Blog
Short pieces on the maths behind the tools, and where the common formulas quietly mislead.
Articles
How many tablespoons are in a cup?
The exact answer, the tricky thirds, and why cups differ worldwide.
Celsius to Fahrenheit for oven temperatures
The formulas, the gas marks, and the fan-oven adjustment charts forget.
How many MB are in a GB? Units explained
Why the answer is both 1,000 and 1,024 — and where your drive space goes.
Grams to cups: flour, sugar and butter
Why there is no single answer, and the numbers that actually work.
Inches to centimetres: the complete guide
The exact factor, heights, screen sizes, and why 2.54 is no accident.
Kilograms to pounds, made simple
The exact factor, fast mental shortcuts, and the conversions you actually need.
Word and character counts: a practical guide
Why counts disagree, what each one is for, and how to use them to write better.
Aspect ratio explained: 16:9, 4:3 and beyond
What the numbers mean, why black bars appear, and how to resize cleanly.
How to read Roman numerals
Seven symbols, two rules, and every year in the film credits decoded.
Hex, RGB and HSL colours explained
Three ways to write the same colour, and when each one is the right tool.
Millilitres to cups: a liquid conversion guide
The numbers, the cup-size problem, and when it actually matters.
Square feet to square metres, done right
The factor is squared — miss that and you understate area threefold.
What "hashed passwords" really means
How hashing differs from encryption, and why it protects your accounts.
Running pace explained: hit your target time
How pace, speed, distance and time connect — and how to plan a race.
How to calculate time durations correctly
Why time maths goes wrong, and a reliable method that does not.
How compound interest actually works
Why compounding frequency matters far less than the rate.
What BMI can and cannot tell you
Built for populations, routinely misread for individuals.
Percentage change trips everyone up
A 50% fall needs a 100% rise to break even.