Re: Formula for Currency Conversion

["Paul Morgan" <pmorgan@xxxxxxxxxxxxxx>]

Nilesh,

Create a file for the currency exchange rates.  The file would have two
fields of Currency (primary unique key which appears to be 3A in your case)
and the exchange rate. To convert from one currency to another you calculate
a currency exchange rate from the two currencies' Dollar exchange rates.

To calculate the two currencies exchange rate chain to the file for both
currencies to retrieve both exchange rates.  The exchange rate between the
two currencies is the To Currency Exchange Rate divided by the From Currency
Exchange Rate.  Use the calculated exchange rate between the two currencies
to do the conversion.

An example with just currency units

Yen exchange rate is (Yen / Dollar).  To convert Yen to Dollars you divide
the Yen by the exchange rate to get Dollars:

Yen / (Yen / Dollar) = Dollar

Won exchange rate is (Won / Dollar).  To convert Won to Dollars you divide
the Won by the exchange rate to get Dollars:

Won / (Won / Dollar ) = Dollar

To convert Yen to Won you calculate the Yen to Won exchange rate.  The Yen
to Won exchange rate is the Yen exchange rate divided by the Won exchange
rate:

(Yen / Dollar) / (Won / Dollar) = (Yen / Won)

To convert Yen to Won you divide the Yen by the exchange rate:

Yen /((Yen / Dollar) / (Won / Dollar)) = Yen / (Yen / Won) = Won.

Paul


-- 
Paul Morgan
Senior Programmer Analyst - Retail
J. Jill Group
100 Birch Pond Drive, PO Box 2009
Tilton, NH 03276-2009
Phone: (603) 266-2117
Fax:   (603) 266-2333
"Butala, Nilesh" <NButala@xxxxxxxxxxxxxxx> wrote in
message news:7B448EABE941D34D8648522FD07AA6391375CD@xxxxxxxxxxxxxxx
> Currently we are receiving Currency exchange rates from Bank  against USD
> (US$). We have Companies in UK and Mexico, Germany, Etc. I am trying to
> convert rates from Japan (JPY) to (EUR) Euro, EUR to GBP, JPY to GBP etc.
>
> If some one has written a code and like to share with me or point me to
> right direction.
>
> Thanks
>
> Nilesh
>
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