Rocky road ahead for Egypt president-elect

Abdel Fattah al-Sisi, who has romped home in Egypt's presidential election after crushing Islamists, faces a tough task to restore stability and revive a battered economy amid fears of a return to autocracy.

On Tuesday, the electoral commission declared Sisi won 96.91 per cent of the vote on turnout of 47.5 per cent, nearly a year after he toppled the country's first freely elected leader, Islamist Mohamed Morsi.

The crushing victory over leftist leader Hamdeen Sabbahi had never been in doubt, with many lauding the retired field marshal as a hero for ending Morsi's year of divisive rule 11 months ago.

But global rights watchdogs, international leaders and experts have warned that real challenges now face Sisi as he inherits a deeply polarised country.

The United States said it looks forward to working with Sisi but expressed concerns about the "restrictive political environment" in which last week's vote took place.

The May 26-28 election was boycotted by Morsi's Muslim Brotherhood and youth groups of the 2011 popular uprising, after both were targeted in a withering crackdown on dissent.

"We urge the president-elect and the government to adopt the reforms that are needed to govern with accountability and transparency, ensure justice for every individual, and demonstrate a commitment to the protection of the universal rights of all Egyptians," said the White House.

It was only in April that Washington partially lifted its annual aid to Egypt worth around $1.5 billion, which it had frozen after the military deposed Morsi.

Ahead of the presidential election, rights group Amnesty International had said the vote did not mean the slate would be wiped "clean... of gross human rights violations".

Since Morsi was ousted in July 2013, a government crackdown targeting the Brotherhood has killed more than 1400 people and jailed over 15,000.

The authorities have also sentenced hundreds of Morsi supporters to death after speedy trials which United Nations Secretary General Ban Ki-moon expressed "alarm" over.

Several of the revolutionary youth leaders who spearheaded the 2011 revolt against longtime autocrat Hosni Mubarak have also been jailed for breaking what the authorities say was a law banning all but police-sanctioned protests.

On Tuesday, Sisi attempted to ease concerns as he echoed the slogans of the 2011 uprising, urging Egyptians to work for "bread, freedom, human dignity, social justice".