# Simple & Compound Interest Calculator

getcalc.com's **Simple & Compound Interest Calculator** is an online general purpose tool to calculate the simple or compound interest for the given principal amount.

## Definition & Formulas

**Simple Interest** is a measure of time value of money to calculate the interest return for the principal amount on a certain percentage of interest rate for a specific period of time. In simple interest calculation, the principal amount never change, during the interest accumulation period.

**Compound Interest** is a finance function or method used in the context of time value of money calculation, often abbreviated as CI, represents the interest on the principal amount on a certain percentage of interest rate for a specific period of time with either monthly or quarterly or half-yearly or yearly compounding frequency, where the principle amount gets changed after every compounding period.