Finance tools
Mortgage, loan, interest and percentage maths with full schedules.
Nothing is uploaded. This tool runs entirely inside your browser tab. Your files and figures stay on your device - we never receive them, so we cannot read, store or lose them.
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Mortgage calculator
Work out the full monthly cost of a home loan - principal, interest, tax, insurance and PMI - with a year-by-year amortisation schedule.
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Loan calculator
Find the monthly payment, total interest and full repayment schedule for any fixed-rate loan - car, personal, student or business.
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Compound interest calculator
See how savings and investments grow over time, with regular contributions and any compounding frequency, plus a year-by-year balance table.
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Percentage calculator
Work out a percentage of a number, express one number as a percentage of another, or find the percentage increase or decrease between two values.
Money maths you can check
Financial calculators are the ones people most often need to trust and least often get to verify. Every tool here shows its working: the formula it uses, the assumptions it makes, and a schedule you can read line by line rather than a single number you have to take on faith.
They also run entirely on your device. Your salary, your debts and your deposit are never transmitted, which matters more here than in any other category on this site.
Which calculator do you need?
- Buying a home - the mortgage calculator includes property tax, insurance and PMI, so the monthly figure is the one that will actually leave your account.
- Borrowing anything else - the loan calculator covers car, personal and student loans, and shows how much term length costs you.
- Saving or investing - the compound interest calculator handles regular contributions and any compounding frequency.
- Everyday percentages - the percentage calculator covers discounts, tax, tips and percentage change.
A note on accuracy
These calculators use standard published formulas and are accurate to the inputs you give them. What they cannot know is your credit profile, the fees a particular lender charges, or how rates will move. Treat every result as a well-informed estimate for comparing options - and get the real numbers from a lender's Loan Estimate before committing to anything.