1 USD ≈ 10.5–11.5 NOK (fluctuates). Thus, 1 NOK ≈ $0.09–$0.10. The Norwegian krone is not worth more than the US dollar—it takes ~10 kroner to buy one dollar.
While 1 NOK < 1 USD, PPP-adjusted (Big Mac Index, OECD), Norway's high wages make goods/services expensive in USD terms. A beer in Oslo costs ~$12; in NYC ~$8. But the currency unit remains weaker.
Use Vipps/MobilePay (ubiquitous), credit cards (no fee), or withdraw NOK from ATMs (avoid dynamic currency conversion). Don't exchange cash at airports—terrible rates.