This is at PPP(Puchasing Power Parity). It's nominal is expected to be around 1.5 times as large.
Ascertaining a GDP in PPP has too many flaws. Yes I am agreeing with the fact that China (Currency Manipulation) is a low cost economy, but at the same time when everything is compared in absolute terms like, number of ACs the US hv and China need to build same numbers then China also need to show the same smartness in achieving the GDP in absolute terms.. Meanwhile, Indian low cost mechanism is far better than China in terms of Quality.. So by 2030, it will surpass the US economy in terms of PPP if the YoY growth rate is 8.5% and at the same time Indian per capita income will remain less than qtr of US.. So this is BS.. China can become the driver of the economy in future only if it changes its expansion policy and stop bullying small countries like Vietnam, Philipines etc and grab their lands.
Again - in Nominal terms, China may cross US not before 2050.. So we sould start focusing on our own economy and hv a better life..
No Look at the following forecast:
Top 10 largest economies in 2020 - Analyst Insight from Euromonitor International
It shows China(although at PPP) is at 28 trillion compared to the US's 22 trillion. Remember as the living standards are still far behind in China in 2020, as opposed to US, China will keep continuing to grow much quicker than the US for decades to come. I think that estimates of US GDP are too optimistic as no-one has taken into account what will happen to the US when it's currency is no longer the world's reserve currency but we can leave that for now.
The reason why I think that China will overtake the US militarily is simply a matter of economics. Whoever has the richest economy, can afford to have the most advanced and largest military.