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# Doubling Time Calculator

Calculate the doubling time for a constant growth rate.

Doubling Time Calculator
 Growth rate: %

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The Doubling Time Calculator is used to calculate the doubling time for a constant growth rate.

## Doubling Time Definition

In finance, the doubling time is the period of time required for an investment or money in an interest-bearing account to double in size or value. It is also applied to population growth, inflation, resource extraction, compound interest, and many other things that tend to grow over time.

## Doubling Time Formula

For a constant growth rate, the doubling time calculation formula is as follows:

Td = log(2) / log(1 + r)

Where:
Td = doubling time
r = a constant growth rate

## Doubling Time Table

Some doubling times calculated with the above formula are shown in the following table.

r%Tdr%Tdr%Tdr%Tdr%Tdr%Tdr%Td
0.1693.491.163.362.133.353.122.74.117.255.512.95116.64
0.2346.921.258.112.231.853.222.014.216.856.011.9126.12
0.3231.41.353.662.330.483.321.354.316.466.511.01135.67
0.4173.631.449.862.429.233.420.734.416.17.010.24145.29
0.5138.981.546.562.528.073.520.154.515.757.59.58154.96
0.6115.871.643.672.6273.619.64.615.418.09.01164.67
0.799.361.741.122.726.023.719.084.715.098.58.5174.41
0.886.991.838.852.825.13.818.594.814.789.08.04184.19
0.977.361.936.832.924.253.918.124.914.499.57.64193.98
1.069.662.0353.023.454.017.675.014.21107.27203.8

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