He said: "My ambition is going to go to zero as soon as I have kids. I am going to be like, 'I do not really care anymore as I have another life to take care of'.
"It is totally understandable because you have children and your ambition shifts to be like, 'I want to be a good father'."
It's not the first time the acoustic artist has confessed to feeling broody - previously telling Zane Lowe on Apple Music's Beats 1 in January 2016 that he wanted to be a dad "like, last year".
He continued: "I'm ready, let's go - tour bus babies, little fat, chubby babies that just walk around."
His looming 30th birthday could signal to fans that they only have another four years of hits from the Grammy winner, as he mulled over the idea to OK! Magazine in March.
He told the publication: "I think the wheels should be in motion by the time I'm 30. But it's not really up to me.
"It's a two-way street. It has to be up to the partner as well."
Things appear to be moving very quickly for the Thinking Out Loud hit-maker, who also announced his engagement to former school friend Seaborn on Saturday in a heartwarming Instagram post of the cosy couple in a sweet candid Polaroid.
Sheeran informed his 18.9 million followers: "Got myself a fiancé just before new year. We are very happy and in love, and our cats are chuffed as well xx"
The singer met Seaborn, 24, when they were both students at Thomas Mills High School in Framlingham, Suffolk, when Ed had a crush on the pretty brunette.
But the pair were separated when Seaborn left high school to attend Duke University in Durham, North Carolina.
Sheeran did not begin dating the consultant - a keen hockey player who competed in British University Championships - until 2015, when she was working on Wall St, the financial district of New York.
To combat the long-distance, the pair spent most of 2016 travelling the world together as Sheeran took a year off from the music business.
In December that year, Seaborn transferred to the London office so that she could move in with Sheeran and the pair have been blissfully happy since.