How much potential monthly data transfer with 4Mbps bandwidth?

[TechBoyJK]

I need help accurately figuring out how much "potential" data transfer is possible with a capped 4mpbs bandwidth feed.

Also, in reverse, how much bandwidth would I need to get 750GB of data transfer?

Let's assume the month long period is 30 days.

What I am thinking is 4Mbps x 60 (seconds) x 60 (minutes) x 24 (hours) x 30 (days) = 10,368,000 Mbits or 1,296,000 MB's or 1,296 GB.

Is this math right?

 

[Need4Speed]

seems right to me

 

[DnetMHZ]

your theoretical max would actually be 1265.625 GB (1024 MB per GB) although you would not actually be capable of
transmitting that amount of data, taking into account TCP/IP overhead.


DnetMHZ

 

[gaidin123]

303.4 K/s to do 750GB transfer in a 30 day month...not including overhead.

Gaidin

Edit: Me bad, 303.4 KB/s! 4Mbps=512KB/s

303.4/512=.59
750/1290=.58

 

[TechBoyJK]

I am confused that 300 K can do 750GB not including over head, but 4 Mbps is only 500GB more?

 

[TechBoyJK]

I wonder if the 300K figure is 300 kiloBytes, not bits, because if you multiply 300X8 you get about 2.4Mbps, which is about the same ratio to 4Mbps as 750GB is to 1290GB. ???

 

[Fallen Kell]

I would agree that the "K" there in 303.4 K/s is KiloByte not kilobit... The ratio of 2.4 Mbps to 4 Mbps = .581 and the ratio of 750GB to 1290GB is .6 factor in rounding errors in the above people's posts, the "K" is KiloBytes.

 

[MysticLlama]

The way my host has always figured it is that 303GB/mo. of transfer is = to 1mb

Of course some months are longer than others and whatnot.

If you need to transfer 750Gb, then that could be done on a 2.5mb pipe.

Your math is right for the full potential, and then just take that, divide by four to normalize to 1mb (about the 303 figure) then divide that into your 750 and you get the other number.

The thing to think about though is traffic pattens. If you need to transfer 750GB, but only during certain hours or something, you'll obviously need a lot more bandwidth. If this is a fixed pipe to an office or something (i.e. dual T1) you'll have to either keep it full most of the time, or get more bandwidth than you'd normally get.

Depending on the situation you could either get a certain amount of fixed transfer (i.e. the 2.5mb, or 3mb for two T1s), or if you're in a colo, just pay for a fixed amount of guaranteed bandwidth, then work out and overage per GB, then you can burst to 10mb if you need to, and can do the same amount of transfer in less time.

Hope I didn't go off too much there, let us know what you're trying to do and maybe it can be clarified more.