Financial Calculators
Simple Interest Calculator
Calculate simple interest from principal, annual rate, and time.
Result
--What does this calculator do?
Calculate simple interest from principal, annual rate, and time.
Formula
Simple interest = principal × rate × time.
Example calculation
A $5,000 principal at 6% for 3 years earns $900 simple interest.
Common use cases
- Basic lending
- Savings estimates
- Classroom examples
Limitations and accuracy notes
This calculator is for quick planning and education. Results depend on your inputs and may not include every real-world rule, fee, tax, health factor, or local requirement.
Simple Interest Calculator FAQ
Is this calculator free?
Yes. It gives quick estimates directly in your browser.
Should I use this as professional advice?
No. Use it as a planning aid and confirm important decisions with a qualified professional.