Finance
Debt-to-Income Calculator
- Browser-based
- No signup
Enter gross monthly income, housing payment, and other monthly debt payments to estimate front-end DTI, back-end DTI, and a simple rating based on common lender guidelines.
100% Client-Side
Your data never leaves your computer.
How to use this tool
Enter gross monthly income, your monthly housing payment (rent or mortgage), and other monthly debt payments such as car loans, student loans, and credit cards. Review front-end and back-end DTI ratios and the guideline rating.
Worked example
Example: $7,000/month income with a $1,800 housing payment and $600 in other debts gives a 26% front-end DTI and a 34% back-end DTI.
How it works
Enter your gross monthly income, housing payment, and other monthly debt payments. Front-end DTI is housing divided by income. Back-end DTI is total monthly debt divided by income. Ratings use common lender guidelines and are estimates only.
Limitations
Lenders use their own DTI definitions and may include or exclude certain debts. This is a planning estimate only.
Privacy and file handling
Your data is processed in your browser and is not uploaded to our server.
Accuracy & methodology
This section documents how the calculator works, what it leaves out, and when results were last reviewed. Figures are educational estimates—not professional advice—and are not labeled "current" unless tied to automatically updated reference data.
- Formula source or methodology
- DTI = total monthly debt payments ÷ gross monthly income × 100.
- Jurisdiction
- US mortgage underwriting context (generic)
- Unit system
- Currency per month; percent DTI
- Rounding method
- Percentages round to two decimal places unless shown as whole percents in the UI.
- Assumptions
- User-entered debts and income
- Gross income before tax
- Known omissions
- Not tax, legal, investment, or lending advice. Confirm material decisions with qualified professionals.
- Lender-specific front-end vs back-end DTI definitions
- Proposed housing payment vs current debts only
- Test cases (automated)
- $2k income, $500 debt → 25% DTI
- Version & last verified
Logic version 1.0. Content and formulas last verified .
Important notice
Results are estimates for educational purposes and are not financial advice. Lenders may use different formulas. Consult a qualified financial professional for personal guidance.
Frequently asked questions
What is front-end vs back-end DTI?
Front-end DTI is housing payment divided by gross monthly income. Back-end DTI is total monthly debt payments divided by income.
What DTI rating bands are used?
Under 20% is excellent, under 36% is good, 36–43% is fair, and 43% or more is high. Lenders may use different cutoffs.
Is this a lending decision?
No. This is a simple estimate. Actual underwriting uses more factors than DTI alone.
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