Exponential Growth Calculator

Project compound growth and find the doubling time for any growth rate.

Starting value:

Growth rate (% per period):

Number of periods:

How to use

Enter starting value, rate and periods, then click Calculate. Everything runs in your browser — nothing is uploaded or stored.

How long to double at 7% growth?

About 10.2 periods (rule of 72 says ~10.3).

Is growth per year or per month?

Per whatever period you choose — just stay consistent.

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