Guides
49 plain-English guides to the maths behind the tools, with worked examples. Each one links to the calculator it explains, grouped by line.
Math
- Percentage calculations made simple
- Calculator vs spreadsheet: which to use when
- Scientific calculators for physics and chemistry students
- Basic calculator guide for business maths
- Circle formulas: circumference, area, diameter
- Construction maths: materials, area and concrete
- Date arithmetic and planning
- Free vs premium calculators
- Online vs mobile calculator apps
- Advanced functions on a scientific calculator
Health
Money
Converters
- Celsius, Fahrenheit and Kelvin
- Area converter guide: square metres, acres, hectares
- Recipe measurements and scaling
- Bytes, KB, MB, GB and TB
- Joules, calories and BTU
- Metric and imperial length conversion
- Power units explained: watts, horsepower, PS and BTU/h
- PSI, bar and pascal
- Speed and velocity units
- Kilograms, pounds, grams and tons