In Nepal the currency is the Nepalese Rupee (NPR).

Denominations are: 1000, 500, 100, 50, 25, 20, 20, 5, 2 (coin & note), 1 (coin & note).

It is best to bring a mixture of cash and travelers checks in major currencies - USD, CAD, EUR, AUD - and ensure you have a mixture of large and small denominations. Money may easily be exchanged at Kathmandu airport on arrival and banks and licensed moneychangers in cities. Credit card cash advances and ATM withdrawals are in NPR only.
Everyone’s spending is different, but as a guide we suggest USD5-7 per meal in Kathmandu (breakfast is included at your hotel) and USD2-7 per day whilst trekking for soft drinks, snacks etc (if you drink or smoke this could be higher). Shopping is difficult to predict, but most people buy more than they intended. If you intend to buy quality art works including hand-painted thangkas, carpets or traditional jewelry allow significantly more – you can easily spend USD200+ for top quality items.