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.
Explainers What Is the Difference Between JPEG, PNG and WebP?
JPEG for photographs, PNG for graphics and transparency, WebP for both at smaller sizes. Which to use where, and why saving a JPEG twice degrades it.
Explainers What Is the Mean, Median and Mode?
Three ways to describe the middle of a set of numbers, and they can disagree wildly. Which to use, how outliers break the mean, and why the median is usually safer.
Health What SPF Do I Actually Need?
SPF 30 blocks about 97 percent of UVB and SPF 50 about 98. The bigger issue is that most people apply a third of the amount the rating assumes.
Home What Temperature Should I Wash Clothes At?
Thirty degrees suits most everyday laundry and uses far less energy than 60. When a hot wash is genuinely needed, and why the detergent matters more than the dial.
Home What Temperature Should My Fridge Be?
Between 0 and 5 degrees Celsius, with the freezer at minus 18. Why the dial number is not the temperature, where the cold spots are, and how to check with a thermome.
Writing When Should I Use Title Case?
Title case capitalises the important words and leaves short ones lowercase. Which style guide says what, where sentence case is preferred, and the rules that actuall.
Money Does the 50/30/20 Budget Rule Actually Work?
Fifty percent on needs, thirty on wants, twenty on savings. It is memorable and it is wrong for a lot of people. Here is when it fits and how to adjust it.
Explainers How Big Is a Megabyte vs a Gigabyte?
A gigabyte is a thousand megabytes, which is a thousand kilobytes. What each holds in photos, songs and video, and why your 1 TB drive shows as 931 GB.
Explainers How Long Is a Billion Seconds?
A billion seconds is about 31.7 years. A million seconds is 11.6 days. The gap between the two is the clearest illustration there is of how badly we picture large nu.
Health How Long Does It Take to Lose a Pound of Fat?
A pound of body fat holds roughly 3,500 calories. At a 500-calorie daily deficit that is a week, in theory. In practice it slows down, and here is why the maths drifts.
Health How Many Calories Does Sleep Burn?
Roughly 45 to 60 calories an hour for most adults, or 350 to 500 over a night. It is not exercise, but it is a reminder that resting metabolism is most of what you burn each day.
Work How Many Hours Is Part-Time?
There is no legal definition. Part-time means fewer hours than your employer's full-time staff, usually anything under 35 to 37.5 a week.
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