Guides & explainers
The reasoning behind the tools. How percentages actually work, what a loan really costs, why BMI misleads, and how to pick a password that holds up. Written to answer the question, then get out of the way.
Home Why Your Baking Goes Wrong: Cups Aren't a Measurement
A cup of flour can weigh 120 g or 150 g depending purely on how it got into the cup. That 25% swing is why recipes fail. And why grams win.
Home How Much Paint Do I Actually Need?
The arithmetic takes thirty seconds, tin coverage figures are optimistic, and the second coat is not negotiable. A guide to buying paint once.
Money How to Actually Save For Something
Saving what's left at the end of the month means saving nothing. Work backwards from the goal, automate the transfer, and check the four honest levers.
Guides What You Actually Need On the Final Exam
The formula takes ten seconds, tells you where your effort is worth most, and is honest when a grade has become arithmetically out of reach.
Money How to Spot a Discount That Isn't One
Stacked discounts don't add up, 'up to 70% off' means almost nothing, and the bigger pack isn't always cheaper. The arithmetic behind retail pricing.
Money What Your Salary Actually Works Out To Per Hour
The 2,080-hour rule, why the hours you really work change the answer, and how to compare a contract rate to a salary without fooling yourself.
Guides How to Schedule Across Time Zones Without Getting It Wrong
Why the offset you memorised is wrong for three weeks a year, which abbreviations are genuinely ambiguous, and how to write a time nobody can misread.
Health Why 6 Hours of Sleep Can Beat 7
Sleep runs in roughly 90-minute cycles. Waking at the end of one instead of the middle explains why you sometimes sleep longer and feel worse.
Security How to Choose a Password That Actually Holds Up
Most password advice is twenty years out of date and made things worse. Here's what genuinely protects an account, in the order that matters.
Health BMI: What the Number Means and What It Definitely Doesn't
BMI was invented in the 1830s to describe populations, not people. Here's what it's genuinely useful for, where it fails, and what to measure instead.
Money What a Loan Actually Costs (And Why the Monthly Payment Hides It)
Lenders quote the monthly payment because it's the smallest number they can show you. Here's how to see the real cost of borrowing before you sign.
Everyday Maths How to Calculate Percentages Without Reaching for a Calculator
The four percentage questions that cover almost every real situation, the mental shortcuts that make them fast, and the three mistakes that cost people money.
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