Money
Compound Interest Calculator — Monthly Savings Growth
Explore how a starting balance and regular monthly contributions could grow.
Open full calculator ↗Free to use. No account needed to calculate.
How to use it
- Use the calculator above and replace the example numbers with your own.
- Check the units and choices beside each input. Your result updates as you type.
- Review the breakdown, then share a copy or carry the answer into another calculator.
How the calculation works
Each month: new balance = previous balance × (1 + annual nominal rate ÷ 1200) + monthly contribution. Contributions are added at the end of the month.
A worked example
These are illustrative inputs, not recommendations. The result is calculated with the same engine used by the tool.
- Starting balance ($)
- 10,000
- Monthly contribution ($)
- 250
- Annual nominal return (%)
- 6
- Years
- 10
Questions about Compound Interest Calculator — Monthly Savings Growth
What does this calculator do?
Explore how a starting balance and regular monthly contributions could grow.
Can I calculate without an account?
Yes. Calculate for free without signing in. Sign in only if you want to save calculations and personal plans.
What to keep in mind
The model assumes a constant return and monthly compounding. It excludes fees, tax and inflation. The graph illustrates your assumptions, not a guaranteed investment outcome.
Keep exploring
Guide updated November 5, 2026 · About Calcuvero & your privacy