About the Drive Time Calculator
This tool calculates the estimated driving time and road distance between any two UK postcodes. Enter your start and end postcodes to see how long the journey takes, the road distance, and the route plotted on a map.
How It Works
The tool looks up both postcodes from our database to get their geographic coordinates, then queries a routing engine (OSRM, built on OpenStreetMap road data) to calculate the actual road route. This gives you a realistic road distance and drive time based on the road network, not just a straight-line estimate. If the routing service is unavailable, the tool falls back to a server-side estimate based on straight-line distance with a road multiplier and average speeds.
Drive Time Accuracy
The driving time shown is an estimate based on typical road speeds and the fastest route between the two postcodes. It does not account for real-time traffic, roadworks, school runs, or weather conditions. Treat it as a baseline journey time under normal conditions. Actual drive times can vary by 20-50% depending on when you travel, particularly for routes through busy urban areas or motorway junctions.
Road Distance vs Straight Line
The tool shows both the road distance (following actual roads) and the straight-line distance (as the crow flies). Road distance is typically 20-40% longer than straight line, though this varies. Short urban journeys often have a higher multiplier because of one-way systems and indirect routes. Longer motorway journeys are closer to the straight-line distance because motorways follow relatively direct paths.
Common Uses
Commute Planning
Knowing the drive time between your home postcode and workplace helps you plan your day and evaluate whether a move is practical. A 15-mile commute might take 20 minutes on clear A-roads or 50 minutes through city traffic. The actual route and road type matter more than raw distance.
Business Mileage
If you need to log mileage for expenses or tax purposes, the road distance between postcodes gives you a defensible figure. HMRC accepts postcode-to-postcode distances for mileage claims. The straight-line distance is not appropriate for mileage calculations.
Delivery and Service Areas
Businesses that charge by distance or define service zones based on travel time can use this tool to check specific postcode pairs. If you offer free delivery within 30 minutes, you can test postcodes at the edge of your area to see if they fall inside or outside.
Property and Relocation
When considering a house move, drive time to work, schools, family and regular destinations is often more important than the raw distance. Two postcodes the same distance from your workplace can have very different drive times depending on the route.
Route Map
The map shows the calculated driving route between the two postcodes. The route follows the road network and represents the fastest route at the time of calculation. Alternative routes may exist that are shorter in distance but longer in time, or vice versa. For journeys with multiple viable routes (like London orbital trips), the tool picks the fastest single option.
Limitations
This tool covers postcodes in England, Scotland, Wales and Northern Ireland. Route calculation uses OpenStreetMap road data, which is highly accurate for the UK but may occasionally differ from commercial navigation services like Google Maps or Waze. The tool does not account for toll roads, congestion charges, or ferry crossings. For very short distances (under 0.5 miles), the routing may not find a meaningful driving route and walking might be more appropriate.
Distance Calculation Method
Straight-line distance uses the Haversine formula, which calculates the shortest distance over the Earth's surface between two points, accounting for the curvature of the Earth. Road distance comes from the OSRM routing engine, which traces the fastest path through the actual road network using OpenStreetMap data. Drive time is calculated by OSRM based on road types, speed limits and typical driving speeds for each road segment in the route.