Simple Interest Without Reinvestment
Calculate interest that does not itself earn interest. Unlike a compounding account or a declining loan balance, the entered principal is assumed to remain unchanged throughout the period.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
Numbers stay on your device. Nothing is sent to a server.
Next step
How to use this tool
Enter USD principal, annual percentage and years. For six months use 0.5 years; there are no actual date inputs or contractual 360/365-day conventions in the form.
Results and examples
The headline is interest, while another row shows principal plus interest. Keep them separate and read both as before-tax arithmetic because fees and tax are not supplied.
Worked example
USD 1,000 at 5% for two years earns USD 100 and totals USD 1,100.
Limitations
- Compounding, additional cash flows and declining principal are excluded.
- Taxes, fees and actual day-count agreements are absent.
Fields
| Field | Guidance and constraints |
|---|---|
| Principal | Accepted range: 0–100000000 · Input step: 100 |
| Annual interest rate | Accepted range: 0–100 · Input step: 0.1 |
| Years | Accepted range: 0.1–60 · Input step: 0.1 |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
What if interest is reinvested?
Use a compound-interest calculator instead.
Should I enter 6 for six months?
No. The field is years, so enter 0.5.
Related tools
You do not need to start over. Continue with the tool that fits your next step.
