Nine free calculators for what your money does over time â compound growth, mortgage overpayments, loan interest, fund fees and debt payoff. All calculations run locally in your browser, with no sign-up.
Which one do I need?
Common questions
How is compound interest calculated?
Each period's interest is added to the balance before the next period is worked out, so growth compounds: A = P(1 + r/n)^(nt). The calculator shows the year-by-year breakdown so you can see it building.
Is CAGR the same as average annual return?
No. A simple average ignores compounding and overstates growth after volatile years; CAGR is the single smoothed rate that takes the start value to the end value.
Do these account for UK tax?
They work in gross figures. For VAT or income-tax bands use the Tax / VAT calculator.