At just 17, the Kiwi star smashed the record for the highest ever women's ODI score against Ireland.
En route her record-shattering innings, Kerr stitched a 295-run partnership for the second wicket with fellow spinner Leigh Kasperek (113) which is now the second highest partnership in women's ODIs, only behind Deepti Sharma and Punam Raut's 320 against Ireland in May 2017. The 17-year-old scored unbeaten 232 to break Belinda Clark's 21-year-old record of 229. She has also taken 31 ODI wickets.
After winning the toss New Zealand women opted to bat first.
New Zealand's Amelia Kerr created history on Wednesday when broke a record that was set even before she was born, scoring a double hundred against Ireland at Dublin. The partnership lasted from the 15th to the 48th over.
Kerr, whose previous career-best was 81 not out against the same opposition in the series opener, registered her maiden century only off 77 balls. Amy Satterthwaite (61 off 45 balls) and Kerr provided the team with a ideal start, scoring 113 for the first wicket.
Ireland stood little chance in the chase, losing wickets at regular intervals and succumbing after 44 overs.
In the second ODI, they had posted 418.
New Zealand now move across the Irish Sea to face England and South Africa in a T20 tri-series, from June 20-July 1, before a three-ODI series against England from July 9-15.