UK Road Fuel Cost Estimator
Swansea → Cardiff
How much petrol or diesel does it cost to drive from Swansea to Cardiff? Breakdown by vehicle type using today's United Kingdom fuel prices, updated from the datasource.
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Fuel Cost by Vehicle Type
Select your vehicle to see the detailed fuel breakdown for this route. Prices as of 18 May 2026.
Monthly Fleet Fuel Cost
Running this route regularly? Estimated one-way fuel cost per month, by trip frequency. Figures use primary fuel for each vehicle type (toll excluded).
| Vehicle | 1×/month | 5×/month | 10×/month | 22×/month |
|---|---|---|---|---|
Motorcycle Petrol | GBP 3 | GBP 13 | GBP 26 | GBP 57 |
Car / SUV Petrol | GBP 9 | GBP 43 | GBP 87 | GBP 190 |
Van / MPV Diesel | GBP 14 | GBP 68 | GBP 137 | GBP 301 |
Lorry Diesel | GBP 25 | GBP 123 | GBP 246 | GBP 542 |
Add GBP 0.00 toll per one-way trip to get total trip cost per journey.
Full Fuel Cost Comparison
All vehicle types × all fuel types for this route.
| Vehicle | km/L | Petrol | Diesel | Fuel + Toll |
|---|---|---|---|---|
| Motorcycle | 40 | GBP 2.60 | — | GBP 2.60 |
| Car / SUV | 12 | GBP 8.66 | — | GBP 8.66 |
| Van / MPV | 9 | GBP 11.54 | GBP 13.68 | GBP 13.68 |
| Lorry | 5 | — | GBP 24.63 | GBP 24.63 |
"Fuel + Toll" uses the primary fuel type for each vehicle. Toll is one-way estimate.
Today's Fuel Prices in United Kingdom
GOV.UK weekly road fuel prices used in all calculations above
Last updated: 18 May 2026. Prices are sourced from GOV.UK weekly road fuel prices.
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Common Questions: Swansea to Cardiff
How far is Swansea to Cardiff?
The highway distance from Swansea to Cardiff is approximately 66 km. The estimated driving time is 0h 53m under normal highway conditions.
How much petrol does a car use from Swansea to Cardiff?
A typical car with 12 km/L mileage uses approximately 5.5 litres of petrol. At today's Petrol price (GBP 1.57/L), that costs GBP 8.66.
How much does a lorry spend on diesel from Swansea to Cardiff?
A lorry averaging 5 km/L needs about 13.2 litres of diesel for this route. At GBP 1.87/L, the fuel cost is GBP 24.63 one-way.
What is the toll charge from Swansea to Cardiff?
The estimated one-way toll on this highway route is approximately GBP 0.00. Most UK road charges are limited to specific crossings, bridges, tunnels, or the M6 Toll. This rollout keeps the route-level baseline at zero and links the official charge pages for the main tolled corridors.
How much does a motorcycle spend on fuel from Swansea to Cardiff?
A motorcycle averaging 40 km/L uses about 1.6 litres. At today's Petrol price, that's GBP 2.60, making it the most fuel-efficient option for this route.
What is the total cost (fuel + toll) for a delivery van on this route?
A delivery van using diesel at 9 km/L needs 7.3 litres, costing GBP 13.68 in fuel. Add the GBP 0.00 toll for a total one-way cost of approximately GBP 13.68.
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