Debt-to-Income Ratio Calculator
Add your entered monthly debt payments and divide their sum by gross monthly income to calculate the debt-to-income ratio percentage. See each payment and the sum used in the calculation.
Arithmetic on entered numbers only. The result describes the numbers you enter.
Free to use, with no sign up. Calculations run in your browser; entries are not uploaded.
Result
Formula: sum = monthlyDebts[1] + monthlyDebts[2] + …; ratio percent = monthly debt payments ÷ gross monthly income × 100. Payment amounts are added in exact integer cents. The percentage rounds half up to two decimal places.
Primary source: Consumer Financial Protection Bureau: debt-to-income ratio definition. This calculator uses the payment sum and gross monthly income in that definition.
Worked example: Monthly payments of $1,000, $250 and $150 sum to $1,400. With $5,000 gross monthly income, ratio percent = 1,400 ÷ 5,000 × 100 = 28.00%. A second example: $300 + $200 = $500; $500 ÷ $2,000 × 100 = 25.00%.
Input bounds: 0–100 monthly payments; each payment and their sum must be $0–$100,000,000; gross monthly income $0.01–$100,000,000. Money accepts at most two decimal places. Empty lines inside a payment list are invalid. The ratio has no comparison bands or classification.
How to use this tool
Enter one monthly debt payment in USD per line and your gross monthly income before deductions. Select Calculate to show the sum and ratio percentage. Leave the debt list empty for zero payments.
Frequently asked questions
How is debt-to-income ratio calculated?
Add the entered monthly debt payments, divide the sum by gross monthly income and multiply by 100. The result is a percentage rounded to two decimal places, with exact halfway cases rounded upward.
What goes in the payment list?
Enter monthly payment amounts, rather than outstanding debt balances, one per line. The calculator adds only the amounts you enter. All amounts must describe the same monthly period and use USD. It does not decide which payments belong in your list.
Can income or the payment sum be zero?
Gross monthly income must be positive because it is the divisor. An empty payment list or a list of zero payments gives a 0.00% ratio. Ratios above 100% are shown as ordinary arithmetic results.