Metric vs Imperial: A Plain-English Guide to Both Systems
Why the world uses two measurement systems, how they differ, and the handful of conversion anchors that make switching between them easy.
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Plain-English explanations of units, systems and conversions: how they work, where they came from and how to avoid common mistakes.
Cooking Measurement Conversions: A Cheat Sheet for Cups, Spoons and Grams
Convert cups, tablespoons, teaspoons, milliliters, grams and oven temperatures with confidence, whichever country your recipe comes from.
Read guideCelsius vs Fahrenheit: How to Convert Temperatures in Your Head
A quick history of the two scales, the exact formulas, and simple mental tricks to estimate temperatures without a calculator.
Read guideWhy Your 1 TB Drive Shows 931 GB: Bits, Bytes and Storage Units Explained
Decimal versus binary storage units, bits versus bytes, and why internet speeds and file sizes never seem to match.
Read guideHow to Convert Clothing and Shoe Sizes Between the US, UK and EU
Shoes, dresses, jackets and bras are sized differently in each region. Learn the simple rules and the pitfalls before you order from abroad.
Read guide7 Common Unit Conversion Mistakes (and How to Avoid Them)
Squared units, US versus imperial gallons, ton versus tonne and other traps that cause wrong answers, plus quick checks to catch them.
Read guideMental Math Tricks for Converting Units Without a Calculator
Simple rules of thumb for miles, kilometers, pounds, kilograms, liters, gallons and temperatures that get you within a few percent in seconds.
Read guideTire Pressure Explained: PSI, Bar and kPa
What the numbers on your tire and door placard mean, how to convert between psi, bar and kPa, and why the right pressure matters.
Read guideCalories vs Kilojoules: How to Read Food Labels Around the World
Why labels show Calories, kcal or kJ, how to convert between them, and how much energy you actually need each day.
Read guideAcres, Hectares and Square Feet: A Guide to Land and Property Measurements
How land and floor space are measured around the world, with conversion tables and tips for comparing listings.
Read guideMbps vs MB/s: Why Your Download Speed Is Not Your Internet Speed
Understand megabits and megabytes, what speeds you need for streaming, gaming and backups, and how to estimate download times.
Read guideMPG to L/100 km: How to Compare Fuel Economy Across Countries
Miles per gallon and liters per 100 kilometers work in opposite directions. Learn the formula, the US vs UK gallon trap, and a quick conversion chart.
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