Simple Interest Calculator
Calculates simple interest and the final balance.
Every calculation runs instantly in your browser, so your inputs are never sent to a server, and the tool is free with no sign-up. You can save the results as an Excel file with live formulas and reuse them later.
Inputs
- Principal ($)
- Annual rate (%)
- Time (years)
Example calculation
Total interest: $1,500.00
| Final balance | $11,500.00 |
|---|---|
| Principal | $10,000.00 |
Method & notes
Simple interest = principal × rate × time. No compounding.
Tips
Change any input and the result recalculates in real time. After downloading the Excel file, you can reuse it by editing only the yellow input cells.
FAQ
How does the Simple Interest Calculator work?
Calculates simple interest and the final balance. Simple interest = principal × rate × time. No compounding.
Can I save the results?
Yes. You can download the results for free as an Excel (.xlsx) file with live formulas that recalculate when you change the yellow input cells.
Is it free?
Yes — all Calcova calculators are free, and you can save results as an Excel file.