How to use this calculator
Calculate time to double at a continuous growth rate. Enter continuous growth rate per period (%). The result updates when you change an input. To compare two sets of inputs, save scenario A, then enter the second set; the result panel shows the difference.
Formula and limits
Doubling time = ln(2) ÷ continuous rate. Rate is entered as a percentage per chosen time unit.
Worked example
The following example uses the calculator’s starting values. It is an illustration of the method, not a recommended target.
| Input | Example value |
|---|---|
| Continuous growth rate per period (%) | 5 |
Periods to double: 13.863
Interpreting your result
These are simplified mathematical models with explicit assumptions. Real populations and biological systems may not follow a constant exponential rate. No clinical dosing or treatment use is intended.
Comparing alternatives
Save the first result as scenario A, then change one input. The comparison shows the numeric difference; it does not label either result as better. Choose inputs that describe realistic alternatives. Values shown on screen are rounded, so calculations from rounded intermediate results may differ slightly.