Dollar index down 0.1% at 100.72
The dollar was broadly steady as uncertainty about the US-Iran conflict kept traders cautious.
The conflict has disrupted energy supplies and stoked fears of global inflation.
Brent crude futures were last little changed at $88.16 a barrel, having risen above the $90 mark earlier in the day. The euro was little changed at $1.1441, while the British pound was 0.13% higher at $1.3470