Simple Interest Calculator

Simple interest ignores compounding — interest is charged only on the original principal. It's common for short-term personal loans, some auto loans, certain bonds, and back-of-envelope estimates. For anything longer than a year or with reinvested earnings, use the Compound Interest Calculator instead — the results diverge quickly.

Comparing a simple-interest loan quote against an amortizing one? Run the same principal and rate through the Loan Calculator to see the true monthly payment and total cost.