U.S. State Department spokeswoman Heather Nauert told reporters the administration had told Congress of the seven proposed sales on Thursday.
"It's now valued about $1.42 billion," she said.
The State Department said the package included technical support for early warning radar, high speed anti-radiation missiles, torpedoes and missile components.
Nauert said the sales showed U.S. "support for Taiwan's ability to maintain a sufficient self-defense capability," but there was no change to the United States' long-standing "one China" policy, which recognizes Beijing and not Taipei.
The United States is the sole arms supplier to Taiwan, which China deems its own and has never renounced the use of force to bring the self-ruled island under its control.
Beijing has given Taiwan President Tsai Ing-wen the cold shoulder since she took power last year because she leads an independence-leaning ruling party and refuses to recognize the "one China" policy.