Free Practical Guides for Everyday Calculations
Plain-English explanations for the calculations behind our tools — with worked examples, practical tips and answers to common questions.
How to Find Anagrams and Improve at Word Games
How anagram solvers work, exact versus words-within modes, tips for Scrabble and crosswords, and how to get the best results from any letter set.
Quick QRQR Codes Explained: How They Work and How to Use Them Safely
What QR codes are, how they store data, what types of content they can carry, how to create and print them reliably, and how to scan them safely.
Budget WiseHow to Build a Monthly Household Budget
Step-by-step guide to calculating income, listing fixed commitments, handling irregular bills, estimating variable spending and finding money to save.
DecortasticHow to Calculate Paint and Wallpaper for a Room
Measuring wall area, allowing for doors and windows, using coverage rates, calculating wallpaper rolls and allowing for pattern repeat.
Figure ItEveryday Maths: Percentages, Discounts, VAT and Ratios
How to calculate percentages, work out discounts, add or remove VAT, split bills and use ratios — with worked examples for each.
DatefullyHow Date Calculations Work: Days, Ages and Leap Years
Counting days between dates, calculating exact ages, understanding leap years and handling the calendar edge cases that trip up manual counting.
Workday CountHow to Calculate Working Days Between Two Dates
Counting business days excluding weekends and bank holidays, calculating notice periods, project deadlines and service level timescales.
Mile MinderHow to Calculate Fuel Cost for a Journey
The calculation for petrol, diesel and electric vehicles, understanding MPG, cost per mile, sharing costs between passengers and what affects real consumption.
Unit SwitchMetric and Imperial Conversion Guide
Key conversions for length, weight, volume, temperature, area and speed — with the figures you need, common pitfalls and quick mental shortcuts.
Watt WiseHow to Calculate the Electricity Running Cost of an Appliance
Understanding watts, kilowatts and kWh, the calculation step by step, worked examples for common appliances and tips for reducing running costs.
Recipe RightHow to Scale a Recipe Up or Down
Calculating the scale factor, which ingredients scale directly and which need adjustment, baking-specific considerations and handling fractional quantities.
Goal SaverHow to Plan and Calculate a Savings Goal
The four variables in any savings plan, how compound interest accelerates progress, choosing a sustainable contribution and staying on track.