Compound Interest Calculator
Total and interest amount
What Is a Compound Interest Calculator?
A compound interest calculator helps you determine how your money grows when interest is added to the principal and future interest is calculated on the new total. It is widely used in banking and long-term investments.
How to Calculate Compound Interest
The principal grows each period because earned interest becomes part of the balance. The calculation uses exponential growth.
Formula
Total = Principal × (1 + Rate/100)n
Interest = Total − Principal
Compound Interest Example
If you invest 1000 at 10% for 2 periods: The total becomes 1210 and the interest earned is 210.
Where Is This Used?
- Bank deposits
- Investment growth
- Retirement planning
- Loan calculations
Frequently Asked Questions
Why is compound interest higher?
Because each period’s interest is calculated on the updated total, not just the original amount.
Does interest earn interest?
Yes, in compound systems previously earned interest becomes part of the base.
The Math Behind Compound Interest
Compound interest is based on exponential growth, meaning returns can accelerate over time.
You Might Also Need
- Simple interest
- Profit calculator
- Percent calculator
- Price increase