By the NumbersBy the Numbers: How Long Could a 4.5-Mile Coastal Walk Take?A National Trust route is 7.2 km with a 3h30 estimate. Compare transparent walking-pace scenarios and learn what a simple travel-time calculation misses.Calcul8 blog
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Plain-English articles on money, homes, cars, small business, and useful maths. Each post explains the idea, shows where people trip up, and links to a calculator when you are ready to try your own numbers.
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By the Numbers: More Recycling, Lower Rate — The 2024 UK Waste Puzzle
Defra reports more household waste recycled in 2024, yet a lower recycling rate. Rebuild both percentages and see why the denominator matters.Latest articles
Browse calculatorsBy the NumbersBy the Numbers: How Long Could a 4.5-Mile Coastal Walk Take?A National Trust route is 7.2 km with a 3h30 estimate. Compare transparent walking-pace scenarios and learn what a simple travel-time calculation misses.
By the NumbersBy the Numbers: What Does a 2kW Heater Cost to Run?Use dated Ofgem electricity rates to price 30-minute, one-hour and two-hour full-power heater scenarios, with thermostat and tariff caveats.
By the NumbersBy the Numbers: Hurricane Polo’s 90-Knot Rise ExplainedA 90-knot rise in 24 hours was 150% of a 60-knot extreme-intensification threshold. See why that is not the storm’s percentage wind-speed increase.
By the NumbersBy the Numbers: UK Inflation (April 2026) — What 2.8% CPI Can Mean in PoundsONS reports CPI up 2.8% in the year to April 2026. We translate the percentage into pounds for simple household budget examples.
By the NumbersBy the Numbers: Ofgem Price Cap £1,641/year — Rebuild the Bill From Unit Rates and Standing ChargesOfgem’s April–June 2026 cap headline is £1,641/year for a typical household. We show how unit rates, standing charges, and kWh usage combine to form a bill.
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.
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.Browse by topic
By the Numbers
- By the Numbers: More Recycling, Lower Rate — The 2024 UK Waste Puzzle
- By the Numbers: How Long Could a 4.5-Mile Coastal Walk Take?
- By the Numbers: What Does a 2kW Heater Cost to Run?
- By the Numbers: Hurricane Polo’s 90-Knot Rise Explained
- By the Numbers: UK Inflation (April 2026) — What 2.8% CPI Can Mean in Pounds