The deal is worth $US725 million ($A1.1 billion).
The assistance will include Stinger missiles, ammunition for High Mobility Artillery Rocket Systems (HIMARS), drones and land mines, among other items, Secretary of State Antony Blinken said on Monday.
Today, I am announcing the delivery of $725 million in additional weapons and equipment for Ukraine's defense. The United States and more than 50 nations stand united with Ukraine.— Secretary Antony Blinken (@SecBlinken) December 2, 2024
Reuters had reported last week that the Biden administration planned to provide the equipment, much of it anti-tank weapons to ward off Russia's attacking troops.
"The United States and more than 50 nations stand united to ensure Ukraine has the capabilities it needs to defend itself against Russian aggression," Blinken's statement said.
The announcement marks a steep uptick in size from Biden's recent use of so-called Presidential Drawdown Authority (PDA), which allows the US to draw from current weapons stocks to help allies in an emergency.
Recent PDA announcements have typically ranged from $US125 million ($A194 million) to $US250 million ($A388 million). Biden has an estimated $US4 billion ($A6.2 billion) to $US5 billion ($A7.8 billion) in PDA already authorised by Congress that he is expected to use for Ukraine before Republican President-elect Donald Trump takes office on January 20.
US Secretary of State Antony Blinken has announced a new weapons package for Ukraine. (AP PHOTO)
The tranche of weapons represents the first time in decades the US has exported land mines, the use of which is controversial because of the potential harm to civilians.
Although more than 160 countries have signed a treaty banning their use, Kyiv has been asking for them since Russia launched its full-scale invasion in early 2022, and Russian forces have used them on the front lines.
The land mines that would be sent to Ukraine are "non-persistent," with a power system that lasts for just a short time, leaving the devices non-lethal. This means that - unlike older landmines - they would not remain in the ground, threatening civilians indefinitely.
