However, officials acknowledge a feeling of fatigue from worldwide donors, especially after the wars in Iraq and Syria sparked the biggest mass migration since World War II.
Pledges were still expected to fall short of the level desired.
The U.S. and the United Kingdom - countries leading the 2003 invasion of Iraq - also said they would allocate funds for the reconstruction of Iraq.
According to UNICEF representative in Iraq Peter Hawkins, the conference on the reconstruction of this country, organized by Kuwait and scheduled for February 12th to 14th, represents a unique opportunity to draw attention to the alarming situation of children, among other issues.
Iraq has received investment and donation pledges from allies worth $30 billion, Kuwaiti Foreign Minister Sheikh Sabah al Khalid Al Sabah told a news conference on Wednesday.
"Iraq is required today to start a comprehensive reconstruction of the infrastructure and facilities that were destroyed".
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"The worldwide community still faces a direct threat by armed groups, which requires opening up new prospects in the global coalition", he told participants in the one-day meeting.
Newsmen report that the director-general of Iraq's planning ministry, Qusay Adulfattah, on Monday said rebuilding Iraq after three years of war with Islamic State will cost more than 88 billion dollars.
Turkey announced $5 billion in loan funds and credit easing, while the Islamic Development Bank announced a contribution of $500 million.
Tillerson also vowed to allocate $200 million to support coalition's efforts against Daesh in Syria.
Mr Al Abadi said that the Iraqi "vision" would rely on the principle of cooperation for Iraq to become a "gateway for joint interests".