Guides
Conversion guides that explain the context
Short, practical explainers: TV sizes, luggage limits, fuel economy, storage, tyre pressure and more. Each one links to the converter it explains.
BMI: What It Measures and When It LiesThe BMI formula, correct units, category thresholds, and the well-documented cases where BMI misleads — athletes, elderly, and ethnic differences.Celsius to Fahrenheit: the Honest GuideThe exact °C to °F formula, the 2x+30 travel trick, oven conversions and why weather and cooking need different precision.How to Convert a PDF to Word (Without Losing Formatting)Which PDFs convert to Word cleanly, which never do, free methods that work, and how to fix broken tables after conversion.Cups to Grams: Why Baking Needs a ScaleThe cups to grams problem: why flour volumes lie, the ingredient density table that saves recipes, and when a cup conversion is safe.GB, MB and Why Your 1 TB Drive Shows 931 GBBinary vs decimal bytes explained: the 1024 story, why drives show less than advertised, and honest storage planning.Inches to Centimetres: Sizes That Actually MatterThe 2.54 factor applied to real life: TV sizes, laptops, clothing, piping and height — with the reference table people actually need.Kg to Pounds (and Back) Without a CalculatorThe exact kg to lbs factor (2.2046), the gym trick, luggage limits, medical rounding and why US scales differ from UK ones.Kilometres to Miles: the Runner's GuideKm to miles for runners and travellers: race distances, the Fibonacci trick, the 8-5 rule, and speed limit conversions.MPG vs L/100km: Reading Fuel Like a LocalWhy US mpg and L/100km run in opposite directions, the UK vs US gallon trap, and the conversion table for car shopping across borders.PSI to Bar: Tyres, Pumps and Pressure GaugesPSI to bar conversions for tyres, bikes and compressors: the 14.5 rule, the 2x shortcut, and reading gauges across Europe and the US.