Wolfram Alpha can do this: (density of gold) * (average volume of human) -> 1282 kg And if you do: (density of gold) * (average volume of human) * (pr

Wolfram Alpha can do this: (density of gold) * (average volume of human) -> 1282 kg And if you do: (density of gold) * (average volume of human) * (price of gold) It will even show you a plot of the time series of its value since the early 20th century.