Estimate monthly mortgage payments, total interest, total cost, and loan-to-value ratio.
Debt-to-Income Ratio Calculator
Use this free debt-to-income ratio calculator to measure how much of your gross monthly income is already committed to debt payments. It is built for searches like debt-to-income ratio calculator, DTI calculator, and mortgage DTI calculator.
Interactive calculator
$
Monthly Debt Payments
$
$
$
$
$
Debt-to-Income Ratio
29.6%
Good
Total Monthly Debt
$2,070
Housing DTI
20.0%
DTI guidelines
ExcellentBelow 20%
Good20% – 35%
Manageable36% – 43%
High44% – 50%
Very HighAbove 50%
How the math works
Formula
DTI = (D / I) × 100
- DTIDebt-to-income ratio, expressed as a percentage
- DTotal monthly debt payments — mortgage, car, student loans, credit cards
- IGross monthly income — pre-tax, all sources
Plain English
DTI is the single most important number mortgage lenders use to evaluate affordability. Below 36% is healthy; most conventional lenders cap at 43%. Gross income of $6,000/month with $2,000 in debts gives a 33% DTI. Adding a $1,500 mortgage pushes it to 58% — likely too high to qualify without paying down existing debt first.
How to use this calculator
- 1
Enter your gross monthly income and all recurring monthly debt payments.
- 2
Review your total DTI ratio and housing DTI ratio.
- 3
Compare the result with the guideline ranges to understand how lenders may view your profile.
Why this number matters
Lenders use DTI to evaluate borrowing risk, but it is also a useful personal finance metric. A high DTI can limit mortgage eligibility, reduce flexibility, and increase financial stress even when income looks strong on paper.
What this calculator helps you answer
- •What is my debt-to-income ratio for a mortgage application?
- •How does my housing payment affect total DTI?
- •Is my DTI in a range lenders generally consider safe?
Frequently asked questions
What is considered a good debt-to-income ratio?+
Many lenders prefer a DTI below 36%, and mortgage underwriting often uses 43% as an important ceiling. Lower is generally better.
Should rent be included in DTI?+
If you are evaluating housing affordability or comparing with future mortgage costs, including rent or housing payments is useful. For formal lender calculations, use the payment structure relevant to the application.
Does this calculator use gross or net income?+
It uses gross monthly income, which is the common basis for DTI calculations in lending.
Related calculators
Estimate debt payoff time, total interest, and how extra payments can accelerate repayment.
Estimate the right emergency fund target, current coverage, and time to full funding.
Turn the calculator into an ongoing system
Netquity gives you the calculators for discovery and the platform for follow-through: accounts, budgets, transactions, analytics, goals, and net worth tracking in one place.