By the NumbersBy the Numbers: Ofgem's Next Price Cap Update (27 May 2026) — What a 10% Change Would MeanOfgem will publish the next default tariff price cap by 27 May 2026. We model simple +10% and -10% bill scenarios and show how to run your own usage-based estimate.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 latestBy the NumbersBy the Numbers: Ofgem's Next Price Cap Update (27 May 2026) — What a 10% Change Would MeanOfgem will publish the next default tariff price cap by 27 May 2026. We model simple +10% and -10% bill scenarios and show how to run your own usage-based estimate.
By the NumbersBy the Numbers: What $4.50 Gas Means for Your Driving CostsEIA data puts regular gasoline at $4.500 per gallon. We run simple commute and annual-driving examples to translate per-gallon prices into a practical weekly and yearly spend.
Savings habitsHow to Calculate Compound InterestA plain-English guide to how money grows when interest earns interest, with a worked example and a companion calculator for your own savings plan.
Home buyingHow to Calculate Mortgage RepaymentsA homeowner-friendly walkthrough of monthly mortgage repayments, why rates and terms matter, and how to test scenarios before you speak to a lender.
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.
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.