Debt-to-Income Ratio Calculator

Use this free debt-to-income ratio calculator to estimate DTI from gross monthly income, existing monthly debts, and an optional proposed housing payment.

All tools

Formula steps Estimate limits shown Examples included Private history

Gross monthly income ($)Monthly debt payments ($)Proposed housing payment ($)

Debt-to-income ratio40%

$2,400 monthly debt / $6,000 income

Total monthly debt: $2,400.00
Existing debt payments: $900.00
Proposed housing payment: $1,500.00
Income after listed debts: $3,600.00

Lenders can count income and debts differently, so this is a planning ratio only.

Formula steps

Add existing monthly debt payments and proposed housing payment.
Divide that total by gross monthly income.
Convert the result to a percentage.

How to use the debt-to-income ratio calculator

Enter the requested dollar amounts, rates, terms, tax settings, or contribution details.
Use rates as percentages, such as 6.5 for 6.5%, and check whether a field asks for a monthly or annual amount.
Press the calculate button to see the answer, supporting metrics, and formula steps.
Use the result as a planning estimate only, then copy it if the assumptions look right.

Common uses

Estimate DTI before a loan or mortgage conversation.

See how a proposed housing payment changes the ratio.

Compare debt payments against gross monthly income.

Check a simple affordability signal before using lender tools.

Examples

Mortgage check $6,000 income, $900 debts, $1,500 proposed housing

40% DTI

Debt only $4,800 income and $650 debts

Debt-only DTI

Higher payment $8,000 income, $1,200 debts, $2,300 housing

DTI with housing

Frequently asked questions

Plain-language answers about when to use the estimate, what your numbers mean, what is left out, and how privacy works.

When should I use the Debt-to-Income Ratio Calculator?

Use it for early planning and side-by-side comparisons, especially for tasks like these: Estimate DTI before a loan or mortgage conversation. See how a proposed housing payment changes the ratio. Treat the answer as a planning estimate, not a final quote.

What is the Debt-to-Income Ratio Calculator doing with my numbers?

In plain language: The calculator adds existing monthly debt payments and proposed housing payment, divides by gross monthly income, then converts the result to a percentage. If the result seems too high or too low, first check whether each field expects a monthly amount, annual amount, dollar value, or percent.

What does this estimate leave out?

This is a simplified planning ratio. Lenders may count debts, income, housing costs, and qualifying rules differently. Real finance decisions can also depend on fees, timing, local rules, credit details, and provider-specific terms.

Does the site save my finance inputs?

No. The calculator runs in your browser tab. Recent answers stay only on the page while you use it, and they are not sent to a server.