Hewlett-Packard is planning to cut about 2,000 more jobs than it had previously announced, as chief executive Meg Whitman tries to turn the company around.

Last month, the company posted the largest loss in its 73-year history.

In a regulatory filing on Monday, the computer and printer maker says it will cut 29,000 jobs by October 2014, up from the 27,000 it announced in May.

It didn't explain why it had raised the number. As before, HP expects some job cuts to come through an early retirement program.

The company also says it expects to record charges of $US3.7 billion ($A3.6 billion), mainly for the job cuts. That's up from the May estimate of $US3.5 billion.