Most free loan calculators hand you a single number and hide the maths. CalcHub does the opposite: it runs nine calculators in your browser and prints the formula it used next to every result, so you can see exactly which assumption produced which figure. Nothing you type is uploaded, and there is no sign-up wall — which matters a great deal when the numbers involved are your salary and your mortgage.
CalcHub is a single-page suite of nine financial calculators covering the questions people actually ask before signing something: what will my monthly payment be, what is this credit card really costing me, how long until the balance is gone, and can I afford this at all. Rather than spreading those across five bookmarked sites with different interfaces, they sit in one page and share the same input conventions.
The design leans towards transparency. Each result is accompanied by the formula that produced it and the assumptions behind it — compounding frequency, whether tax and insurance are included, how APR is derived from the nominal rate. That is a meaningful difference from the black-box widgets embedded on many lender and comparison sites.
It is free, requires no account, and runs entirely client-side. You can open it, type in a salary figure, and close the tab knowing that number never left your device.
| Calculator | What it answers |
|---|---|
| Mortgage Calculator | Monthly principal-and-interest payment from loan amount, term and rate, with a full amortisation breakdown. |
| APR Calculator | Converts a nominal rate into a true annual percentage rate including fees, so two offers can be compared. |
| Credit Card Payoff | How long a balance takes to clear at a given monthly payment, and the total interest paid along the way. |
| Loan Calculator | Generic amortising loan: personal, auto or student, with total interest and payment schedule. |
| Currency Converter | Live mid-market rates with daily refresh, useful for travel budgeting and cross-border invoices. |
| Loan Comparison | Puts two or more loan offers side by side and ranks them by total cost rather than headline rate. |
| Affordability | Works backwards from your income and existing obligations to a borrowing ceiling. |
| Prepayment | What an extra monthly amount does to your term and to total interest — usually more than people expect. |
| Combined View | Runs several scenarios together so you can see how changing one variable moves the rest. |
Pick a calculator from the top navigation, fill in the fields, and read the result together with the formula printed underneath. Change one input at a time — raise the down payment, shorten the term, add a monthly prepayment — and watch how the output moves. That comparison loop is where the tool earns its keep.
Two calculators can disagree by hundreds of dollars a month and both be arithmetically correct, simply because one compounds monthly and the other semi-annually, or because one folds insurance into the payment. If you cannot see the assumptions, you cannot tell which is right for you. CalcHub prints them, which turns an opaque number into something you can check against your lender's own disclosure.
All nine calculators are free with no registration, no email gate and no cap on how many scenarios you run. There is no premium tier and no export paywall — the results are on screen and you can copy them anywhere.
The mortgage figure covers principal and interest only. Real monthly outlay usually adds property tax, home insurance, and private mortgage insurance when the down payment is below 20% — so your lender's number will very likely be higher. The currency converter uses mid-market reference rates, which is not the rate a bank or card network gives you; expect a margin of roughly one to three percent at the point of exchange.
First-time buyers trying to understand what a rate change actually does to a monthly payment; anyone carrying a credit card balance who wants to see the real cost of paying only the minimum; people comparing two loan offers that quote different headline numbers; and travellers or freelancers who need a quick mid-market currency reference without signing up for anything.
Open CalcHub → See all finance toolsEach calculator maps to a question people actually search for. Pick the line that matches yours.
| What will my monthly mortgage payment be? | Mortgage Calculator |
|---|---|
| How much house can I afford on my income? | Affordability Calculator |
| What does this loan really cost per year including fees? | APR Calculator |
| How long until my credit card is paid off? | Credit Card Payoff |
| Should I pay extra each month, and how much does it save? | Prepayment Calculator |
| Which of two loans costs less in total interest? | Loan Comparison |
| What is my money worth in another currency today? | Currency Converter |
| How does a shorter term change total interest? | Mortgage Calculator (term) |
Yes. All nine calculators are free, with no registration, no email capture and no daily-use cap. You can run as many scenarios as you like.
No. Every calculation happens in your browser. Loan amounts, interest rates and balances stay in the page and are discarded when you close the tab — nothing is sent to a server.
Rates come from a public exchange-rate API and refresh daily. They are mid-market reference rates, not the rate your bank or card issuer will give you, which usually includes a margin.
The calculator covers principal and interest. Real payments usually also include property tax, home insurance, and mortgage insurance if your down payment is under 20%. Add those separately to match your lender's figure.
The interest rate is what you are charged on the balance. APR also folds in certain fees and expresses the total yearly cost as a single percentage, which makes different offers easier to compare. The APR tool shows how the two diverge.
No. CalcHub is an educational calculation tool. It shows you what the arithmetic produces under the assumptions you enter; it does not tell you what to borrow, what to buy, or which product to choose. Check any decision against your lender's official disclosure.
Open the Affordability Calculator and enter your annual income, expected down payment, interest rate and term. It works backwards from a monthly payment you can comfortably sustain to the loan size that implies. Bear in mind the result covers principal and interest only — add property tax, home insurance and any association fee to reach the real monthly figure.
Enter your balance, APR and minimum payment into the Credit Card Payoff calculator. It returns the number of months and the total interest you would pay along the way. Most people find the figure sobering — switching to a fixed higher monthly payment usually cuts both dramatically, and the tool lays the two side by side.
Run both scenarios in the Prepayment Calculator: it shows how much interest a recurring extra payment saves and how many months it removes from the term. Compare that guaranteed saving against what the same money might earn elsewhere. The tool does the arithmetic; the decision rests on your rate, your tax position and your appetite for risk.
Change the term in the Mortgage Calculator and compare the two. The 15-year loan carries a higher monthly payment but a far lower total interest bill; the 30-year frees up monthly cash flow for everything else. The tool shows both the payment and the lifetime interest, so you can judge which trade-off fits your situation.
Open the Currency Converter and enter the amount. It uses rates refreshed daily from a public source and shows the mid-market reference rate — the rate banks use among themselves. Your bank or card issuer will normally apply a margin on top, so treat the result as a benchmark rather than the price you will actually be given.
Yes. The layout adapts to mobile browsers, so you can run a mortgage or payoff scenario on a phone. Because nothing is uploaded, the calculators also keep working on a slow or metered connection once the page has loaded.