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Debt-to-Income (DTI) Ratio Calculator — Free Online Calculator & Guide

Calculate your front-end and back-end debt-to-income ratios to see if you qualify for a mortgage. Lenders typically require a DTI below 43%.

✓ Formula verified: January 2026For informational purposes only

Debt-to-Income (DTI) Ratio Calculat

Results below

Enter Values

Monthly Income

$
$
$

Monthly Debt Payments

$
$
$
$
$
$
Back-End DTI — Yellow — Good
35.3%

Front-End DTI (Housing Only) — Green — Excellent

24.0%

Total Gross Monthly Income

$7,500.00

Total Monthly Debt

$2,650.00

Max Housing for 28% Front-End

$2,100.00/mo

Max Total Debt for 36% Back-End

$2,700.00/mo

Max Total Debt for 43% (FHA limit)

$3,225.00/mo

Remaining Capacity (vs. 43% limit)

$575.00/mo available

What if your gross monthly salary changes? $6300 → 39.0% · $7000 → 35.3% · $7700 → 32.3%

Scenario Comparison

Conservative (5%)
$16,470.09
$6,470.09 interest
Your scenario (7%)
$20,096.61
$10,096.61 interest
Aggressive (10%)
$27,070.41
$17,070.41 interest
High-risk (14%)
$40,224.71
$30,224.71 interest
Best return
Share your result
DTI Visual Gauge
Back-End DTI (All Debts)35.3%
Excellent

Excellent. Well within conventional loan limits.

Front-End DTI (Housing Only)24.0%
Excellent

Excellent. Conventional lenders prefer front-end under 28%.

Lender DTI Thresholds

28% Front-end (Conv.)
36% Back-end (Conv.)
43% Back-end max (most)
50% Back-end (FHA max)

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