Age calculator
Your exact age on any date, from your DOB.
Open toolSimple interest calculator
Calculate interest without compounding.
Your input stays in this browser. No account needed.
THE QUICK GUIDE
How to use simple interest calculator
Enter the labelled values, then process it. Copy or download the result.
How it works
Interest = principal × annual rate ÷ 100 × years.
A useful example
Principal: 1000; Annual rate (%): 5; Years: 3 → Interest: 150 Total: 1,150
Good to know
Use consistent units and currency. These are general calculations; verify important results.