Guide · Updated June 2026

HGV Mileage and Fuel Calculator — Accurate Distance & Fuel for UK Trucks

A practical guide to calculating accurate HGV mileage and fuel consumption for billing, fuel-tax reclaim, and route planning — using a truck-aware mileage estimator instead of a car satnav.

Why a car mileage calculator gets HGV distance wrong

A generic mileage calculator routes a car: it'll happily send you through a 6-foot lane, under a 4-meter bridge, or across a 7.5-tonne-restricted village. The resulting distance is fiction — it's a route an HGV legally cannot take. When you bill from that number, you're under-billing every job that had to detour around real-world restrictions.

A truck mileage calculator filters the network against your vehicle profile first, then measures distance along the legal route. That number ties to the kilometers your driver actually covered — and to the fuel they actually burned.

What a billing-grade HGV mileage estimator needs

  • Vehicle profile — height, width, length, gross weight, axle load, hazmat class.
  • Restriction-aware routing — rejects illegal roads, not just preferred ones.
  • LEZ / ULEZ / CAZ awareness — flags chargeable zones so the charge ends up on the invoice.
  • Multi-stop support — billing accuracy collapses if drops are stitched together by a straight line.
  • Per-leg distance — itemised mileage from origin → drop 1 → drop 2 → destination.

Estimating HGV fuel consumption

HGV fuel burn isn't a single MPG figure — it varies with gross weight, axle load, terrain, and driving style. A rough working model most operators use:

  • Rigid 7.5–18 t: typically 12–18 MPG laden, 16–22 MPG empty.
  • Artic 26–44 t: typically 7–10 MPG laden, 9–12 MPG empty.
  • Terrain penalty: add ~10–15% for hilly routes, ~5% for heavy urban stop-start.

Multiply the route's HGV-aware distance by the vehicle's recent real-world MPG (not the manufacturer figure) to estimate fuel burned, then by the current pump price for fuel cost. For fuel-tax reclaim purposes (Fuel Duty, MOT-recognised business mileage), keep the route record alongside the figure.

How HAULPATH gives you accurate HGV mileage

  1. Build a vehicle profile once — height, width, length, gross weight, axle load, hazmat.
  2. Plan the route with origin, drops and destination; HAULPATH filters every leg against UK restrictions.
  3. Read the per-leg distance and total mileage from the route summary — the same number your driver covers.
  4. Apply your vehicle's real-world MPG to estimate fuel burned and cost for each leg.
  5. Save the route for the job record so the mileage is auditable for billing and fuel-tax purposes.

Five HGV mileage mistakes that cost money

  • Billing from a car-route distance — under-bills every restricted detour.
  • Using one MPG figure across rigid and artic fleet — burn rates aren't comparable.
  • Ignoring LEZ / ULEZ daily charges — they belong on the invoice, not the P&L.
  • Estimating multi-stop jobs as a single A→B leg — drops compound the under-billing.
  • No route record alongside the mileage — fails audit for fuel-tax reclaim.

Try it on a real UK job

HAULPATH is free for independent drivers — build a profile, plan a UK route, and read accurate HGV mileage you can bill from in seconds.

Plan an HGV route now

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