Calculate the straight-line distance between two latitude and longitude coordinates in miles and kilometres.
Your estimated travel distance
How the travel distance calculation works
This calculator uses the Haversine formula to estimate the shortest distance across the Earth’s surface between two coordinate pairs. It then converts the result between kilometres and miles. The optional percentage adjustment produces a rough route-distance estimate, while average speed gives a simple travel-time estimate.
| Result | Meaning |
|---|---|
| Straight-line distance | The shortest surface distance between the two coordinates |
| Adjusted route estimate | Straight-line distance increased by your chosen percentage |
| Travel time | Adjusted miles divided by average speed |
Latitude measures position north or south of the Equator. Longitude measures position east or west. The US National Ocean Service provides a clear official explanation of latitude and longitude.
Straight-line distance versus road distance
Roads rarely follow a direct line. Bridges, coastlines, terrain, restricted routes and the road network can make an actual journey longer. Use the adjustment only for early planning and confirm the route with a live navigation service before travelling.
After estimating mileage, calculate vehicle spending with the Car Running Cost Calculator UK. You can estimate a cab journey using the Taxi Fare Calculator UK or compare borrowing costs through the Car Finance Calculator UK.
Browse more UK tools on the United Kingdom Calculator homepage.
Frequently asked questions
What is straight-line distance?
It is the shortest surface distance between two coordinate points, sometimes described as distance “as the crow flies”.
Does this calculator show driving distance?
Not exactly. The adjustment provides a rough estimate, but real driving distance requires a live route-planning service.
Where can I find coordinates?
Many digital maps show latitude and longitude when you select or right-click a location.
Why can the travel-time estimate differ?
Traffic, stops, speed limits, road types, weather and route changes all affect real travel time.
Can I calculate distances outside the UK?
Yes. Valid latitude and longitude coordinates work for locations worldwide.