# Rule of 72 Calculator

Estimate how many years an investment takes to double at a given annual return using the Rule of 72.

Canonical: https://finamodel.com/tools/rule-of-72-calculator

## How to use it

Open the interactive calculator, enter your assumptions, and review the calculated outputs. Inputs stay in your browser.

## Related resources

- [Financial model templates](https://finamodel.com/templates)
- [Financial modelling guides](https://finamodel.com/blog)