How to find US total debt? Sorry i'm not really an economist but I don't know where else to ask.
I'm reading Ray Dalio's Big Debt Crises and he has several graphs for total US debt burdens
https://imgur.com/a/tPX3LuH
where it's about 350% of GDP in 2008, but when i can't seem to find source for total debt, only federal debt which seems to only be around 68% at the time
i'd like to find other countries total debt to GDP ratios too if possible. how do i go about this?
Thanks!
The figure provided by that author is widely inaccurate according to the official statistics.
According to the OECD the general government debt to GDP ratio ratio in 2008 was just $102\%$. Moreover, here is comparison to other countries:

Moreover, general government is by OECD defined thusly:

General government consists of central, state and local governments and the social security funds controlled by these units. General government accounts presents data on fiscal balance, debt, revenues, expenditure, costs and reserves of governments. Central government consists of the institutional units making up the central government plus those non-profit institutions that are controlled and mainly financed by central government. The political authority of central government extends over the entire economy. Central government can impose taxes on all residents and non-resident units engaged in economic activities within the country.

So it does include central, state and local government and even non-profits that are mainly financed by public funds.
Hence either there are some caveats that you are not mentioning in your question (perhaps it does not include just government debt but also some private debts or present value of unfunded future liabilities) or the author of the book made a mistake.