Interest Calculator
Simple or compound interest growth over time.
Frequently asked questions
What does the Interest Calculator do?
Simple or compound interest growth over time. Enter your values and get an instant estimate in your browser — free, with no signup.
Is the Interest Calculator free to use?
Yes. OpenCalcy calculators are free to use, work on mobile, and keep favorites privately in your browser.
How is the Interest Calculator calculated?
It uses this formula: A = P(1+r/n)^(nt)