"At 17:00 [15:00 GMT] I will hold coordination talk with German Chancellor Angela Merkel who together with [French President Francois] Hollande helped us in Minsk," Poroshenko said.
The Ukrainian president added that he would have a phone conversation with Barack Obama two hours later.
The talks are expected to be held in anticipation of the ceasefire between Kiev forces and independence supporters in eastern Ukraine that is due to come into force at midnight local time on February 15 (February 14, 22:00 GMT).
The leaders of Ukraine, France, Germany, and Russia held a 16-hour summit in Minsk on Wednesday and early Thursday. The talks resulted in a new political deal aimed at stopping the deadly conflict in eastern Ukraine.
The deal was signed by the Contact Group on Ukraine, including envoys from Moscow, Kiev, the self-proclaimed people's republics of Donetsk and Luhansk and the Organization for Security and Co-operation in Europe (OSCE).
Despite a similar ceasefire agreement signed by the parties in last September, clashes in eastern Ukraine intensified in the first weeks of 2015.
