Simple Interest Calculator
Calculate simple interest on a loan or deposit.
Simple Interest Calculator
$
%
Live result
Interest
$750
Total
$5,750
What it is
Simple interest is interest calculated only on the original principal — no compounding. Used for many short-term loans and bonds.
The formula
I = P × r × t (Principal × rate × time, no compounding)
Why it matters
Knowing the difference between simple and compound interest helps you spot when a deal is better (or worse) than it looks.
Worked examples
Try the example
Use the defaults above as a starting point — then adjust the inputs to match your situation.
Common pitfalls
- Double-check the units on every input — most errors come from mixing units.
- Round at the end, not in the middle of the formula.
Frequently asked questions
Related calculators
Embed on your site
Free to embed — attribution required
Add this simple interest calculator to your blog, help article, or landing page. Copy the snippet below.
<iframe src="https://searchcalculators.com/embed/simple-interest" width="100%" height="620" frameborder="0" style="border:1px solid #e5e7eb;border-radius:12px;" title="Simple Interest Calculator"></iframe>
Weekly playbook
One actionable business calculation every Tuesday.
Real frameworks for pricing, hiring, and software ROI. No fluff. Unsubscribe in one click.