Despite languishing around 4 per cent-5 per cent in the polls – down from 12.6 per cent in the 2015 election – Mr Nuttall said he believed the Eurosceptic party could do well in "a number" of constituencies on Thursday, potentially doubling the single seat it held in the last Parliament.
But he denied that, if he was not among the party's representation in the Commons, he would have to hand over the leadership to someone who was.
Speaking on LBC radio, Mr Nuttall – who became leader in November after a chaotic sequence of events which saw his predecessor quit after just 18 days – played down the significance of poor polls, ascribing them in part to the party focusing its efforts in a few winnable seats rather than adopting 2015's "scattergun" approach of seeking votes all over the country.
Ukip leader Paul Nuttall won’t stand down even if he loses yet another election bid
There will be no pressure for me to stand down as leader of Ukip
"Vote share doesn't matter than much in first-past-the-post elections. You can come in with four million votes and only get one seat," said Mr Nuttall, who is standing in the Lincolnshire seat of Boston and Skegness.
"It's not beyond the realms of possibility that we might double the number of seats we've got. I think we will get over the line in a number of seats but our vote share will go down."
He added: "There will be no pressure for me to stand down as leader of Ukip. I've only been in the job for six months. Nigel Farage wasn't in Parliament and was still the leader of Ukip. When Ukip was at its most influential we didn't have an MP, when we forced David Cameron to have that referendum.
Ukip have been languishing around 4 per cent in the polls
"He was forced into that because Ukip was going up in the polls, Ukip was winning local elections, and they panicked, and we did that without having an MP."
Mr Nuttall said he had "absolutely no idea" why he had repeatedly called Plaid Cymru leader Leanne Wood "Natalie" during a live TV debate.
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"Even during prep that day, I kept calling her 'Natalie'," he said.
"Everyone was saying to me: 'Her name is Leanne' and I went onto the platform saying: 'Leanne, Leanne, Leanne', and it just came out wrong."