Australia will contribute A$70m ($50m; £38m) in military support to Ukraine.
Prime Minister Scott Morrison said on Tuesday the money will go towards lethal as well as non-lethal aid.
"We are talking missiles, ammunition, we are talking supporting them in their defence of their own homeland in Ukraine," he said.
He declined to elaborate on specifics, saying he did not want "to give Russia a heads up".
Morrison says his government will also commit A$35m in humanitarian aid to Ukraine.
