This calculator is implemented using JavaScript 1.1, and No CGI is involved.
So if your Web-Browser does not support Javascript, this calculator will
not work for you, Sorry! The programmer: Andy Lau
created this calculator has tested its functions and has satisfied the
results. However, Andy Lau and his Web-Server Provider cannot be held
responsible for anyone who misuses this program.
Please send any comments, questions, or problems of this calculator to
the programmer at
Andy.Lau@noaa.gov.
To use this calculator,
just pick anyone of 4 functional options (1) to (4) at the right-hand column
and change the 3 values that you know at the middle of the input areas,
your selected option will be computed automatically for you.
Note that a different web browser may behave differently.
When a value is entered, the value to be determined will be computed
and displayed automatically.
Some browsers may show nothing until you click on other input area.
So you may need to get use to how this calculator is run on your browser.
Note the Number of Payaments/Year is set to 12. This mean the Interest Rate
is in an Annual rate, and Number of Payments = 360 means it is a 30 years loan.
Areas (1) to (4) and (6) to (8) are for both input and output. The rests are
output areas only. Any input for (6), (7), or (8) will cause area (6) to (11)
to be updated and automatically turn on the Amortization Table except option
area (8). More operational behavior of this Calculator
is listed after the printing area of the Amortization Table.
The JavaScript: uses double-precision
for all the calculations, the final results, specially for the Total
Payment and Interest, may not match with the results computed from other
software that uses single-precision calculations.
This calculator checks all the input values every time you enter or
change anyone of the inputs. When there is problem, an error message
will be displayed. Note that changing the numbers in the output areas such
as the Total Payment or Interest will cause No actions to the calculator.
When you are ready to see the Amortization Table and trun it On, the
On/Off button may disappear for while and reappear after all the
calculations are done and displayed at the Table area.
Note that if you have a pluge in program running that can eliminates
advertisement, i.e., remove additional pop up browser, which may delete the
message box from the Javascript to show the Amortization Table is being
calculated. When that happens, results may not be shown in the
Amortization Table!