How Much Food Is There On Earth?

How Much Food Is There On Earth?

Go to to build your math & science skills!
Food already in cupboards, supermarkets, & warehouses could feed humanity for 4 months, but potential food – berries, termites & krill – could extend that by another year.

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To learn more, start your googling with these keywords:
Food stock: the total amount of any particular food existing at any point in time
Strategic reserve: food intentionally kept on reserve to be sold when supplies otherwise become low
Stock to use ratio: the amount of stock of any given food at any point in time as a fraction of the total annual consumption of the commodity

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Credits (and Twitter handles):
Script Writer: Peter Reich
Script Editor: Alex Reich (@alexhreich)
Video Illustrator: Jessika Raisor
Video Director: Emily Elert (@eelert)
Video Narrator: Emily Elert (@eelert)
With Contributions From: Henry Reich, Kate Yoshida, Ever Salazar, David Goldenberg
Music by: Nathaniel Schroeder:



Atkinson, A., Siegel, V., et al. 2009. A re-appraisal of the total biomass and annual production of Antarctic krill. Deep Sea Research Part I: Oceanographic Research Papers. Volume 56, Issue 5, 727-740

FAO. World Food Situation

FAO. World Cassava Situation and Recent Trends

Kaspari, M., Weiser, M.D. 2012. Energy, taxonomic aggregation, and the geography
of ant abundance. Ecography 35:65-72.

National Geographic

National Geographic

Penn State University Extension. Oil factsheet: oilseed presses. 7pp (undated).

Ritchie, H., Roser, M. 2018. “Meat and Seafood Production & Consumption”. Published online at Retrieved from: ‘

Sanderson, MG. 1996. Biomass of termites and their emissions of methane and carbon dioxide: A global database. Global Biogeochemical Cycles 10, 543-557.


USDA ISSN: 1554-9089, World Agricultural Supply and Demand Estimates, February 8, 2018;
(latest monthly update)

Wilson, RW. et al. 2009, Contribution of Fish to the Marine Inorganic Carbon Cycle, Science 323, 359-362

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