# Doubling Time Calculator

This **Doubling Time Calculator** calculates the time it takes for an investment to double in value given a constant growth rate.

## How to calculate doubling time?

**Formula:** Doubling Time = log(2) / log(1+r)

r = interest rate

**Example: If an investment pays 8% interest, how long will it take to double the investment?**

**Step 1: Plug into formula and solve**

log(2) / log(1 + 0.08) = 9.01 years