The local currency of Nepal is Rupee. Nepali Rupee notes come in NRs. 1, NRs. 2, NRs. 5, NRs. 10, NRs. 20, NRs. 50, NRs. 100, NRs. 500 and NRs. 1,000.
Modern banking services are readily available in Kathmandu. Hence, visitors will not have any problem using their Visa, Master card, or American Express. Also, currency exchange services are available in major tourist areas like Thamel in Kathmandu. It is perfectly safe to exchange your currencies through a bank or an authorized agent.
You can check the daily foreign exchange rates by visiting the link provided: https://www.nrb.org.np/fxmexchangerate.php.