Finance tool
Annual Interest Calculator
Calculate interest earned or charged over a number of years using simple annual interest.
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How To Use Annual Interest Calculator
Quick notes to help you understand the result before you act on it.
Overview
Use this annual interest calculator for quick simple-interest estimates.
Enter principal, annual interest rate, and years to calculate interest and total amount.
Annual Interest Formula
- Simple interest = principal x annual rate x years / 100.
- Total amount = principal + simple interest.
Practical Tips
- Use compound interest for deposits where interest is reinvested.
- Use the same currency for principal and result interpretation.
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FAQ
Common questions about this tool.
Does this compound interest?
No. It uses simple annual interest.
Can I calculate interest for less than one year?
Yes. Enter a decimal such as 0.5 for half a year.