Monthly Compounding &
Simple Daily Interest Calculator

 

About the calculators

No information is saved or stored. All computations are done on your computer or device.

Amortization Calculator (with optional Over Payment)

This can be used as a normal Amortization Calculator by leaving the Over Payments field empty or "0".
If more than the minimum payment has been made for the life of the loan, enter it into the Over Payments field you can calculate the final payment amount and optionally the final payment date.

Principal Amount and Interest Rate are both obviously required.

The calculations are done using Months. If you enter a number into the Loan Length (years) field, it will convert that to months for you, and automatically fill in the Loan Length (Months) field.

OR

You can set the Start Date & Payoff Date and let the calculator determine the months.

If you have filled in the Loan Length (years) or Loan Length (Months), and want the Amortization to start from when the loan was signed, you can set the Start Date and leave the Payoff Date empty. The Amortization schedule will show the first payment 1 month after the start date.

Over Payments can be entered either way: As the total monthly payment made (payment + over-payment), or just the amount that was over paid.

Example

If your monthly payment is supposed to be $175 and you elect to round it up to $200. You can either enter 200 OR 25 into the Over Payments field. This calculator knows what you mean ;)

Title of Printed Page will be the heading when the page is printed.

The Formula Used:

M=P[r(1+r)n/((1+r)n)-1)]
M = the total monthly payment.
P = the principal loan amount.
r = your monthly interest rate.
n = number of payments over the loan’s lifetime.

Interest Calculator

This is a Monthly Compounding & Simple Daily Interest Calculator.

Principal Amount and Prompt Payment Interest Rate are both obviously required.

Simple Daily Interest:

Leave the Months Late field empty or "0".
Enter the number of days late (≤31) in the Days Late field.

The Formula Used:

T=P(r/360*d)
T = Total amount owed.
P = Principal or Invoice Amount.
r = Interest Rate.
d = the number of days for which interest is being calculated.

Monthly Compounding Interest:

Enter the number of months late in the Months Late field.
Optionally, enter the number of days late (≤31) in the Days Late field - if any.

Title of Printed Page will be the heading when the page is printed.

The Formula Used:

T=P(1+r/12)n*(1+(r/360*d))-P
T = Total amount owed.
P = Principal or Invoice Amount.
r = Interest Rate.
n = Number of Months late.
d = the number of days for which interest is being calculated.