Route from Portsmouth to Caerphilly by car

From: Portsmouth, County: Hampshire, England
To: Caerphilly, County: Cardiff, Wales
148 mi
2 h 41 min
Fuel consumption:
Fuel cost:
Passengers:



How many miles from Portsmouth to Caerphilly?

How far is from Portsmouth to Caerphilly?


The driving distance between Portsmouth and Caerphilly is 148 miles. Travel time is 2 hours and 41 minutes by car.






148 mi 2 h 41 min
1.
Head east on Gruneisen Road
835 ft
2.
Turn left onto Twyford Avenue (A3)
40 ft
3.
Make a sharp right to stay on Stamshaw Road (A3)
0.5 mi
4.
Enter Rudmore Roundabout and take the 4th exit
612 ft
5.
Exit the roundabout
0.3 mi
6.
Merge right onto M275
1.5 mi
7.
Take the ramp
738 ft
8.
Merge right onto M27
17.1 mi
9.
Take the ramp on the left towards M3
10.1 mi
10.
Take the ramp on the left towards A34
1257 ft
11.
Enter Winnall Interchange and take the 2nd exit onto Winchester By-Pass (A34)
330 ft
12.
Exit the roundabout onto Winchester By-Pass (A34)
25.7 mi
13.
Take the ramp on the left towards Hungerford
0.3 mi
14.
Enter Bath Road Junction and take the 3rd exit onto Ermin Street (B4000)
321 ft
15.
Exit the roundabout onto Ermin Street (B4000)
3.9 mi
16.
Continue onto Newbury Road (B4000)
1154 ft
17.
Continue onto Baydon Road (B4000)
2.2 mi
18.
Turn left onto A338
0.5 mi
19.
Enter Wickham Interchange and take the 3rd exit towards M4: South Walles
940 ft
20.
Exit the roundabout towards M4: South Walles
52.9 mi
21.
Keep right onto M4
21.2 mi
22.
Take the ramp on the left
0.3 mi
23.
Enter High Cross Interchange and take the 3rd exit onto Glasllwch Crescent (B4591)
518 ft
24.
Exit the roundabout onto Glasllwch Crescent (B4591)
691 ft
25.
Turn left onto High Cross Lane
0.5 mi
26.
Turn left onto Western Valley Road
525 ft
27.
Continue onto Pye Corner
410 ft
28.
Turn right onto Park View
0.4 mi
29.
Keep right at the fork
250 ft
30.
Keep left onto Forge Road (A468)
754 ft
31.
Enter the roundabout and take the 1st exit onto Caerphilly Road
37 ft
32.
Exit the roundabout onto Caerphilly Road
3.9 mi
33.
Continue onto Chatham (A468)
0.5 mi
34.
Continue onto Commercial Road (A468)
0.5 mi
35.
Continue onto Wesley Hill (A468)
1290 ft
36.
Continue onto Newport Road (A468)
2.3 mi
37.
Continue onto Bedwas Road (A468)
0.3 mi
38.
Enter Bedwas Bridge Roundabout and take the 2nd exit
104 ft
39.
Exit the roundabout
135 ft
40.
Go straight onto Bedwas Road (B4600)
0.8 mi
41.
Turn right to stay on B4600
129 ft
42.
Turn right onto Castle Street (B4623)
537 ft
43.
You have arrived at your destination
0 ft



How much does it cost to drive from Portsmouth to Caerphilly?

The fuel cost by car depend on several factors such as the distance traveled, the driving conditions (traffic jam, slow driving, normal driving, race driving), fuel consumption of the vehicle, and the current price of fuel.

The trip with petrol fuel costs 25.6 £. In the above calculation, the petrol price is considered to be 143 pence per liter and the petrol consumption of the car is 37.5 miles per gallon.
For 2 passengers in carpooling, the cost of this trip is 12.8 £ (25.6/2) per passenger.
For 3 passengers in the car, the cost of this trip is 8.53 £ (25.6/3) per passenger.
For 4 passengers in the car, the cost of this trip are 6.4 £ (25.6/4) per passenger.


Fuel cost = (147.92 mi / 37.5 mpg) x 143 pence per liter = 25.6 £

In more detail, the result is obtained:

Fuel needed = Distance / Car fuel consumption = miles * 4.54609 / carConsumtion = 147.92 mi * 4.54609 / 37.5 mpg = 17.9 liters

Fuel needed = 17.9 lt

Fuel cost = Fuel needed x Price per liter = 17.9 liters x 143 pence per liter = 25.6 £

Fuel cost from Portsmouth to Caerphilly = 25.6 £

Why do I multiply miles by 4.54609?

Consumption is measured in miles per gallon. 37.5 mpg means that a car could travel 37.5 miles with a gallon petrol fuel. The price of fuel is in pence per liter. Gallons should be converted to liters so that the final fuel consumption on a trip is in liters. 1 gallon is 4.54609 liters, so multiply by 4.54609.


The trip with diesel fuel costs 16.2 £. In the above calculation, the diesel price is considered to be 151 pence per liter and the diesel consumption of the car is 62.7 mpg. For only one passenger the cost of the trip is 16.2 £.
For 2 passengers in carpooling, the cost of this trip is 8.1 £ (16.2/2) per passenger.
For 3 passengers in the car, the cost of this trip is 5.4 £ (16.2/3) per passenger.
For 4 passengers in the car, the cost of this trip is 4.05 £ (16.2/4) per passenger.