When told she made it look easy, she replied: "I don't know about that. There was a lot of hurt just trying to keep the other girls off."
Carrington won the K1 200m final by almost 2s on Saturday night in an unsurprising result given it was her seventh straight world title over the distance. She claimed gold over 200m at the last two Olympics and is unbeaten in the event for seven years.
Her record in the K1 500m is nowhere near as dominant. She earned world championship silver in the event the past two years after earning gold in 2015 and bronze at the 2016 Rio Olympics.
Her convincing victories over both distances leave the 30-year-old well placed to become the first New Zealander to win gold at three consecutive Olympics at next year's Tokyo Games.
Carrington was back on the water 90 minutes later with Aimee Fisher, Caitlin Ryan and Kayla Imrie for the K4 500m final. The Kiwi quartet were second early on and third at the halfway mark before fading to fourth behind Hungary, Belarus and Poland, 2.44s behind the winners.
New Zealand were runners-up by just 0.01s in the K4 500m final last year and earned bronze in 2017.