Compound Interest Calculator - Calculate compound interest with detailed year-by-year breakdown, interactive growth charts, and comprehensive investment analysis including effective annual rate and growth projections.

Continuous Compounding Calculator - Calculate the continuous compounding interest.

Doubling Time Calculator - Calculate how long it takes for an investment or value to double at a constant growth rate. Features Rule of 72 comparison, multiple growth milestones, and interactive visualizations.

Rule of 72 Calculator - Use the Rule of 72 to instantly estimate how long it takes to double your investment at a given interest rate. Features interactive timeline visualization, comparison of approximation rules, and growth projections.

Simple Interest Calculator - Calculate the simple interest.