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Compound Interest Calculator

See how savings grow over time with monthly contributions and compound returns.

Your savings inputs

Monthly compounding on your starting amount plus contributions.

Initial amount$10,000

Monthly contribution$300

Annual interest rate7%

Years20 yrs

Assumes a constant rate of return. Real investment returns vary year to year and aren't guaranteed.

Future value

$168,432

After 20 years, compounded monthly

Total contributed$82,000

Interest earned$86,432

Return multiple2.05x

Contributions Interest

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