💷 Finance

Finance Calculators

Free, accurate financial calculators built for UK users — mortgages, savings, loans, compound interest, ISAs and more. All figures in pounds sterling.

All Finance Calculators

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Mortgage Calculator
Calculate your monthly repayments, total interest, and loan-to-value ratio. Works for repayment and interest-only mortgages. Includes year-by-year amortisation table.
Most PopularRepaymentInterest Only
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Personal Loan Calculator
Monthly repayments, total interest, and cost of credit for personal loans. Compare different loan amounts, rates and terms side by side.
APRComparison
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Compound Interest Calculator
See how your savings grow with compound interest over time. Add regular monthly contributions and compare annual, monthly, and daily compounding frequencies.
SavingsGrowthInvestments
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ISA Calculator
Project your tax-free ISA growth over any term. Uses the 2024/25 annual ISA allowance of £20,000 and shows how much of your returns is tax-free interest.
Tax-Free£20,000 limit
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Savings Goal Calculator
Work out how much you need to save each month (or week) to reach a financial goal by a target date. Includes interest earned on your savings pot.
Goal SettingMonthly
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Inflation Calculator
See what a sum of money from any past year is worth in today's pounds — or how inflation will erode future purchasing power. Uses historical UK CPI data.
CPIReal Value
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Credit Card Payoff Calculator
Find out how long it will take to clear your credit card balance with minimum payments — and how much less you'd pay by increasing your monthly payment.
DebtInterest
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Pension Calculator
Project your retirement pot based on current contributions, employer match, and expected growth. See your estimated annual income in retirement in today's money.
RetirementEmployer Match

About Our Finance Calculators

All finance calculators on TheCalculatorSite.co.uk are built specifically for UK users. Every monetary figure is displayed in pounds sterling (£). Interest rate defaults reflect current UK market conditions, and ISA allowances, pension annual allowances, and other limits use 2024/25 HMRC figures.

Our most-used calculator is the mortgage calculator, which allows you to calculate monthly repayments for both repayment and interest-only mortgages, see the full year-by-year amortisation schedule, and understand your loan-to-value ratio. We also recommend pairing it with our stamp duty calculator for a complete picture of property purchase costs.

For savings and investments, our compound interest calculator is the best starting point — particularly if you want to understand the dramatic long-term difference that starting savings early can make. For ISA savers specifically, the ISA calculator shows the tax-free growth benefit clearly over 10, 20 and 30-year periods.

⚠️ All calculators provide illustrative figures only. They do not constitute financial advice. Always consult an FCA-regulated independent financial adviser before making significant investment or borrowing decisions.