Similar Tools Compared
These tools look alike — but answer completely different questions. Here's exactly when to use each one.
Mortgage Calculator vs. Affordability Calculator
Both involve mortgages — but they answer opposite questions.
You already know the home price and want to see the real monthly payment — broken down into principal, interest, taxes, insurance, HOA, and PMI.
- You're comparing two specific listings
- You want a full amortization schedule
- You know the price — you just need the numbers
You know your income and debts and want the maximum home price you can responsibly borrow. Applies the lender 28/36 debt-to-income rule.
- You're early in your search, setting a budget
- You want to know what a lender will approve
- You need a realistic price range before browsing
Extra Payment vs. Biweekly vs. Loan Payoff
All three help you pay off faster — but from different angles.
Shows how adding extra dollars each month (or a lump sum) reduces your loan term and total interest paid.
"If I pay an extra $200/mo, how many years do I save?"
Paying half your mortgage every two weeks = 26 half-payments = 13 full payments per year. One free extra payment, zero budget change.
Saves ~4–5 years on a 30-year mortgage.
Works backwards — set a target payoff date and it tells you the exact monthly payment required to hit that goal.
"What payment clears this loan by 2035?"
Refinance Calculator vs. HELOC Calculator
Both use your home equity — but in completely different ways.
Replace your existing mortgage with a new one at a lower rate. Shows monthly savings and the break-even point on closing costs.
- Rates have dropped since you bought
- You want a lower monthly payment
- You want to shorten or extend your loan term
A Home Equity Line of Credit — a revolving credit line secured by your home, like a low-rate credit card you draw on as needed.
- You need cash for renovations or emergencies
- You want to keep your current low mortgage rate
- You need flexible access to funds over time
ARM vs. Fixed vs. Mortgage Points
Three rate-related decisions every buyer faces at closing.
Fixed rate never changes. ARM starts low but adjusts after an initial period (e.g., 5/1 ARM adjusts in year 5). Shows the crossover point.
ARMs save money if you sell or refi before adjustment hits.
Pay upfront points (1% of loan each) to buy down your rate. Shows break-even and lifetime savings.
Worth it only if you stay past break-even (often 5–7 years).
Shows how a 0.25%, 0.5%, or 1% rate difference changes your monthly payment and total interest over the loan life.
A 1% difference on a $400K loan ≈ $240/month.
Down Payment Calculator vs. Closing Costs Calculator
Both are upfront cash you'll need — but separate buckets.
Compare 3%, 5%, 10%, and 20% down side-by-side. Shows how each affects your payment, PMI cost, and total interest paid.
Estimates lender fees, title, appraisal, and prepaid items due at closing — entirely separate from your down payment.