exchange rate
US /ɪksˈtʃeɪndʒ reɪt/
UK /ɪksˈtʃeɪndʒ reɪt/

1.
taxa de câmbio
the value of one currency for the purpose of conversion to another
:
•
The exchange rate between the dollar and the euro fluctuates daily.
A taxa de câmbio entre o dólar e o euro flutua diariamente.
•
Always check the current exchange rate before converting money.
Sempre verifique a taxa de câmbio atual antes de converter dinheiro.