Compound Interest Calculator

Project future value from a starting amount, rate, time, and monthly contributions.

Enter your numbers

Future value€50,969.84
Total contributions€34,000.00
Interest earned€16,969.84
Annual interest rate6%

Estimate assumes monthly compounding and end-of-month contributions.

Practical guide

Compound Interest Calculator

Worked example

Here is a simple Compound Interest example:

10,000 × (1 + 5% ÷ 12)¹²⁰ → ≈ 16,470.

Common mistakes to avoid

  • Use a conservative expected rate.
  • Results do not guarantee investment performance.
  • Fees and taxes can reduce the final value.

Frequently asked questions

What does the Compound Interest calculate?

Project future value from a starting amount, rate, time, and monthly contributions.

Which formula is used?

Future value = principal × (1 + r)ⁿ + recurring contributions with compounding

Can I rely on this result?

Use the result as a planning estimate. Check important financial, tax, legal, investment, or health decisions with a qualified professional.