The currency in Sri Lanka is the Rupee, LKR, and a Rupee is worth approximately 7 Öre (SEK 0.07). You can only carry local currency amounting to SEK 350 in and out of the country.
FOREX Bank may have LKR in stock, but recommends that travellers take Euros or US Dollars in large denominations and change them at banks there. There are ATM’s in larger towns. Cards are seldom accepted as payment in restaurants and other places. Cash rules!