The Wellington-born player hit 31 fours and two sixes in her 145-ball innings to top the 229 not out Australia's Belinda Clark amassed against Denmark in Mumbai in 1997 - nearly three years before Kerr was born.
Kerr was not done; she gave the greatest individual performance in the ODI history by taking 5 wickets in her spell at the cost of just 17 runs. Fellow Kiwi Martin Guptill scored 237 in 2015 against the West Indies and the highest score is held by India's Rohit Sharma after his 264 against Sri Lanka in 2014.
Wellington-born Amelia made her debut in 2016 against Pakistan and has represented New Zealand in 19 ODIs and nine T20Is so far.
Amelia remained unbeaten till the end of the innings with her score of 232 off just 145 balls, including 31 fours and 2 sixes. She was on 217 when the final over of New Zealand's innings began.
The 17-year-old Wellingtonian blasted a world high 232 against the hapless Irish in Dublin, then took five for 17 with her leg spin after having a two minute kip on the physio's table. "I was a bit sore".
Kerr became the youngest cricketer to score a double century in ODI cricket.
"I was thinking, 'Will she get the record?'" Tiffen said of the moment. Leigh Kasperek also scored a brilliant century, as New Zealand finished with 440/3 on their allotted 50 overs. [I] hit a six and everyone was clapping and I had no clue what they were clapping about.
Kerr had no idea she had even done it. "I didn't think I was going to bowl". While Kerr remained unbeaten the crease, thanks to her incredible knock, the White Ferns posted a mammoth 440-run total against their opponents.
She says at the time, the White Ferns had so little money put in that their coach was only part time comparing it to the money being sunk into the men's game.