Quick answer
How do you calculate Debt-to-Income Ratio?
Use Debt-to-income ratio = Monthly debt payments ÷ Gross monthly income × 100. Enter the matching values above to calculate the result instantly.
What it measures
Understanding Debt-to-Income Ratio
Calculate monthly debt payments as a percentage of gross monthly income. Lenders may calculate front-end and back-end DTI differently and apply rules that vary by product and borrower.
Interpretation
What the result means
A 27.69% result means required monthly debt payments equal about 28% of gross monthly income.
Action
How to use it
Use the lender's debt and income definitions and evaluate the remaining cash after taxes and living costs.
Limits
What it leaves out
DTI is not an approval decision and does not capture credit history, assets, rates, expenses, or income stability.
The math
Debt-to-Income Ratio formula
Worked example
Example calculation
- Calculation
- $1,800 ÷ $6,500 × 100
- Result
- 27.69% DTI
Step by step
How to use this calculator
- 1Enter monthly debt payments, gross monthly income.
- 2Keep every input on the same time period and measurement basis.
- 3Review the result, then change one assumption at a time to test scenarios.
Decision support
When this calculator is useful
- Debt affordability
- Loan preparation
- Household budgeting
Common questions
Frequently asked questions
Which inputs should I use for Debt-to-Income Ratio?
Use monthly debt payments, gross monthly income, measured from the same source and period. Include only values that match the definitions shown beside each field.
Why might two Debt-to-Income Ratio calculations differ?
The systems or accounting policies may define monthly debt payments, gross monthly income differently. Compare the time period, scope, source, and treatment of exceptional items before comparing results.
How often should I recalculate Debt-to-Income Ratio?
Recalculate when any input changes materially and on the same reporting cadence used for the decision. Save the source and date of each input so the trend remains comparable.
Can I use Debt-to-Income Ratio by itself?
No single metric captures the full decision. Use the result with the related measures, assumptions, and limitations shown on this page.
Calculation reviewed: 2026-06-18. CalcPilot uses the formula shown above and tests representative values during the production build. See our methodology and correction policy.
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