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`MA = f($ "MP" , "i" %, 30 )`

Enter a value for all fields

The **Mortgage Affordability** calculator estimates the maximum principal one can borrow on a fixed rate loan and support with a monthly payment based the interest rate and loan duration.

**INSTRUCTIONS**: Choose units and enter the following:

**(MP)**Monthly Payment**(n)**Loan Duration**(i)**Fixed Interest Rate (default is the current 30 year fixed rate)

**Affordable Loan Amount (AM): **The calculator returns the amount that can be borrowed in US dollars. However, this can be automatically converted to compatible units via the pull-down menu..

This calculator loops through the monthly payment equation unit it reaches a principal amount that drives a monthly payment in excess of the preferred monthly payment (MP). NOTE: this does not take into account that the first few years of a mortgage are largely interest payments, which is usually a tax deduction. If your monthly payment is based on your personal history of paying rent, which is NOT tax deductible, you will find that it is not a 1 to 1 comparison. One one hand, you will get tax money back, on the other, you will have expenses maintaining the property that the landlord used to cover.

This formula is commonly used for home mortgages and other simple debt. It is typically used in a way were the periods (t) are in years, and the number of payments per period (n) is 12 for the number of months. The word AMORTIZATION comes from the Middle English *amortisen *which means "to kill". In essence, this is the amount needed on a regular basis "to kill" a debt. The formula for amortized payment is:

`MP = (P * (r/12)) / (1- (1+(r/12))^(-12*N))`

where:

- MP = Monthly Payment
- r = Annual Interest Rate
- N = Number of Years

**Monthly Loan Payment:**Computes the monthly payment of a fixed interest rate loan (e.g., home mortgage or car loan).**Credit Card Equation:**Computes the number of months to pay off a credit card.**Mortgage Affordability**: Compute the amount of principal one can borrow based on monthly payment, duration and interest rate.**Leverage Ratio**: Calculates a ratio describing debt to income.**Compound Interest:**Computes the compounded interest on a fixed interest rate investment**CAGR:**Computes the compounded annual growth rate achieved on an investment.**Rule of 72:**Provides a quick estimate on time to double an investment**Simple Interest Earned:**Computes a rough estimate on interest earned over time.**Wage Calculator**: Computes the annual, monthly and weekly pay amounts base on hourly wage and hours per week.:**Current Mortgage Rates**- 30 Year Fixed Interest Rate: 7.05 %
- 15 Year Fixed Interest Rate: 6.48 %
- 7/6 SOFR ARM: 6.92 %