The IMF has a relatively smooth forecast for nominal GDP growth out to 2022 for all countries.
The forecast China to close the gap from $7 trillion less than the USA in nominal GDP in 2020 to $6 trillion less than the USA in nominal GDP in 2022. They have a slightly accelerating trend to the gains in GDP for China.
Extrapolating the IMF forecast would indicate that China would pass the USA in nominal GDP in 2030 to 2032.
In 2015, IHS forecast that China would pass the USA nominal GDP in 2024.
Brian Wang is a Futurist Thought Leader and a popular Science blogger with 1 million readers per month. His blog Nextbigfuture.com is ranked #1 Science News Blog. It covers many disruptive technology and trends including Space, Robotics, Artificial Intelligence, Medicine, Anti-aging Biotechnology, and Nanotechnology.
Known for identifying cutting edge technologies, he is currently a Co-Founder of a startup and fundraiser for high potential early-stage companies. He is the Head of Research for Allocations for deep technology investments and an Angel Investor at Space Angels.
A frequent speaker at corporations, he has been a TEDx speaker, a Singularity University speaker and guest at numerous interviews for radio and podcasts. He is open to public speaking and advising engagements.