Mortgage choicesMortgage Overpayment vs Offset MortgageA practical comparison of two ways to reduce mortgage interest: paying extra into the loan or linking savings through an offset account.Calcul8 blog archive
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Older practical guides from the Calcul8 blog, with the same plain-English explanations and calculator links for your own numbers.
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Back to latestMortgage choicesMortgage Overpayment vs Offset MortgageA practical comparison of two ways to reduce mortgage interest: paying extra into the loan or linking savings through an offset account.
Debt planningHow to Pay Off Credit Card Debt FasterA realistic look at credit card payoff timelines, minimum payments, and why a fixed extra payment can change the cost of debt.
Everyday mathsHow to Calculate Percentage IncreaseA simple guide to percentage increase, from bills and prices to business metrics, with the baseline mistake explained clearly.
Shopping mathsHow to Calculate a DiscountA shopper-friendly guide to sale prices, percentage-off offers, stacked discounts, and the difference between savings and final price.
Small businessHow to Calculate Profit MarginA small-business guide to gross profit margin, markup, pricing checks, and why discounts can quietly squeeze profitability.
Investing basicsHow to Calculate CAGRA calm explanation of CAGR, what it does and does not tell you, and how to compare long-term growth without overreading it.
Car financeHow to Calculate Car Loan PaymentsA car-buying guide to monthly finance payments, deposits, trade-ins, APR, and the hidden cost of stretching the term.
Running costsHow to Calculate Cost Per MileA practical way to see what each mile really costs once fuel, insurance, repairs, finance, depreciation, and mileage are counted together.
Deposits and LTVHow to Calculate Loan-to-ValueA clear home-buying guide to loan-to-value, deposit share, remortgage scenarios, and why lenders pay attention to the percentage.