Guides to Measurement
Clear explanations of the units we use every day — where they came from, where people get caught out, and how to convert them with confidence.
US vs UK Measurements: Why a Pint Isn’t Always a Pint
Pints, gallons, fluid ounces, tons and stones compared side by side — why American customary and British imperial units share names but not sizes.
Read articleCelsius vs Fahrenheit: Where the Scales Came From and How to Think in Both
The origins of the Fahrenheit and Celsius scales, why they meet at −40, how Kelvin fits in, and practical ways to get a feel for temperatures in either system.
Read articleMetric Prefixes Explained: From Nano to Giga With Everyday Examples
What kilo, milli, micro, mega, giga and the other SI prefixes mean, how to tell M from m, why a terabyte drive shows less space than expected, and the newest prefixes added in 2022.
Read articleHow to Read Nutrition Labels: Grams, Ounces, Calories and Serving Sizes
A practical guide to the measurements on food labels — serving sizes, net weight, calories vs kilojoules, % Daily Value, sodium vs salt, and the rounding rules that hide small amounts.
Read articleMeasurements for Travelers: Luggage, Liquids, Speed Limits and Fuel Abroad
The unit conversions that matter most on a trip — baggage allowances in kg and lb, the 100 mL liquids rule, km/h speed limits, fuel prices per litre, hotel room sizes and fever temperatures.
Read articleHeight, Weight and BMI Across Unit Systems
Convert height between feet-and-inches and centimetres, body weight between pounds, stones and kilograms, and calculate BMI correctly in either metric or imperial units.
Read articleThe Ounce Explained
Avoirdupois, troy, fluid and apothecary ounces — four units sharing one name.
Read articleConverting Recipes Without the Guesswork
Cups, grams, spoons and oven temperatures for cooks working across countries.
Read articleA History of Weights and Measures
From the Egyptian cubit to the 2019 redefinition of the kilogram.
Read articleHave a measurement question we haven’t covered? Suggest a topic.