MihsabaHow to use
Calculate simple interest on the original principal only, without compounding previously earned interest. Choose years, months or days for the time period and see both the interest amount and ending total, with the distinction from compound interest kept explicit.
- Enter the principal amount.
- Enter the annual rate as a percentage.
- Enter the duration, choose years, months or days, and calculate.
How it is calculated
Example
Example: 10,000 at 6% per year for 18 months equals 1.5 years. Simple interest is 10,000 × 0.06 × 1.5 = 900, so the ending amount is 10,900.
Important notes
Use this tool only when the arrangement truly uses simple interest. Many loans and deposits use compounding or a different repayment method. Day-based periods are converted using 365 days for a general estimate.
Frequently asked questions
How is simple interest different from compound interest?
Simple interest is calculated only on the original principal; compound interest also earns or charges interest on accumulated interest.
How do I enter six months?
Choose months and enter 6; the calculator converts it to half a year automatically.
Can I use a negative rate?
This tool is designed for ordinary non-negative simple-interest scenarios and rejects negative rates.
Is this calculator free?
Yes. It is free to use and requires no account.