On The Double

How long does a quantity take to double?

Our World in Data and news articles refer to the doubling time of COVID-19 confirmed cases and deaths.

This article looks at what doubling times are, and how to interpret this figure.

Doubling Times

A doubling time is the time it takes for a quantity to double in size, assuming constant growth. Researchers often calculate this figure for population growth, whether cells, animals, or humans.