Tools
How to write formulas on this site
Write maths in plain words and symbols and the site typesets it. Every example on this page, with what you type and what the reader sees.
Tools
Small calculators and converters that run in your browser. Use them here or copy the code.
Tools
Journey Cost Calculator
Work out what a journey will cost from the distance, your car's MPG and the price of fuel per litre, with the code to reuse.
Tools
QR Code Generator including code to use on your website
Make a QR code for any text or link in your browser, and copy the code that runs the generator to use it on your own website.
Tools
Remove VAT from a price tool (with code for your website)
Remove VAT from any price at any rate with this tool, and copy the commented HTML and JavaScript for your own website.
Tools
Convert Celsius to Fahrenheit and Fahrenheit to Celsius
Convert between Celsius and Fahrenheit with this small tool, and copy the HTML and JavaScript to run it on your own site.
Tools
How to remove VAT from a price using a calculator.
Take VAT off a price on any calculator or in your head: divide by 1.2 for the UK rate, with the reasoning and a worked example.