Interest Rate Calculator — Find the Rate You Were Charged
Calculate the effective interest rate from a starting principal and final amount. Supports compound and simple interest across any time period.
Interest Rate Calculator
Results below
Enter Values
Effective Annual Rate (EAR)
▲ 7.7144%
Rate per Period (0.08333333333333333 year)
0.6212%
Total Interest / Growth ($)
▲ $4,500.00
Total Return on Principal
▲ +45.0000%
Formula Applied
r = n × [(A/P)^(1/nt) − 1]
Scenario Comparison
Embed Code
Copy and paste this HTML snippet into any web page to embed this calculator directly.
<iframe src="http://127.0.0.1:59362/embed/finance/interest-rate-calculator?ref=embed" title="Interest Rate Calculator — Find the Rate You Were Charged" width="100%" style="max-width:600px; border:none; height:500px;" loading="lazy"></iframe>
Direct Link
Share this link to let others open the calculator in their browser.
EAR accounts for compounding — it is the true annual rate
Total Interest
$4,500
Total Growth
45.00%
Related Calculators
Reviews
No reviews yet. Be the first to share your experience with Interest Rate Calculator — Find the Rate You Were Charged.
Write a Review