The   local unit of currency is the Kenya Shilling which these days is freely   convertible within Kenya for the U.S.$ and other currencies. There are   numerous banks and bureaux de change in towns, and most lodges and   hotels will exchange currency or travellers cheques at reasonable rates. 
                              It    is  not  possible  to  obtain  Kenya  Shillings  outside  the    country,  and  it  is  illegal  to  export  more  than  a  small    amount. Many items or services are priced and paid for in US dollars so   do not convert more funds into the local currency than you need for   incidental expenses. 
                            
Credit   cards are accepted at an increasing number of establishments in Kenya   but not everywhere. It is not generally possible to obtain cash on a   credit card in Kenya, so it is recommended that visitors carry   sufficient funds in the form of travellers cheques. 
                            
You   should take most of your money in travellers cheques from a well known   company such as American Express or Thomas Cook. US Dollars or Pounds   Sterling are recommended. It is advisable to carry some US dollars cash   in small denominations. Well known credit cards such as Visa, Mastercard   and American Express are accepted at                            many hotels and tourist shops.