# Converting Hex to Decimal

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Can anyone reccomend a site that explains how to do this?

Cheers

Re: Converting Hex to Decimal

www.ciscoforum.net

Re: Converting Hex to Decimal

Thanks

found nothing of any use.

This one seems good though.

http://www.webelfin.com/webelfindesign/hexdec.html

Re: Converting Hex to Decimal

Still makes no sense to me.

I can do it by converting into bianry & then to decimal, but surely there's
a quicker way?

Re: Converting Hex to Decimal

That is really the easiest way and in my view the quickest - octal direct to
decimal used to be ok because multiples of 8 are easier to handle, but
working through multiples of 16!

And given Hex was effectively invented to be a shorthand way to accurately
represent 8 bit binary values without the transposition errors that could
occur when writing out strings of 1s and 0s converting from hex to binary
and then binary to decimal really makes the most sense.

But direct hex to decimal conversion is a deprecated excercise anyway, in
the CCNA exam for example you won't find a question that requires you to do
that - what you really need to know is decimal <-> binary and binary <->

Aubrey

Re: Converting Hex to Decimal

Looking at this from the IP-address point of view (ranging from 0 to 255, or
00000000 to 11111111, or 0 to FF)....

The hex comes in "pairs" (like 9A), so counting the decimal (10-based) from
the hex (16-based) can be done as follows:

(16*9)+(1*A)=154

For refreshing of memory, the hex counts as 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A
(=10), B (=11), C (=12), D (=13), E (=14), F (=15)

To do it again for FF (255) --> (16*15)+(1*15) --> 255

Julle

Re: Converting Hex to Decimal

Thanks Julle