Algebra & Equations
Doubling Time
Time for exponential growth to double.
Formula
Formula
t = ln 2r
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| r | growth rate per period | real number (ℝ) | — | input |
| t | doubling time | computed result | — | result |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givenrate r = 0.07
Result9.902102579
Example 2
Givenrate r = 0.02
Result34.65735903