Free tools for alcohol-free days

Credits and licences

Last updated 2026-10-24

Our own code

The tools and page layouts are written for this site, and the counting rules are the same code that runs in the DryTally app. The pages make no requests to other servers and use system fonts.

Data and sources

  • Standard drink sizes are the figures published by each country’s health agency. The standard drink calculator names the agency, links the official page and gives the date checked for every country. The WHO reference of 10 g is used where a country has no single figure.
  • Alcohol units and the 14-unit weekly guidance follow the NHS.
  • Calories per gram follow the NHS and the FAO energy conversion factors. The typical carbohydrate values in the presets come from USDA FoodData Central (SR Legacy), a US government work in the public domain.

Third-party code

None. If we add any library, font or data set, it will be listed here with its licence and a link.