How much data can be stored on a DVD-R Disc?

[Blur]

I just bought some Ritek dvd-r media, it lists the capacity as 4.7GB but when i go to burn data i can't burn nearly that much onto the discs. So far i can burn about 4.25GB, maybe a few MB more. Is this normal? With cd-rs I know that you couldn't burn exactly 700mbs on the cd-r but you could get close. (about 695-698Mbs)

 

[Jeff7]

It's the old megabyte size thing - 1,000,000 bytes (storage device/media makers use this), vs 1,048,576 bytes (Windows uses this).
The DVD-R holds 4,700,000,000 bytes. Windows' report of about 4.25GB is closethen - 1,073,741,824bytes per Windows Gigabyte, * 4.25 = 4,563,402,752 bytes. 4.3772GB should be the max capacity, according to Windows.
I've heard the term gigibyte used already too - I don't know which is which though. Or if gigibyte is even an accepted word.

 

[Anubis]

about 4.3 GB

that what mine do.

 

[Atlantean]

Its actually 4.36 gbs. It says 4.7 gbs but that is because it is using the old style of mbs and gbs and kbs... as stated by Jeff7.

 

[Blur]

Thanks guys, just wanted to be sure.