Loan Calculators & Tools 2026

Borrowing decisions usually come down to two numbers a lender already knows: the monthly payment you can carry and the total interest you will pay for the privilege. The debt-to-income calculator assembles both sides of the ratio lenders use to qualify mortgages, auto loans and personal loans — minimum debt payments against gross monthly income — so you can see your DTI before an application does. It is the fastest way to find out whether a new payment fits, or whether paying something off first moves you into a better tier.

For debt that already exists, strategy matters more than arithmetic. The debt-payoff calculator runs the avalanche method (highest interest rate first) and the snowball method (smallest balance first) across all of your balances and reports the debt-free date and interest total for each, so the trade-off between mathematical efficiency and visible progress is a choice you make with numbers instead of guesswork. The auto-loan and student-loan calculators handle single obligations in detail: amortization schedules, the effect of a larger down payment, and how extra payments shorten a term.

When you are choosing between offers, the lowest monthly payment is not the cheapest loan — a longer term can hide a higher rate. The loan-comparison calculator puts two offers side by side on payment, total interest, total cost and payoff date using the same inputs, which is the comparison most borrowers skip. All calculators run in your browser with editable, conservative defaults, and they return estimates for planning and education only: your actual approval, rate and terms depend on the lender's underwriting, your credit profile and the fine print of the specific offer.