The dollar tumbled more than 1 percent against the euro and the yen on Friday as strikingly weak Chinese factory data fanned global growth worries and cooled betting that the Federal Reserve will raise U.S. interest rates next month.

Chinese manufacturing activity shrank at its fastest pace in 6-1/2 years in August, compounding investor concerns over slowing growth in the world's No. 2 economy and ignited sell-offs in equities and commodities.