..web service to convert INR to USD..

[rohitscripts]

I'm using paypal in my website and as it dont support transactions in INR, i need to convert the amount from INR to USD and pas the same to Paypal.
so..nw can any one help me in converting the INR to USD...!!!
I guess i sh'ld use some web service to do this.
any help regarding this 'ld be appreciated..
thanks in advance