Mbps to kB/s ?

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Member Since: Nov 28, 2004

Does any body know how to figure out the conversion?

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Since: Nov 28, 2004

Dec 20, 2004 09:31 pm

ie 10.0 Mbps to ???? kBs

Chief Cook and Bottle Washer
Since: May 10, 2002

Dec 20, 2004 11:24 pm

Well the math isn't too bad. K=kilo or 1000 M=Mega or 1,000,000. So 1 mega anything = 1000 Kilo anything. Now per your subscript of small bps and large B you are getting into word length conversion. Bytes vs bits. A bit is a pulse. A byte is a "word". A word may be 7,8,....32 bits. That's where it gets hokey.

Since: Jan 08, 2003

Dec 21, 2004 09:37 am

One note:

b = bit = 0 or 1
B = byte

4 bits = nibble
2 nibbles = byte
2 bytes = commonly refered to as a word in current computer speak

so 8 bits = byte

1 kilobyte (kB) = 1024 bytes (B)
1 kilobit (kb) = 1024 bits (b)
1 megabyte (MB) = 1024 kilobytes (kB)
1 megabit (Mb) = 1024 kilobits (kb)

Gotta be careful, because there is only two possible numbers a bit could be, the math is all skewed, and thus the multipliers must be a root of two...

So, n Mbps = ( n / 8 ) * 1024 kBps

In your i.e. 10Mbps = 1280kBps

Now, does everyone do this properly? No, most don't. It's a common problem as the multipliers are so close to metric in name!


Chief Cook and Bottle Washer
Since: May 10, 2002

Dec 21, 2004 09:53 am

Yo Waldonian!

Good to see you posting. That is the stuff that is just hard to find written anywhere. I will keep this one for future reference. I just love how the marketing geeks swap back and forth between units to make their bigger, better, more wigit #5 sound.... well... bigger, better, more!

One question: I don't get the 1024 Mb = 1024 Kb part. My head is saying 1Mb = 1024 Kb. Am I missing something?

Since: Jan 08, 2003

Dec 21, 2004 09:54 am

Oops, lol

Good catch, typing slower than my thinking does that... I'll correct it.


Since: Apr 03, 2002

Dec 21, 2004 09:55 am

Canadian Math.

Since: Nov 28, 2004

Dec 21, 2004 07:19 pm

ok I think I got it I did that math and got the same equation as you did
Thanks alot guys!

Since: Jul 24, 2009

Jul 24, 2009 08:56 am

Just to clarify

1 kilobits per second (kbps) = 1000 bits per second (bps)
1 kilobytes per second (KBps) = 1024 bytes per second (Bps)
1 megabits per second (mbps) = 1000 kilobits per second (kbps)
1 megabytes per second (MBps) = 1024 kilobytes (KBps)


10 mbps = 1250 KBps
10 mbps = 1.25 MBps

This is because you are dividing by 8 (which puts the bits into bytes) and therefore you multiply by 1000 (the Kilo or 1000 bytes) not 1024. This is where there is further confusion (like in Waldo's case(sry dude)) because in speed conversions the multiplier is 1000 and in memory conversions the multiplier is 1024.

Bits are used in telecomunnications industry and Bytes are used in the computing industry. Typically, rather than make things unified and simple the telecomunnications industry use "smoke & mirrors" to baffle people into thinking their connection speeds are better than they really are...

You might wanna try this website it makes life a little easier and it does a little explanaition after also...


btw... i got this wrong about 3 times myself before swatting up on it properly...

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