# I'm looking for help implementing Finance.js on my website

Link to the website that offers this solution is:
https://www.npmjs.com/package/financejs

All documentation is on Gitub:
(I have no idea how to put this on my website)

I need to do a GIANT series of financial calculations (PV, FV, PMT, i, n, IRR and others) that I usually do easily in Excel. The vast majority of cases I managed to solve with formulas, for simple and objective questions, but for a complex report, the amount of inputs and Math.js (plugin) that you have to use is so large that it becomes complex for maintenance and even for generating the calculus.

What I need is like a plugin. Thereâ€™s one I use (Excel Financial Calculator), very good, but itâ€™s incomplete (even in the PRO version). This plugin does not calculate the NPER (number of periods) or the RATE (â€śiâ€ť - interest rate).

What I need is for it to call in the input the result of the expression that looks like this:

``````#Total Number of Payments Type = Years
// e.g., If principal is \$20,000, rate is 7.5%, total number of payments is 5, and payment type is 0 (years), monthly payment is \$400.76.

[finance.AM](https://finance.am/)(20000, 7.5, 5, 0);
=> 400.76

#Total Number of Payments Type = Months
// e.g.,If principal is \$20,000, rate is 7.5%, total number of payments is 60, and payment type is 1 (months), monthly payment is \$400.76.

[finance.AM](https://finance.am/)(20000, 7.5, 60, 1);
=> 400.76
``````

It needs to be simple and fast. It can be through a call in the input or WorkFlows. Call is better that it doesnâ€™t load the page every time it changes the calculation.
Iâ€™m right at the beginning, Iâ€™m on the free version and I canâ€™t get out of place.

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