Net Present Value (NPV) Calculator is an online tool programmed to calculate the excess or shortfall of cash flows in present value terms once the financing charges are met. The NPV can be calculated from the given inputs of Annual discount rate, Initial cash and other cash flows of the business. The rate used to discount future cash flows to the present value is a key variable of this process. When it comes to online calculation, this NPV Calculator can assist you to calculate the NPV value, as an indicator shows whether it is greater than zero or less than zero. When the NPV value is greater than zero then the project will be accepted and it would add more value to the firm. It would subtract the value to the firm if the NPV value is less than zero and the project will be rejected. Therefore NPV is an indicator represents how much value of an investment or project add to the firm.