Free tools
Simple calculators built on UK guidance and published research. Free to use, nothing to sign up for, and your answers stay on your device.
Caffeine calculator
Add up the caffeine in your coffee, tea and energy drinks, see how much is still in you at bedtime, and find your latest coffee time.
Work out your caffeineMagnesium calculator
Find your UK daily amount, see how much magnesium a supplement label really gives you, and which form suits what you want it for.
Work out your magnesium