Compound Interest Calculator

Visualize how your money grows with compound interest. Enter your initial investment, monthly contribution, interest rate, and time horizon to see a detailed growth chart. Compare two different rates side by side. Export your results as PNG or CSV.

About compound interest

Compound interest is the interest earned on both your initial investment and previously earned interest. It's often called 'interest on interest' and is the key driver of long-term wealth building.

Interactive chart with gradient area fill
Real-time updates as you adjust sliders
Compare two interest rates side by side
Yearly breakdown table with deposits, interest, and balance
Export chart as PNG or data as CSV
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