Open a currency conversion website such as CoinMill, Oanda or XE to convert your rupees to pounds mathematically.
Multiply one rupee by the number of pounds sterling equivalent to one rupee according to the day's exchange rate. With this method you will determine the value of pounds sterling against one rupee. Use a calculator to check your calculations if you are converting multiple rupees to pounds sterling.
Visit a money-exchange location such as a currency conversion stand in an international airport---in Britain, India or another location---or a bank in order to convert actual rupees to pounds sterling. Money-exchange businesses in cities in either country will also convert currency, as will Western Union locations. Use your calculator to make sure that you have received correct change.
