# Compound Interest Calculator

Compound interest refers to the interest calculation method in which the interest of a certain interest period is calculated by adding the total amount of interest accumulated in the previous period to the principal, which is commonly referred to as "rolling interest".

The compound interest calculator can calculate the compound interest according to the calculation frequency of day, week, month or year by setting the initial capital investment, annual interest rate and period.

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#### IRR Calculator

Internal Rate of Return (IRR) Calculator is a calculator of calculating an investment’s rate of return. It could calculate IRR base on your input of outflow and inflows.

#### NPV Calculator

Net Present Value (NPV) Calculator is a calculator of calculating Net present value. It could calculate NPV base on your input of outflow and inflows.