NubraNubra Compound Interest Calculator
See how an initial amount could grow when interest is added to your balance and earns interest over time.
10 years (120 months)
Growth breakdown
Year-end balancesOverview
What is a Compound Interest Calculator?
A compound interest calculator estimates how a starting amount may grow when earned interest remains in the balance. Future interest is then calculated on both the original amount and accumulated interest. Your estimate depends on the amount, annual rate, duration and compounding frequency you enter.
Quick start
How to use the Compound Interest Calculator
- 01
Enter your starting amount
Add the one-time amount you want to model.
- 02
Set the interest assumptions
Choose the annual rate, duration and compounding frequency.
- 03
Explore the growth
Review the estimated final amount and period-by-period interest, then adjust the inputs.
The calculation
How is compound interest calculated?
- A
- P × (1 + R/(100n))n × t
- Interest earned
- A − P
The final amount when interest is added to the balance each compounding period.
The final amount less the initial amount.
- A
- Final amount
- P
- Initial amount
- R
- Nominal annual interest rate as a percentage
- n
- Compounding periods per year
- t
- Duration in years
Your results
Understanding your compound interest estimate
Simple interest is calculated only on the original principal; compound interest also includes previously accumulated interest.
Initial amount
The one-time principal used in the calculation.
Interest earned
The estimated increase above your starting amount.
Final amount
Your initial amount plus accumulated interest.
Compounding frequency
How often interest is added to the balance. At the same positive nominal annual rate, more frequent compounding produces a higher estimated balance.
Why use it
Make compounding easier to understand
See interest on interest
Understand how reinvested interest contributes to growth.
Compare durations
Explore the difference between shorter and longer periods.
Compare compounding frequencies
Change how often interest is added while keeping other inputs fixed.
Build clear scenarios
Separate the starting amount from estimated interest.
How is compound interest different from simple interest?
Simple interest is calculated on the original principal. Compound interest is calculated on the principal and previously accumulated interest.
What does compounding frequency mean?
It is the number of times interest is added to the balance each year: once annually, twice half-yearly, four times quarterly or twelve times monthly.
Can I add regular monthly deposits?
Not in this calculator. It models a single initial amount. Use the SIP Calculator to explore regular monthly investments.
Is the final amount guaranteed?
No. This is a mathematical projection using your inputs. Actual outcomes depend on the terms and performance of the product you choose.
Are taxes and inflation included?
No. The displayed amount is before taxes and fees and is not adjusted for inflation.
What happens when the duration contains part of a compounding period?
The calculator uses a fractional-period mathematical estimate. A financial provider may use a different method for incomplete periods.
Assumes a constant rate, reinvested interest and no additional deposits or withdrawals. Partial periods use a mathematical estimate. Taxes, fees and inflation are excluded. This calculator is for illustration only and is not investment advice.