard quality) | Main uses |
|---|---|---|---|---|
| DVD-5 | Single-sided single layer | 4.7GB | Approximately 120 minutes | General movies, data backup |
| DVD-9 | Single-sided multi-layer | 8.5GB | Approximately 240 minutes | Feature films, films with bonus features |
| DVD-10 | Double-sided single layer | 9.4GB | Approximately 270 minutes | TV drama complete set |
| DVD-18 | Double-sided multi-layer | 17GB | Approximately 480 minutes | Ultra-long works, large-volume data storage |
Technology that affects capacity: Why does the capacity increase with more layers?
The capacity of a DVD is determined by the number of recording layers and the recording density . The secret to achieving a capacity six times that of a CD is the shortening of the laser wavelength and the narrowing of the track pitch .
Technical points
-
Single layer vs. multi-layer
Single layer discs have one recording layer, while dual layer discs have two layers stacked on top of each other. Multi-layer discs are more expensive to manufacture because they require switching the focus of the laser to read. -
Single-sided vs. double-sided
Double-sided discs have a recording layer on both sides, which doubles the capacity, but the disadvantage is that you have to flip the disc over while watching. -
Differences in recording density
The pit size (information projections) of a DVD is 0.4 μm, and the track pitch is 0.74 μm, which is about half the size of a CD. This allows about six times as much data to be packed into the same area ( Source: DVD Forum ).
Hands-on! How to Choose the Best DVD for Your Needs
Recommended for movie collectors
- Standard movies (about 2 hours) : DVD-5 is sufficient. Popular movies are often available in budget versions, so they are economical.
- Feature films with extras : DVD-9 required. For example, the Director's Cut of "Avatar" is over 8GB and requires multiple layers.
- Series titles : DVD-10 and DVD-18. The Lord of the Rings trilogy can be stored compactly on double-sided discs.
When used for data backup
- Home photos/videos : DVD-5 is sufficient. For annual backups , DVD-R is recommended due to its durability.
- Large data volumes (over 10GB) : Use a DVD-18 or multiple DVD-9 discs. However, for frequently accessed data, an external hard drive is more convenient.
Tips for comfortable viewing on Aestiquo DVD player
Aestiquo products (e.g., PD141/D156 series) are compatible with all DVD formats , but you should be especially careful when playing multi-layer discs. Older players may freeze for a moment when switching layers. If this happens, please check the official FAQ.
Frequently Asked Questions: Questions about DVD capacity
Summary: Correct understanding of DVD capacity is the key to choosing
DVD capacities vary from 4.7GB to 17GB, depending on the combination of "single-sided" or "double-sided" and "single-layer" or "multi-layer." DVD-5 or DVD-9 discs are convenient for watching movies, while rewritable DVD-RW discs are convenient for storing data. Aestiquo 's DVD player supports all formats, so you can enjoy your favorite discs.
One last question! We'll answer the question, "Why is the DVD capacity 4.7GB?" At the time of development, Hollywood film companies requested a capacity that would allow them to record 133 minutes (approximately 2 hours and 13 minutes) of high-quality footage, and this number was decided upon ( Reference: Wikipedia ). The current DVD capacity is a compromise between technology and entertainment value.
DVDs will continue to play a vital role in digital archives. Make sure you have the right knowledge and enjoy using them in the best possible way!
See the official Aestiquo FAQ
