Simple Interest Calculator
Calculate simple interest earnings on principal loans and investments over time.
⚙️ Simple Interest Inputs
📊 Interest Result
Total Interest Earned
$750.00
Total Repayment / Balance: $5,750.00
| Metric | Amount |
|---|---|
| Principal | $5,000.00 |
| Simple Interest | $750.00 |
| Total Amount | $5,750.00 |
How to Use This Calculator
- Step 1: Enter principal, interest rate, and term in years.
- Step 2: View immediate interest and total repayment calculations.
Formula & Calculation Method
I = P × r × t | Total = P + I
Where the variables represent:
| Variable | Description & Units |
|---|---|
| I | Interest amount earned |
| P | Principal amount |
| r | Annual interest rate (decimal) |
| t | Time in years |
Worked Calculation Example
Scenario:
$5,000 invested at 5% simple interest for 3 years.
- I = $5,000 × 0.05 × 3 = $750
- Total = $5,000 + $750 = $5,750
Result: Total interest is $750.00 with an ending balance of $5,750.00.
Frequently Asked Questions
When is simple interest used?
Common in short-term loans under one year.
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Accuracy & General Guidance Disclaimer: This calculation tool is provided for educational and practical planning purposes. Formulas are verified against standard mathematical models. Do not rely on estimates as certified professional, financial, legal, or medical advice.