Exponential growth calculator

Some things grow or decay in an exponential way. This means that for every time unit (e.g. a day) the metric changes with ± the same percentage. If you can say "it doubles every _ days" => this means it has exponential growth/increase! If you can say "it drops to half every _ days", it has logarithmic decay/decrease!

Growth calculation

Exponential factor

  • 1714 → 103321 = multiply by 60.28 (or + 5928.06 %) in 14 day(s)
  • multiply by 1.01 (or + 1.23 %) in 1 hour
  • multiply by 1.34 (or + 34.02 %) in 1 day
  • multiply by 7.76 in 1 week
  • multiply by 7373.07 in 1 month
  • goes x 2 every 2.37 day(s)
  • goes x 5 every 5.5 day(s)
  • goes x 10 every 1.12 week(s)
  • goes x 100 every 2.25 week(s)

Extrapolation of data points

start point1,714 data point
after 84.00 hour4,776interpolation
after 7.00 day13,308interpolation
after 10.50 day37,080interpolation
after 14.00 day103,321 data point
after 17.50 day287,894extrapolation
after 21.00 day802,190extrapolation
after 24.50 day2,235,229extrapolation
after 28.00 day6,228,255extrapolation
after 31.50 day17,354,449extrapolation
after 5.00 week48,356,546extrapolation
after 5.50 week134,740,986extrapolation
after 6.00 week375,443,135extrapolation

Examples

Carbon-14 has a radioactive half-life of 5730 years
Social Media: Facebook grew from 1 mio MAU in 2004 to 2.32 bil in 2018
Moore's Law: number of transistors on a chip doubles every 2 years (1990-2010)
Growth of people infected by COVID-19 in the USA between 15 and 29 March 2020
Business: month on month double digit growth = x 3.14 per year