Kohli got to the landmark in the 37th over when he guided one off Grandhomme towards the third man for a four.
Mahendra Singh Dhoni had reached the milestone last year while other Indians who have done so are Sachin Tendulkar, Rahul Dravid, Sourav Ganguly and Mohammad Azharuddin.
Another milestone was reaching his 49th international century surpassing Rahul Dravid (48 tons). He is second among Indian batsmen in terms of international hundreds after Sachin Tendulkar (100 tons).
Earlier in the series, the Indian captain had surpassed Australian great Ricky Ponting in the list of most ODI hundreds with his 31st ton.
Tendulkar tops the list with 49 hundreds and he is also the leading run-getter in the format.
Kohli had a quiet series against the Australians by his standards but he is back to his best against the Black Caps.
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