Find out how much house you can afford with HypoNavi's offline affordability calculator. Income, debt-to-income ratio, and down payment — all in one free app.
The question every aspiring homeowner eventually asks is:
HypoNavi: Mortgage Calculator includes a full affordability calculator that runs completely offline. No internet connection, no account, no data shared with anyone.
When a lender evaluates how much they will loan you, they focus primarily on your debt-to-income ratio (DTI). This is the percentage of your gross monthly income that goes toward debt payments — including the proposed mortgage payment itself.
There are actually two versions of DTI that most conventional lenders look at:
This is the percentage of your gross monthly income that would go to housing costs. Most conventional lenders prefer this to stay at or below 28%. Housing costs in this calculation typically include principal, interest, property taxes, and insurance (PITI).
Formula: (Monthly housing costs) / (Gross monthly income) x 100
Example: If your gross monthly income is $6,000 and your total housing costs would be $1,500, your front-end DTI is 25% — comfortably within the 28% guideline.
This is the percentage of your gross monthly income that goes toward all debt payments combined — including housing, car loans, student loans, credit card minimum payments, and any other recurring debt. Most conventional lenders prefer this to stay below 36-43%, depending on the lender and loan type.
Formula: (All monthly debt payments) / (Gross monthly income) x 100
HypoNavi's affordability calculator takes in four key inputs:
Based on these inputs, HypoNavi calculates the maximum home price you can afford while staying within standard debt-to-income ratio guidelines.
The affordability calculator gives you a maximum figure, but it is important to understand that maximum and comfortable are not the same thing. Qualifying for a $450,000 mortgage does not mean a $450,000 mortgage is financially wise for your situation.
Consider these factors beyond the DTI calculation:
Your down payment directly affects your affordability in two ways. First, a larger down payment means a smaller loan and a smaller monthly payment, which increases how much house you can afford at a given income. Second, putting down less than 20% on a conventional loan typically triggers private mortgage insurance (PMI), which adds to your monthly housing cost and reduces your purchasing power.
Use HypoNavi to experiment with different down payment scenarios. Try 5%, 10%, 15%, and 20% and compare the resulting loan amounts and monthly payments. The visualization helps you understand exactly what impact saving for a larger down payment has on your monthly budget.
Financial advisors commonly cite a few rules of thumb worth knowing:
These are starting points, not rigid limits. Your specific situation — job stability, future income growth, local tax rates, and personal spending habits — all play a role in what truly makes sense for you.
HypoNavi's affordability calculator is free, offline, and requires no account. Enter your income, debts, and down payment to get an immediate realistic answer to the question of
Run as many scenarios as you want without worrying about your data being captured or sold.