Mileage Calculator UK
This mileage calculator checks the road distance between two UK postcodes for transport buyers and operators. See miles, kilometres, estimated HGV journey time, diesel cost and a live route map.
- No sign-up needed
- Instant results in your browser
- Published UK data
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(function(){
var $=function(id){return document.getElementById(id);};
var UKGALLON=4.54609;
var els={from:$('mc-from'),to:$('mc-to'),via:$('mc-via'),viaRow:$('mc-via-row'),viaToggle:$('mc-via-toggle'),
go:$('mc-go'),swap:$('mc-swap'),price:$('mc-price'),msg:$('mc-msg'),results:$('mc-results'),placeholder:$('mc-placeholder'),
miles:$('mc-miles'),km:$('mc-km'),time:$('mc-time'),route:$('mc-route'),source:$('mc-source'),fuel:$('mc-fuel')};
var map=null,layer=null,lastMiles=null,lastCalc=null,lastFuelRows=[];
var geoCache={};
function norm(s){return (s||'').toUpperCase().replace(/s+/g,' ').trim();}
function compact(s){return norm(s).replace(/s+/g,'');}
function outward(s){var c=compact(s);if(c.length<=4)return c;return c.slice(0,c.length-3);}
function showMsg(t,kind){els.msg.className='ctool-msg is-'+kind;els.msg.textContent=t;}
function clearMsg(){els.msg.className='ctool-msg';els.msg.textContent='';}
function fetchJSON(url,ms){
var ctrl=new AbortController();var timer=setTimeout(function(){ctrl.abort();},ms||8000);
return fetch(url,{signal:ctrl.signal}).then(function(r){clearTimeout(timer);return r.json();})
.catch(function(e){clearTimeout(timer);throw e;});
}
function geocode(raw){
var key=compact(raw);
if(!key)return Promise.reject(new Error('empty'));
if(geoCache[key])return Promise.resolve(geoCache[key]);
var full='https://api.postcodes.io/postcodes/'+encodeURIComponent(key);
return fetchJSON(full).then(function(j){
if(j&&j.status===200&&j.result){
var r=j.result;var g={lat:r.latitude,lon:r.longitude,label:r.postcode,area:r.admin_district||r.parish||r.region,approx:false};
geoCache[key]=g;return g;
}
throw new Error('not-full');
}).catch(function(){
var oc=outward(raw);
return fetchJSON('https://api.postcodes.io/outcodes/'+encodeURIComponent(oc)).then(function(j){
if(j&&j.status===200&&j.result&&j.result.latitude!=null){
var r=j.result;var area=(r.admin_district&&r.admin_district[0])||(r.region&&r.region[0])||oc;
var g={lat:r.latitude,lon:r.longitude,label:oc,area:area,approx:true};
geoCache[key]=g;return g;
}
throw new Error('bad-postcode');
});
});
}
function haversine(a,b){
var R=6371,rad=Math.PI/180;
var dLat=(b.lat-a.lat)*rad,dLon=(b.lon-a.lon)*rad;
var la1=a.lat*rad,la2=b.lat*rad;
var h=Math.sin(dLat/2)*Math.sin(dLat/2)+Math.cos(la1)*Math.cos(la2)*Math.sin(dLon/2)*Math.sin(dLon/2);
return 2*R*Math.asin(Math.min(1,Math.sqrt(h)));
}
function fmtTime(mins){
mins=Math.round(mins);var h=Math.floor(mins/60),m=mins%60;
if(h<=0)return m+' min';return h+' h '+(m=100?Math.round(mi).toLocaleString('en-GB'):mi.toFixed(1);}
function ensureMap(){
if(map)return;
map=L.map('mc-map',{scrollWheelZoom:false}).setView([54,-2.5],5);
L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',{
maxZoom:19,attribution:'© OpenStreetMap contributors'}).addTo(map);
}
function drawMap(points,line,dashed){
ensureMap();
if(layer)map.removeLayer(layer);
layer=L.layerGroup().addTo(map);
points.forEach(function(p,i){
var colour=i===0?'#15A66B':(i===points.length-1?'#1065FF':'#0B2447');
L.circleMarker([p.lat,p.lon],{radius:8,color:'#fff',weight:2,fillColor:colour,fillOpacity:1})
.bindTooltip(p.label,{permanent:false}).addTo(layer);
});
var latlngs=line?line.map(function(c){return [c[1],c[0]];}):points.map(function(p){return [p.lat,p.lon];});
var poly=L.polyline(latlngs,{color:'#1065FF',weight:5,opacity:.85,dashArray:dashed?'8,10':null}).addTo(layer);
map.fitBounds(poly.getBounds().pad(0.15));
setTimeout(function(){map.invalidateSize();map.fitBounds(poly.getBounds().pad(0.15));},80);
}
function renderFuel(miles){
lastMiles=miles;
var price=parseFloat(els.price.value);if(!(price>0))price=146.9;
var rows=[['44t articulated lorry',9.5],['3.5t diesel van',28]];
lastFuelRows=[];
els.fuel.innerHTML=rows.map(function(r){
var litres=(miles/r[1])*UKGALLON;
var cost=litres*(price/100);
lastFuelRows.push([r[0],r[1].toFixed(1)+' mpg',litres.toFixed(1)+' L','£'+cost.toFixed(2)]);
return ''+r[0]+' '+r[1].toFixed(1)+' mpg '+
litres.toFixed(1)+' L £'+cost.toFixed(2)+'
How to use: type both postcodes, add an optional via point if the load routes through a third location, then select Calculate route. Edit the diesel price to match your pump rate.
Your distance, HGV drive time, route map and diesel cost appear here once you calculate.
Road distance
-
Estimated HGV drive time
-
excludes breaks and traffic
Route
-
Indicative diesel cost
| Vehicle | Economy | Litres used | Fuel cost |
|---|
Fuel figures are an estimate for the road distance shown, at the diesel price you set. Real consumption varies with load, terrain, driving style and idling.
Methodology and assumptions
Postcodes are geocoded with postcodes.io, a free open service built on Ordnance Survey and Office for National Statistics open data. Full postcodes use the /postcodes endpoint; where only an outward code is given (for example LS10), or a full postcode is not found, we fall back to the /outcodes endpoint and use the centroid of that outward district, so the distance is approximate to postcode-area level.
Road distance, drive time and the route line come from the public OSRM routing engine using OpenStreetMap data. OSRM returns a car-based driving time. Heavy goods vehicles are slower than cars on the same roads because of lower motorway limits and slower acceleration, so we apply a 0.85 speed factor: we assume an HGV averages 85 percent of the car speed OSRM models, and therefore divide the OSRM time by 0.85 (about 18 percent longer). The result excludes rest breaks, loading, congestion and driver hours limits, so treat it as free-flow driving time only.
If OSRM cannot be reached within 8 seconds, we fall back to the straight-line (haversine) distance multiplied by 1.25 to approximate road winding, clearly labelled as an estimate, with no route line drawn. The drive time in fallback mode assumes an average of 45 mph. Fuel cost uses miles per imperial gallon (1 gallon = 4.546 litres) at 9.5 mpg for a typical 44 tonne articulated lorry and 28 mpg for a 3.5 tonne diesel van, multiplied by the diesel price you enter. Assumptions current as of July 2026. This tool gives planning-grade estimates, not a legal record of duty time or a fuel guarantee.
Frequently asked questions
How do I check the mileage between two UK postcodes?
Enter your start and destination postcodes above and select Calculate route. You get the road distance in miles and kilometres, an HGV drive-time estimate and a map of the route. You can use full postcodes or outward codes such as M1 or LS10.
Is the drive time for a car or a lorry?
It is an HGV estimate. We take the car driving time from OSRM and slow it to 85 percent of car speed to reflect lower lorry limits and acceleration. It is free-flow time and does not include breaks, loading or traffic, so allow extra for real journeys.
Can I add a stop or via point?
Yes. Select Add via point and enter a third postcode. The route is then calculated through that point, and the distance and time reflect the detour. For several drops, use our multi-drop route planner instead.
How accurate is the fuel cost estimate?
It is indicative. We use widely quoted fuel economy figures (9.5 mpg for a 44 tonne artic, 28 mpg for a 3.5 tonne van) and the diesel price you enter. Actual usage depends on payload, gradients, driving style and idling, so use it for comparison rather than invoicing.
Why does an outward-only postcode give a rough distance?
An outward code such as LS10 covers a whole district, so we use its centre point. That is fine for planning, but for precise mileage enter the full postcode including the inward part (for example LS10 1AB).
Is this mileage checker free to use?
Yes, it is completely free with no sign-up. It runs in your browser using open UK postcode and OpenStreetMap data.
Know the mileage, now secure the right operator
Once you know the distance and drive time for a lane, the next question is who runs it. Brief CTS on your route and we place it before vetted UK operators with the licence, fleet and track record to deliver, whether you need one-off contract haulage or ongoing contract distribution. It is free and there is no obligation.
Request quotes