Compound Interest Calculator
Project how savings or investments can grow with compound interest and optional monthly contributions.
How it works
- 1
Enter your values in the fields.
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Results update automatically as you type.
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Use Reset to clear and try another scenario.
Why use this calculator
- Includes monthly contributions
- Shows interest earned
- Adjustable compounding
- Educational growth scenarios
Why compounding matters
Compound interest applies returns on both principal and accumulated interest. Small rate or contribution changes can meaningfully change long-term results.
Using contributions
Add a monthly contribution to model regular investing. FlyCalculator estimates future value, total contributed, and interest earned.
Frequently asked questions
What does compounds per year mean?
It is how often interest is applied (e.g. 12 = monthly).
Are taxes included?
No. Taxes and fees are not modeled.
Is past performance guaranteed?
No. This is a mathematical projection, not a forecast of real markets.