Simple Interest Calculator
Compute simple interest with the classic I = P × r × t formula — used for many short-term loans and bonds.
Interest (I)
750
Final amount
5,750
Formula
I = P × r × tHow to use the Simple Interest Calculator
- 1Enter the principal (P)
- 2Enter the annual rate (r) and time in years (t)
- 3Read the interest and final amount
Frequently Asked Questions
What is simple interest?
Interest calculated only on the original principal, never on accumulated interest: I = P × r × t.
Simple vs compound interest — which grows faster?
Compound interest always grows at least as fast, and faster after the first period, because interest earns interest.