Nobel laureate Malala Yousafzai will seek to inspire world leaders at a conference in London on Thursday to commit $1.4 billion this year to give Syrian refugee children access to education, she told Reuters on Sunday.

Heads of state and government and ministers from countries around the world will converge on London for the "Supporting Syria and the region" conference, which aims to raise funds for humanitarian crises caused by the Syrian war.

Some 700,000 Syrian children living in refugee camps in Jordan and Lebanon and in other Middle Eastern countries are out of school, according to a report issued by the Malala Fund, which campaigns and fundraises for educational causes.

"I have met so many Syrian refugee children, they are still in my mind. I can't forget them. The thought that they won't be able to go to school in their whole life is completely shocking and I cannot accept it," Malala said in a telephone interview.

"We can still help them, we can still protect them. They are not lost yet. They need schools. They need books. They need teachers. This is the way we can protect the future of Syria."

She will appear at the London conference alongside 17-year-old schoolgirl Muzoon Almellehan, who will be the only young Syrian refugee to address world leaders at the event.

"Without education we cannot do anything," Muzoon said on the same call as Malala.

Co-hosted by the United Nations and the governments of Britain, Germany, Norway and Kuwait, the London conference is not limited to education but aims to obtain pledges from countries to meet a range of Syrian humanitarian needs.

U.N. agencies are appealing for a total of $7.73 billion to cope with Syria's needs this year and an additional $1.2 billion are required by regional governments for their own plans to deal with the impact of Syria's conflict.

In previous years, donor funding has fallen short of U.N. appeals.