Instant calculator
Compound Interest Calculator
Use the compound interest calculator to estimate future account value when you combine an opening balance, recurring monthly deposits, and an annual return assumption.
How to use
Quick steps
- Enter starting balance, monthly contribution, annual return, years to grow.
- Review the instant answer block and supporting calculations.
- Compare the result with related tools in the same category before making a decision.
Formula
How this calculator works
Future value = principal growth + monthly contribution growth with monthly compounding
Investment returns are never guaranteed. Use conservative assumptions for planning.
FAQ
Common questions
How does the compound interest calculator work?
It uses Future value = principal growth + monthly contribution growth with monthly compounding. Enter starting balance, monthly contribution, annual return, and years to grow to generate an instant estimate.
When should I use this compound interest calculator?
Project how savings can grow with compounding and monthly contributions.
What should I keep in mind?
Investment returns are never guaranteed. Use conservative assumptions for planning.