The Aussie's jump encouraged some traders who have been searching for direction recently after a lull in currency markets but the euro and dollar moved little, suggesting broader volatility remained subdued.

The currency has been dogged by a dovish Reserve Bank of Australia but it rose above $0.72 for the first time since Feb. 21, after data showed China's economy grew 6.4 percent in the first quarter.

Australia's dollar is sensitive to the economic fortunes of China, its biggest trading partner.

"It is becoming very clear again this morning what really matters for the Australian dollar is China. The currency is up despite the fact that the RBA rate meeting caused negative sentiment yesterday," said Esther Maria Reichelt, an FX strategist at Commerzbank in Frankfurt.

On Tuesday, the Aussie took a brief hit after the RBA said it believes a cut in interest rates would be "appropriate" should inflation stay low and unemployment trend higher.

The US dollar, often a safe haven, sagged against the euro after the Chinese data eased concerns about a global economic slowdown.

The dollar index against a basket of six major currencies dipped 0.2 percent to 96.906.