That’s kinda what gdp used to be. But besides gdp there is basically no equivalent measure thats all encompassing like gdp because any measure that uses monetrary value is basically just gdp minus/plus a few things so if u want actual production capacity u basically just have to look at the actual raw numbers of what each country produces for example China makes 1000 million metric tons of steel a year while Japan makes 84 million (which is probably more representative of the actual sizes of their economies cuz China puts out very conservative gdp numbers while the global north like to go absolutely fucking wild and include everything they can possibly justify like illegal drugs or rent for example). But those kinds of numbers are very hard to find for most things.
That’s kinda what gdp used to be. But besides gdp there is basically no equivalent measure thats all encompassing like gdp because any measure that uses monetrary value is basically just gdp minus/plus a few things so if u want actual production capacity u basically just have to look at the actual raw numbers of what each country produces for example China makes 1000 million metric tons of steel a year while Japan makes 84 million (which is probably more representative of the actual sizes of their economies cuz China puts out very conservative gdp numbers while the global north like to go absolutely fucking wild and include everything they can possibly justify like illegal drugs or rent for example). But those kinds of numbers are very hard to find for most things.