CalcNimbus
Blog
Blog
Mortgage Taxes Investing Health Math Home All categories Blog
Category

Mortgage & Loans

Free mortgage and loan calculators: monthly payment, payoff, refinance, auto and personal loans, credit card payoff, debt consolidation and DTI — with formulas and examples.

20 calculators Free and online

📌 About Mortgage & Loans

Borrowing money is one of the biggest financial decisions you'll make, and small differences in rate, term or extra payments add up to thousands of dollars. This category brings together the calculators that show you the real cost: your monthly payment, how fast you can be debt-free, and whether refinancing or consolidating actually saves you money.

Every calculator shows the formula, a worked example in US dollars, and the mistakes people make most — like shopping by monthly payment instead of total interest. Use them to plan a home purchase, compare loan offers, or build a payoff strategy.

  • Estimate your full PITI mortgage payment, including taxes, insurance and PMI
  • See how extra payments shorten your loan and cut total interest
  • Find the break-even point on a refinance before you commit
  • Compare auto and personal loan offers by total cost, not just the payment
  • Build a credit-card or debt-consolidation payoff plan
  • Check your debt-to-income ratio the way lenders do

🧮 Calculators in this category

Mortgages

Home Affordability Calculator — How Much House Can I Afford?
Find out how much house you can afford using the lender-standard 28/36 rule — your maximum home price, monthly payment, and loan amount based on your income, debts and down payment.
→
Mortgage Payment Calculator — Monthly P&I, Taxes, Insurance & PMI
Estimate your full monthly house payment — principal, interest, property taxes, homeowners insurance, HOA dues and PMI — plus your loan amount and lifetime interest.
→
Closing Costs Calculator — Estimate Fees & Total Cash to Close
Estimate the closing costs on your home purchase — origination, appraisal, title, recording and prepaid escrows — then see your true cash to close: down payment plus fees.
→
Mortgage Points Calculator — Cost, Break-Even & Lifetime Savings
See whether paying mortgage discount points pays off — the upfront cost, your lower monthly payment, the monthly savings, your break-even point in months, and the total savings if you keep the loan to term.
→
VA Loan Calculator — Funding Fee, Loan Amount & Monthly Payment
Estimate a VA home loan with $0 down: your VA funding fee, the total loan amount once the fee is financed, and your monthly principal-and-interest payment — with no PMI ever.
→
Mortgage Recast Calculator — New Payment & Interest Saved After a Lump Sum
Drop a lump sum on your principal and see your re-amortized monthly payment — same rate, same remaining term, a lower payment and less interest, without refinancing.
→

Debt & Credit Cards

Credit Card Payoff Calculator — Months, Interest & Total Paid
See how long it takes to pay off a credit card, how much interest you'll pay, and the monthly payment needed to hit a target payoff date.
→

Home Buying

Down Payment Calculator — Home Price, Loan Amount & PMI Check
Enter a home price and a down payment (as a % or a $ amount) to see your cash to put down, the loan you'll need, and whether PMI is likely.
→
Rent vs Buy Calculator — Should You Rent or Buy a Home?
Compare the real cost of renting vs buying over the years you'll stay — mortgage, taxes, maintenance, equity, appreciation and the break-even year.
→

Student Loans

Student Loan Calculator — Monthly Payment, Total Interest & Payoff
Estimate your monthly student loan payment, the total interest you'll pay, and how much faster you'd be debt-free by adding a little extra each month.
→

Loan Costs

APR Calculator — True Annual Cost of a Loan With Fees & Points
Find the real yearly cost of a loan once fees and points are baked in — APR vs nominal rate, monthly payment and total cost in one place.
→

Debt & Credit

Debt Consolidation Calculator — Combine Debts & See Your Monthly Savings
Roll your credit cards and loans into one fixed payment, then compare your current total interest and payoff time against a new consolidation loan.
→

Debt Payoff

Debt Snowball Calculator — Payoff Order, Months & Interest Saved
Order your debts smallest-balance first, roll each paid-off payment into the next, and see your debt-free date, total months, and total interest — plus how the avalanche method compares.
→

Mortgage Qualification

Debt-to-Income (DTI) Calculator — Front-End & Back-End Ratio
Find your DTI ratio fast: enter gross monthly income and your monthly debts to get front-end and back-end DTI, with lender qualification guidance.
→

Mortgage

FHA Loan Calculator — Monthly Payment, UFMIP & MIP
Estimate an FHA mortgage payment: base loan, 1.75% upfront MIP, monthly mortgage insurance, principal & interest, and your total monthly cost.
→
Mortgage Payoff Calculator — Extra Payments, Time & Interest Saved
See how adding extra to each monthly payment shortens your mortgage, moves up your payoff date, and slashes total interest.
→
Mortgage Refinance Calculator — New Payment, Savings & Break-Even
See if refinancing pays: new monthly payment, monthly savings, break-even month, and how much interest you save (or add) over the life of the loan.
→

Home Equity

HELOC Calculator — Home Equity Line of Credit Limit & Payment
Estimate your home equity, the maximum HELOC line you can borrow at your lender's CLTV limit, your interest-only payment during the draw period, and the principal-and-interest payment once repayment begins.
→
Home Equity Loan Calculator — Max Loan, Payment & Total Interest
Borrow a one-time lump sum against your home and repay it in equal, fixed monthly payments over a set term. See your max loan at your lender's LTV limit, the fixed payment, and total interest.
→

Personal Loans

Personal Loan Calculator — Monthly Payment, Interest & APR
Estimate your monthly payment, total interest, and real APR on a personal loan from the amount, rate, term, and origination fee.
→

📝 Related articles

Read more about this topic on our blog.

Mortgage Recast vs Refinance: Which Lowers Your Payment?
A recast re-amortizes your loan at the same rate after a lump sum; a refinance replaces it with a new loan and rate. Here's a side-by-side example and when each one wins.
→
15-Year vs 30-Year Mortgage: Which Saves More?
A 15-year mortgage can save over $200k in interest, but the higher payment isn't for everyone. See a worked $300k example and the smart middle-ground strategy.
→
Debt-to-Income Ratio: What Lenders Want and How to Improve It
Your debt-to-income ratio is one of the first numbers a lender checks. Here's how front-end and back-end DTI work, the 28/36 and 43% benchmarks, and how to lower yours fast.
→
FHA vs Conventional vs VA Loan: Which Fits?
FHA, conventional, and VA loans each suit a different buyer. Compare down payments, mortgage insurance, credit-score rules, and who qualifies to find your fit.
→

❓ Frequently asked questions

How do I calculate a monthly loan payment?

Use the amortization formula M = P·r·(1+r)^n / ((1+r)^n − 1), where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12 ÷ 100), and n is the number of monthly payments. Our calculators do this for you.

Is it better to pay extra or refinance?

If your rate is already competitive, making extra principal payments saves interest with no closing costs. If you can drop your rate by roughly 0.5% or more, refinancing may save more — check the break-even point first.

What debt-to-income ratio do lenders want?

Most mortgage lenders look for a back-end DTI of 43% or lower, and many prefer 36%. Lower is better and improves the rate you're offered.