Where is the best place to exchange your money? Will taxi drivers accept American dollars.
Singapore has its own currency, Singapore Dollars (SGD$) so nowhere accepts US$.
You can exchange at a currency booth on arrival at Changi Airport. Very good rates. Or withdraw local SGD$ at an ATM at the airport.
Where are you staying, which hotel? If you let us know we can suggest currency exchange places in town that may be in that area.
No, taxi drivers accept SGD. You can change money at the exchangers at the airport. They operate 24/7 and their rate is comparable with those in the city. Alternatively, you can withdraw some money from the ATMs at the airport. Be aware of the bank charges though.
Change at the airport when you arrive, the rates are decent and not much different from changing in the city. The local currency is Singapore dollars (SGD). American dollars are not accepted anywhere except at some shops in the airport and hotels with a poor exchange rate.
Taxi drivers will not accept USD. There are money changers at the airport. In the city center, you can make a stop at Lucky Plaza in Orchard Road. Plenty of money changers where you can shop around for the best rate.
Enjoy your stay in Singapore.
Marriott Tang Plaza
From the Marriott you can walk to the money changers in Lucky plaza mall.
Best place to change money in Singapore is Mustaffa Centre 24hrs or Change Alley at Raffles Place train station but during business hours as it's located in the financial centre
Unless you are changing a very big sum, the rates at most money changers are within a few cents of each other so you won't be gaining much by hunting down the best rates.