Ten loan and finance calculators that show the full month-by-month amortization schedule, not just a monthly payment, plus a rate page dated to the week Freddie Mac and the Federal Reserve published it. Punch in your numbers and see what a loan actually costs before you sign anything.
Payments, interest, and the honest truth about that "low monthly rate."
Monthly payment, total interest and payoff for any loan.
Open calculator →Car payments including down payment, trade-in and sales tax.
Open calculator →Full monthly payment with taxes, insurance and PMI.
Open calculator →Growth of savings with regular contributions over time.
Open calculator →Purchasing power between any two years using CPI data.
Open calculator →Payment and total interest on unsecured installment loans.
Open calculator →Monthly savings and the break-even month on a refi.
Open calculator →The real rate you pay once lender fees are counted in.
Open calculator →Months and interest to clear a balance, with extra payments.
Open calculator →Money factor, residual and depreciation turned into a payment.
Open calculator →Every tool runs the standard formula lenders use, the same amortization math behind a Loan Estimate, so the payment and total interest you see here match what shows up in your paperwork. Enter the numbers once and the calculator does the rest in your browser. Nothing you type is stored or sent anywhere.
Most calculators stop at a monthly number. The loan and mortgage calculators here show how much of each payment is interest versus principal, month by month, which is what actually explains why refinancing early saves more than refinancing late.
The average loan rates page lists this week's Freddie Mac mortgage survey and the latest Federal Reserve G.19 release, each with its observation date, rather than a rate that was accurate whenever the page happened to get written.
Guides like how amortization works and APR versus interest rate show the arithmetic by hand, so you can check a lender's quote against the math yourself instead of taking either of our word for it.
Every loan tool here runs the same published amortization formula lenders use: the monthly payment equals the amount borrowed times the monthly rate, divided by 1 minus (1 plus that rate) raised to the negative number of payments. That single line of algebra is the whole engine. It is why the loan, mortgage, auto, personal and refinance calculators agree with each other, and why their answers line up with the Loan Estimate a lender is required to give you.
Rate and APR are different numbers, and the tools keep them apart on purpose. The interest rate prices the borrowing itself, while APR folds lender fees into that rate so two offers can be compared honestly. That is the distinction the Consumer Financial Protection Bureau draws, and the APR calculator solves for the combined figure the same way a Truth in Lending disclosure does.
Assumptions are deliberately plain and stated where they apply. Payments are principal and interest unless a tool says otherwise, rates are treated as fixed for the term, interest compounds monthly, and the inflation tool uses CPI-U annual averages rather than monthly readings. Rate figures quoted around the site carry observation dates from the Freddie Mac Primary Mortgage Market Survey and the Federal Reserve's G.19 consumer credit release, not from whenever a page happened to be written. And nothing you type is sent anywhere; the math runs in your browser and stays there.
The general-purpose one. Give it an amount, a rate and a term and it returns the payment, the total interest and a scrollable schedule of every installment; the default $25,000 at 7.5% over five years works out to $501 a month, with $5,057 of interest across the 60 payments. If you bookmark one page here, make it this one.
A house payment is more than the loan, so this tool adds property tax, homeowners insurance and PMI to the principal and interest. Its default $400,000 purchase with 20 percent down at 6.49% lands at $2,546 a month once $525 in monthly tax and insurance rides along. Put less than 20 percent down and it prices the PMI too.
Dealers quote payments after tax, so this one applies sales tax to the price net of your trade-in, the treatment most states use, before it amortizes anything. On the defaults, a $32,000 car with $4,000 down at 6 percent tax finances $29,920 and costs $585 a month at 6.5%. Set the tax field to your own state's rate first.
Tuned for unsecured installment loans, where the APR does nearly all the talking. The default $20,000 at 11.5% over 60 months runs $439.85 a month and $6,391 in interest, and the page walks through what an origination fee subtracts from the cash you actually receive.
One question, answered in months: how long until closing costs earn themselves back? The default swap from 6.8% to 5.5% saves $291 a month and breaks even in 13.8 months against $4,000 in costs. Sell or refinance again before the break-even and the deal lost you money.
Fees change the real price of a loan, and this tool measures by how much. Borrow $15,000 at a quoted 8.5% with a $300 origination fee and the effective APR comes out at 9.56%. That is the number to compare across offers, not the sticker rate.
Point it at a revolving balance and it steps through the payoff month by month, the way your statement will. An $8,000 card balance at 19.9% with $250 payments takes 3 years and 10 months to clear and costs $3,498 in interest. Add an extra monthly amount and watch both figures shrink.
The one tool here that works for you instead of the lender. $10,000 up front plus $300 a month at a 7 percent annual return compounds to $196,665 over 20 years, and $114,665 of that is growth rather than contributions. Compounding frequency is switchable, monthly through annually.
Converts a dollar amount between any two years back to 1913 using CPI-U annual averages. $1,000 from 1990 needs to be about $2,400 in 2024 to buy the same basket, a drift of roughly 140 percent. Useful for old salaries, old house prices and settling family arguments.
Turns lease jargon back into English: the money factor times 2,400 is just an interest rate. On the default $35,000 car with a $21,000 residual over 36 months, the payment splits into $333 of depreciation and $113 of finance charge, $477 a month once 7 percent tax is applied. Seeing that split is what makes the residual worth negotiating.
LoanCalcTools is owned and operated by Chris Terry as part of the Encore Editorial network. He builds and checks the calculators; Jessica Martinez, a former bank credit analyst, writes the guides, and every formula gets verified against a second worked example before a page ships. The full process, sources included, is on the editorial standards page, and the authors page says who checks what. Spot a number that looks wrong? The contact form goes straight to Chris.