A new poll released days before the vote said Emmanuel Macron and Ms Le Pen would make it through to the final runoff with 24 and 23 per cent of the vote.
Francois Fillon and Jean-Luc Mélenchon would come in joint third position with 19 per cent of first-round votes each, but would both be knocked out of the presidential race, as would Benoît Hamon, who would garner 8.5 per cent of the vote.
But even though Mr Macron is expected to win the May 7 runoff with 65 per cent of the vote to Ms Le Pen’s 35 per cent, the poll showed that the 39-year-old centrist’s voter base remains – unlike his rival’s – extremely fickle.
Le Pen voters remain the most certain, with 85 per cent sure of their choice, closely followed by Fillon voters, with 81 per cent sure of their choice.
A new poll showed that Marine Le Pen could make it into the second round of the French election
Things you didn't know about Marine Le Pen
Wed, April 5, 2017
Marine Le Pen is a French politician who is the president of the National Front, a national-conservative political party in France and one of its main political forces.
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Described as more democratic and republican than her nationalist father, she has led a movement of "de-demonization of the Front National" to detoxify it and soften its image
However, only 74 per cent of centrist voters said that they were sure that they would be voting for Mr Macron on April 23.
The figures on how voter turnout could swing the French election was revealed in a BVA Salesforce for Orange and Presse régionales poll published on Wednesday.
That research also chimed with another poll by Ifop-Fiducial for Paris Match, Cnews and Sud Radio published on Wednesday, which also showed Mr Macron and Ms Le Pen making it to the final round runoff with 23.5 and 22.5 per cent of the vote each.
Hot on their heels but lagging behind are Mr Fillon and Mr Mélenchon: the right-winger would garner 19.5 per cent of the vote and the leftist 18.5 per cent. Mr Hamon, for his part, would garner 7.5 per cent of the vote.
Although the poll shows Mr Macron comfortably beating Ms Le Pen with 60.5 per cent of the vote to her 39.5 per cent, Mrs Le Pen’s core support base is standing firm, with 84 per cent sure of their choice.
It found that Emmanuel Macron and Ms Le Pen would make it through to the final runoff
Mr Fillon’s certainty score stands at 79 per cent, compared to 70 per cent of Macron voters and 71 per cent of Mélenchon voters.
Ms Le Pen may be slipping in polls, but the fact that she has the most dedicated support base of all candidates could see her victorious, the polls showed.
A recent Ipsos Sopra-Steria poll for Cevipof and Le Monde also showed Mr Macron, a former banker, scoring 23 per cent of first-round votes, whilst the leader of the nationalist Front National party would score 22.5 per cent.
The two frontrunners are closely followed by centre-right candidate Mr Fillon, who is expected to garner 19.5 per cent of the vote, and hard-left firebrand Mr Mélenchon, who is expected to garner 19 per cent of the vote.
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Francois Fillon and Jean-Luc Mélenchon would come in joint third position with 19 per cent votes eac
The poll showed that Ms Le Pen's voter base remains and could hand her a shock overall victory
Mr Hamon, the Socialist party’s official candidate, is no longer considered a serious contender and is expected to garner eight per cent of the vote in the election’s first round, which is to be held on Sunday April 23.
Mr Macron is expected to beat Mrs Le Pen with 61 per cent to her 39 per cent in the second round, according to the poll for Le Monde.
A total of 11,601 registered French voters were interviewed between April 16 and April 17 for that Ipsos Sopra-Steria poll.
While the BVA Salesforce poll is based on responses from a total of 1,427 registered French voters interviewed between April 18 and April 19.
The Ifop-Fiducial poll used responses from a total of 2,792 registered French voters who were interviewed between April 16 and April 19.