On average, you can sell American currency at the rate of UAH 39.60 per dollar.

Dollar exchange rate to the hryvnia in Kyiv bank exchangers today fell by 20 kopecks – to 40.30 hryvnias/dollar.
According to the UNIAN correspondent, the hryvnia exchange rate against the euro remained at the level of the previous day – 41.25 hryvnias/euro.
American currency can be sold at an average rate of UAH 39.60 per dollar, euros at UAH 40.50 per euro.
Course during the war:
On May 21, the National Bank canceled restrictions on setting the exchange rateat which authorized institutions can sell cash foreign currency to clients, previously the relevant exchange rate should not have deviated from the official rate by more than 10%.
Before the full-scale invasion of Russia into Ukraine, the hryvnia had a floating exchange rate. The regulator can return to a floating exchange rate, provided the state of the foreign exchange market is balanced.
July 21 NBU weakened the official exchange rate of the hryvnia by 25% – up to UAH 36.57/dollar.
In the draft State Budget for next year, the Cabinet of Ministers predicted an average hryvnia exchange rate of 42.2 UAH/dollar, and by the end of 2023, officials forecast it at the level of 45.8 UAH/dollar.