Guides
Longer reads on the things the calculators only answer in part — how to estimate a job properly, why the units are the way they are, and where the usual rules of thumb break down.
Development7 min read
Why you shouldn't test with real customer data
The risk of production copies in staging, and why well-chosen fake data finds bugs that real data hides.
18 September 2026
Dates & time8 min read
Leap years, lost days and why calendars are hard
The 400-year rule, the eleven days Britain skipped, and why your birthday moves a weekday each year.
14 September 2026
Design & code8 min read
Choosing colours that work
Why HSL beats hex for palettes, what contrast ratios mean in practice, and the 8% of readers colour alone will fail.
10 September 2026
Automotive7 min read
Getting tire pressure right
Where to find the right figure, why cold matters, and how temperature swings quietly deflate your tires every autumn.
6 September 2026
Design & print8 min read
DPI, PPI and why your image prints blurry
How resolution actually works, the largest size a file can print at, and why viewing distance changes the whole answer.
2 September 2026
Construction8 min read
How to estimate materials for a patio, path or driveway
Work out base depth, gravel, sand and paver quantities — and the waste allowance that stops a second delivery.
26 August 2026
Measurement7 min read
Why the world still uses two measurement systems
The 1959 agreement, why the US kept imperial, and the $125m spacecraft that a unit mix-up destroyed.
22 August 2026
Digital storage7 min read
Why your hard drive shows less space than advertised
The 1000-vs-1024 split, why Windows and macOS disagree, and where the rest of the space actually goes.
18 August 2026
Cooking7 min read
Baking by weight: why grams beat cups
Why a cup of flour isn't a fixed amount, how density changes everything, and how to convert a volume recipe to weight.
14 August 2026