These will include air and anti-tank robots.
The move has been approved by the United States.
"Estonia, Latvia and Lithuania stand united in our commitment to Ukraine's sovereignty and territorial integrity in the face of continued Russian aggression.
The Baltic states will continue to support Ukraine not only diplomatically and politically, but also by strengthening Ukraine's ability to defend itself, "the Baltic defense ministers wrote in a joint statement.
The ministers also write that they hope that the weapons will not have to be used and at the same time call on Russia to stop its "aggressive and irresponsible" behavior.
The Baltic countries are not the only ones planning to send material military aid to Ukraine.
Next week, the Czech Minister of Defense plans to propose that the country send artillery ammunition to the country, something that Ukraine wanted.
The President thanks Biden
On Friday, Ukrainian President Volodymyr Zelensky thanked US President Joe Biden for US diplomatic and military support, which he said was "unparalleled".
Earlier in the day, while the United States and Russia were in talks in Geneva, Ukraine accused Russia of actively recruiting mercenaries and sending weapons to the east with the aim of strengthening pro-Russian separatists in eastern Ukraine.
According to Kiev, it will be about fuel, tanks and artillery.
According to the country's security service, Russia is also behind hundreds of false bomb threats against Ukrainian society with the aim of creating concern.
Russia has not yet responded to the allegations.
Russian Communists: Recognize the separatists
On Friday, Vyacheslav Volodin, chairman of the Russian lower house Duman, announced that he would hold a meeting with party leaders next week regarding the separatist-controlled areas of Donetsk and Luhansk, Russia's state-controlled news agency Tass wrote.
The announcement comes after the Russian Communist Party, the country's second largest party, tabled a motion that Russia should formally recognize the territories of the pro-Russian separatists as independent states, separate from Ukraine.
"The right thing to do is to discuss the initiative with the group leaders and then, based on the results, take a stand on the issue in the Duma."
in Volodin.
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That is why the conflict in Ukraine has flared up again - here is a summary of 60 seconds.