Identify the base currency and the target currency
Find the current exchange rate between the two currencies
Convert from base currency to target currency by multiplying by the exchange rate
Convert from target currency to base currency by dividing by the exchange rate
Check whether the exchange rate is quoted as direct or indirect
Use the correct bid or ask rate if buying or selling currency
Include any fees or commissions in the final calculation
Round the result according to the required currency precision
Verify the rate using a reliable financial source or currency converter