The United States and Britain plan to announce billions of dollars worth of economic deals this week as part of US President Donald Trump's state visit, senior US officials said.

The deals are thought to be worth in excess of $10 billion ($A15 billion).

The two governments are expected to seal a trade agreement with three pillars: a new science and technology partnership to strengthen the tech sectors of both countries, cooperation in civil nuclear power, and advances in defence technology cooperation, the officials said in a telephone briefing.

Several US tech business leaders are expected to be in attendance for the state visit, the officials said.

Trump and first lady Melania Trump are to arrive late on Tuesday for talks with King Charles and Queen Camilla on Wednesday at Windsor Ca

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