Donald Trump could be forced to pony up hundreds of millions of dollars — dealing a “huge blow” to his wallet — even if he appeals his New York defamation verdict and a looming one in his civil fraud trial, experts said.

The former president stands to be on the hook for $370 million when a Manhattan judge issues a verdict this month in the fraud case brought by New York Attorney General Letitia James over the Trump Organization’s business dealings.

He was ordered by a Manhattan federal jury last month to pay sexual assault accuser E. Jean Carroll $83 million for defamation.

But even if Trump, 77, fights the verdicts and appeals, he would still have to front a potential $453 million total as an “undertaking,” or security, in the two cases, according to legal experts.