Vehicle Diesel Usage Calculator
Instantly calculate mpg, litres per 100 km, cost per mile and total fuel cost for your lorries, HGVs, vans or fleet vehicles.
Enter Your Journey Data
Input recent trip or period to see real fuel economy and costs.
UK Road Vehicle Benchmarks 2026
Based on 2025–2026 UK averages. Actual varies by load, speed, tyres, aerodynamics & driving style.
Track Fuel Economy & Full Fleet
Log fuel fills, see mpg trends per vehicle, get MOT/service reminders, and calculate total cost per mile/km.
- Real-time mpg & cost tracking
- Compliance (MOT, tax, tachograph)
- Team event logging from cab
How Much Diesel Should Your Lorry or Van Use in 2026?
Pump diesel prices have swung significantly through 2026 — always check your own fuel card statement or receipt and update the price field above rather than relying on a fixed figure. Fuel is typically the largest running cost for haulage and logistics fleets, so improving mpg by even 1 point can save thousands annually.
Typical UK Road Vehicle Consumption (2026)
- 44-tonne articulated HGV (motorway loaded): 7–9 mpg
- 44t artic mixed roads: 6–8 mpg
- 18–26t rigid truck: 9–12 mpg
- 7.5t rigid: 12–18 mpg
- 3.5–7.5t van: 25–35 mpg
Quick Tips to Improve mpg
- Reduce speed — every 5 mph over 56 mph can drop mpg by 10–20%
- Maintain tyre pressure & alignment — under-inflation costs 2–5% fuel
- Avoid unnecessary idling — modern trucks burn 2–4 L/hour when stationary
- Use cruise control & gentle acceleration
- Regular servicing — clean air filters, injectors & EGR can improve 5–10%
Want to stop manual calculations? FleetBolt automatically tracks fuel fills, mpg trends, MOT reminders, service intervals and total cost per mile for every vehicle in your fleet.
Get Started Free