Use our free Compound Interest Calculator to get a clear estimate in seconds. Enter your values and see an instant result. Create a free account if you want your inputs saved for next time.
How to use this compound interest calculator
- Enter each requested value using the units displayed beside the field.
- Select any options that match your situation, then choose Calculate result.
- Review the main answer and supporting values. Change any input to compare another scenario.
The formula
Future value combines P(1+r/n)ⁿᵗ with the future value of monthly contributions.
The calculator uses the full precision of your inputs and rounds only the values shown on screen. This helps avoid compounding rounding errors.
Worked example
$10,000 at 7% for 10 years with $200 monthly contributions grows to approximately $54,300.
Keep in mind: This result is an estimate for planning and education. It does not replace personalized financial, medical, legal, or other professional advice.