the first of its kind on the internet
is a real-time, rolling, 12-month global GDP estimate. 

About the Data:

The fundamental identity of national income accounting is:

Production = Income = Expenditure

National income, expressed as GDP, represents the level of economic activity in the aggregate during a given period of time. Growing GDP reflects a growing population × per capita consumption. In the vast majority of applications, the period of time for GDP reporting is one calendar year.

The CASSE GDP Meter was initiated on June 27, 2019, at which time a global GDP estimate was extrapolated from the latest (2017) World Bank calculation of global GDP. The extrapolation rate was equal to the GDP growth rate for the period 2012-2017, or 1.59%/year.

CASSE IT interns developed a database of extrapolated real-time estimates for every remaining second of 2019, as well as a program to populate the online meter with these estimates. The meter is based on the estimated increase per tenth of a second for every second of the day.

The GDP growth database is updated each year following World Bank updating of global GDP estimates. World Bank GDP estimates are available at The World Bank website. Inquiries about the CASSE GDP Meter may be emailed to

This page contains technical information about the GDP meter. To learn more about the meter’s development and leave a comment, see Brian Czech’s explainer, “Be Very Alarmed!” Introducing the Global GDP Meter.


Coal mine in Jahria, India — TripodStories- AB, CC BY-SA 4.0 | Deepwater Horizon oil spill in 2010 — Kris Krüg, CC BY-SA 2.0 | Industrial forest management, Olympic Peninsula, Washington — Sam Beebe, CC BY-SA 2.0 | Empty watering hole during drought at Walnut Creek Ranch, CA in 2014 — USDA photo by Cynthia Mendoza, CC BY-SA 4.0 | Loss of white collar jobs — Adobe Stock Image | Workers in a rubbish dump — Adobe Stock Image | San Diego-Tijuana border  — U.S. Army photo by Gordon Hyde | Syrian refugee from Deir Ezzor arrives in Greece — Public Domain | Indian & Pakistani security forces at the Wagah border —  Gargisharma13, CC BY-SA 4.0 | South Ossetia War 2008 — Yana Amelina, CC BY-SA 3.0Counterterrorism drills in the Arabian Peninsula in 2017 — U.S. Army photo by Timothy Lawn | Clashes in Kyiv, Ukraine, February 18, 2014 — Mstyslav Chernov/Unframe, CC BY-SA 3.0.

S McCorry