About Postcodes UK
Postcodes UK is a free geographic reference site dedicated to the United Kingdom postcode system. Our editorial team researches and writes guides covering postcodes, distances, centroids and the tools that make location data accessible to everyone.
We combine Ordnance Survey data, Royal Mail postcode records and government open data to build a comprehensive picture of every postcode, town and county across England, Scotland, Wales and Northern Ireland.
Our goal is to make UK geographic data simple, accurate and freely available. Every article we publish is grounded in the datasets that power the site, and every distance, coordinate and boundary we reference has been verified against authoritative sources.
Data Sources & Credentials
Articles by Postcodes UK
Understanding the Haversine Formula
The Haversine formula calculates distances between two points on the Earth. Here is how it works and how we use it across Postcodes UK.
Read articleWhat Is a Centroid and How Do We Use Them?
Centroids are the geographic centre points we use to plot postcodes, towns and counties on maps. Here is how they work and why they matter.
Read articleIntroducing Postcodes UK
A new free resource for exploring UK postcodes, cities, towns and villages. Find out what we offer and how we can help.
Read article