Using the Loan Calculator is pretty simple. Enter the data asked for on the screen (Principal Amount, Interest Rate, Payment Period, Term/Length Of Loan, Payment Amount, optional First Payment Date). Press CALCULATE to calculate the loan (or RESET to clear all the entry fields on the screen and reenter data). When CALCULATE is pressed, the loan calculator will build a new screen (web page) with your loan data included. You can print this information to a printer using the print command on your browser (assuming you know how to print from your browser). Below is a summary of the fields (data) to be entered. This summary will hopefully answer any questions you may have.
1. PURCHASE PRICE  Enter the sale amount of the item you are financing.
2. DOWN PAYMENT  Enter the amount (if any) you are putting down on the purchase.
3. SALES TAX  Enter the percentage (if any) of sales tax applicable to this purchase. Enter 5% as 5
4. YEARLY INTEREST RATE  Enter the yearly interest rate (APR) for the loan. Enter 10.5% as 10.5. To have the interest rate of a loan figured by the calculator, leave this field blank, enter a PAYMENT AMOUNT and any TERM (LENGTH OF LOAN) except for Calculate Term (see PAYMENT AMOUNT and TERM below).
5. PAYMENT PERIOD  Choose one of eight (8) options. Monthly will calculate the loan for a payment period (number of days between each payment) of 30 days. Annually  360 days. Quarterly  90 days. SemiMonthly  15 days. BiWeekly  14 days. Weekly  7 days. If you choose the option Other , you will be prompted after pressing CALCULATE to enter the payment period in days. The Other option is included to allow you to enter a payment period (example: 6 days) other than monthly, biweekly, or weekly, ect. If the Other option for PAYMENT PERIOD is choosen, TERM (LENGTH OF LOAN) must be set to Other or it must be set to Calculate Term. The Mortgage BiWeekly option will calculate a monthly payment, divide it by 2, and then it will apply this payment amount biweekly (payment every 14 days/average of 26 payments a year). This should result in an average of two (2) extra payments a year, which should pay off the loan faster and with less interest than a conventional mortgage or loan. Please Note: To correctly estimate how mortgage biweekly payments can pay off a conventional mortgage loan faster and with less interest, the TERM (LENGTH OF LOAN) must be set to the length of a conventional mortgage loan (usually 15 or 30 years) . If you enter a PAYMENT AMOUNT coupled with the Mortgage BiWeekly PAYMENT PERIOD, the calculator will assume this payment amount is a monthly payment amount and it will calculate the mortgage biweekly payments accordingly. The Mortgage BiWeekly option may be disabled by the web site owner. If so, you will probably see the option N/A  for
not available.
6. TERM (LENGTH OF LOAN)  Choose one of several options for the length (term or number of payments) of the loan. If you don't find an option that fits your loan, chose Other . The Other option will prompt you to input the length of the loan (number of payments) when you press CALCULATE. The Calculate Term option allows you to enter a payment amount in the PAYMENT AMOUNT field and the calculator will figure the term. See below for more details.
7. PAYMENT AMOUNT  This field should be set to 0 if you would like the loan calculator to figure the payment amount for each pay period. However, the PAYMENT AMOUNT field is provided so that if you know the payment amount of each loan payment, you can enter it here and the loan calculator will use this payment as the basis of its other loan calculations (such as calculating the term). This feature is useful if you have a loan and you would like to see the amortization and/or payment dates for that loan. If you do enter a payment amount, you must set TERM (LENGTH OF LOAN) to Calculate Term or you must leave INTEREST RATE blank.
8. FIRST PAYMENT DATE  Enter a date here if you wish the loan calculator to date each payment. Entering this field is optional. This field is only used if CALCULATE DETAILED PAYMENT AMORTIZATION is set to YES .
9. IS THIS A MORTGAGE LOAN?  CHECK THIS if you wish to calculate the loan estimate as a mortgage loan. Calculating the loan estimate as a mortgage loan will figure estimates for taxes and insurance and add these estimates to your payment. Checking this option will also display estimated closing costs according to points. This option has no effect if the PAYMENT AMOUNT field is other than 0. UNCHECKED is the default.
10. CALCULATE DETAILED PAYMENT AMORTIZATION  CHECKING this option will cause the calculator to display each payment (with a payment date if you entered FIRST PAYMENT DATE), along with displaying the interest accrued during the period, amount applied, and the new balance. UNCHECKED is the default. Be aware that the calculation and display of each payment can considerably slow or disrupt display of the results in some browsers.
Notes and Assumptions
1. Scripting (JavaScript®) must be enabled in your browser in order for the calculator to work.
2. This calculator is for APPROXIMATION only. This is not an offer to lend. Accuracy of the results is not guaranteed. The results of this calculator may vary greatly from the results of an actual loan. Please consult your lender for the actual numbers.
3. In most cases, a 360 day year is used for all of the calculations. Some exceptions apply when a WEEKLY, BIWEEKLY, or OTHER option is used. In those cases, a 364 or 365 day year may be used for some or all of the calculations. Also, in some results when a WEEKLY, BIWEEKLY or OTHER option is used, the amortization schedule will list DATED payments on each PAYMENT PERIOD, which in some situations may resulting in a slightly shorter or slightly longer amortization schedule as listed by date.
4. The option "Calculate Detailed Payment Amortization" MAY be slow in and/or not work in producing results in SOME browsers (generally a browser running on an older system). 
