Simple Interest Calculator
Fill in the values and the answer updates as you type.
How the Simple Interest Calculator works
Interest = principal × rate ÷ 100 × years.
Inputs and results
The Simple Interest Calculator takes 3 inputs and gives 2 results.
What you enter
- Principal ($) — starts at 10000.
- Annual rate (%) — starts at 5.
- Years (yrs) — starts at 3.
What you get
- Interest
- Total amount
Example: Simple Interest Calculator with the starting values
With principal 10000 $, annual rate 5 % and years 3 yrs, the calculator returns:
| Interest | $1,500 |
|---|---|
| Total amount | $11,500 |
Change any value above and the results update straight away.
Simple Interest Calculator FAQ
How do I use the Simple Interest Calculator?
Enter principal, annual rate and years in the fields, then read interest and total amount in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Simple Interest Calculator calculate?
Interest earned without compounding. It returns interest and total amount from the 3 values you provide.
What values does the Simple Interest Calculator start with?
It opens with principal 10000 $, annual rate 5 % and years 3 yrs so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Simple Interest Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Simple Interest Calculator for financial decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm financial decisions with a qualified professional. See the Disclaimer for more.