The data is due on Wednesday and the anticipation is likely to keep things calm until then.

The Australian and New Zealand dollars rose overnight and were steady in the pre-CPI calm in Asia. The Aussie held gains at $0.6977. The kiwi did likewise at $0.6276, leaving both just above their 50-day moving averages.

Sterling held at $1.2081 and the euro was stuck just above parity at $1.0189, with the continent's energy crisis meaning it may miss out on a boost if the dollar weakened. The yen rose slightly to 134.75 per dollar. On Tuesday, a New York Fed survey showed consumers' inflation expectations fell sharply in July, perhaps easing some of the upward pressure on rates from last week's strong jobs figures.

"Expectations that the Fed may announce another 75 basis point rate hike on September 21 have risen on the back of (Friday's) strong U.S. July payrolls report," said Jane Foley, senior currency strategist at Rabobank.

"Later this week, the July U.S. CPI inflation release is expected to show some moderation in inflation pressures," she said. "This may now be sufficient for the Fed to relax."

Economists polled by Reuters see year-on-year headline inflation at 8.7% -- incredibly high, but below last month's 9.1% figure.

Money-market futures show traders see about a two-thirds chance of a 75 bp hike next month and have started pushing expectations for rate cuts back, deeper into 2023.

Two-year Treasury yields, which track short-term U.S. rate expectations, held at 3.2157% on Tuesday, with benchmark 10-year yields 45 bps below that at 2.7572%.

An upside CPI surprise could drive yields and the dollar higher.

"Investors have become increasingly sure in their view that inflation will drop back fairly quickly, and that it will subsequently remain around the Fed's target," said Thomas Mathews of Capital Economics.

"The market is arguably quite vulnerable to a surprise on inflation, should any evidence gather it is staying high longer than expected. That would also probably prompt a sharper response from the Fed, and see the bond market selloff resume in earnest."

(Reporting by Tom Westbrook. Editing by Sam Holmes)

By Tom Westbrook