Money & Finance
Mortgages, loans, interest, salary and long-term planning maths, worked out in seconds.
Free money & finance calculators from CalculatorWonder. Every tool below runs instantly in your browser, states the formula and assumptions behind the answer, and never stores what you type.
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US Mortgage Calculator
Estimate the monthly repayment on a US home loan from the amount, rate and term, and see how an extra monthly payment shortens it.
Enter what you plan to borrow, the annual interest rate your lender quoted and how many years you want to repay over. CalculatorWonder applies the standard amortised repayment formula and shows the monthly figure alongside the total you will have paid back by the final instalment. You can also add an extra monthly overpayment to see how much sooner the loan would be paid off. This is the US version; versions for other countries are coming soon.
A mortgage is almost always the largest single debt a household takes on, so understanding the monthly repayment before you sign matters. The US Mortgage Calculator turns three numbers — the amount you want to borrow, the annual interest rate your lender quoted, and the repayment term in years — into a clear monthly figure using the standard amortised repayment formula. It also shows the total interest you will pay over the life of the loan, which is often a sobering but useful number to compare against different terms. This is the US version; versions for other countries are coming soon.
Loan Calculator
Work out repayments and total interest on any fixed-rate personal loan.
A general purpose repayment tool for car finance, personal loans, refurbishment credit or anything else with a fixed rate and fixed term. You get the periodic payment, the total interest cost and the full amount repaid.
The Loan Calculator is a general-purpose repayment tool for any fixed-rate, fixed-term borrowing — car finance, a personal loan, refurbishment credit, or a consolidation loan. Enter the amount you are borrowing, the annual interest rate, and how long you have to repay, and it returns the regular payment, the total interest cost, and the full amount you will have repaid by the end.
Compound Interest Calculator
See how savings grow when interest earns interest, with optional monthly deposits.
Compounding is the reason a modest monthly habit turns into a meaningful balance. Set your starting amount, expected annual return, the number of years and how often interest is added, then add a monthly contribution to see the difference it makes.
Compound interest is the mechanism by which the interest you earn starts earning interest of its own. Over years and decades it is the single biggest reason that regular, modest saving turns into a meaningful balance. The Compound Interest Calculator lets you set a starting amount, an expected annual return, the number of years, and how often interest is added, then optionally layer in a fixed monthly contribution to see the difference consistent saving makes.
Salary Calculator
Convert an annual salary into hourly, weekly and monthly pay, before and after US tax.
Enter your gross annual salary, your usual working pattern and your filing status. CalculatorWonder applies the 2024 US federal income tax brackets, the standard deduction and FICA (Social Security and Medicare) to estimate your take-home pay per hour, week, month and year. You can also add an average state and local income tax rate. This is the US version; versions for other countries are coming soon.
A salary offer quoted as a yearly figure is hard to compare with a job that pays by the hour, and even harder to map onto a monthly budget. The Salary Calculator converts a gross annual salary into hourly, weekly, monthly and yearly pay, then applies US tax to estimate what you actually take home. Enter your gross salary, your usual working pattern, and your filing status, and the tool does the rest.
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