Driveway Size Calculator
Enter how many cars, whether they park side by side or one behind another, any extra length to the road and the surface. The calculator gives the driveway size, the area and the gravel, concrete or blocks needed.
- Driveway size
- Area
- Gravel or concrete
Extra length is the run from the parking spaces to the road or gate.
Each parked car needs about 3 m (10 ft) by 5.5 m (18 ft). Two cars side by side need a driveway about 6 × 5.5 m, which is 33 m². Gravel 10 cm deep for that is about 5.3 tonnes, on about 6.9 tonnes of sub-base.
Driveway size chart
Side by side, no extra length. Search for cars.
| Cars | Size (m) | Area (m²) | Gravel (t) |
|---|---|---|---|
| 1 | 3 × 5.5 | 16.5 | 2.6 |
| 2 | 6 × 5.5 | 33 | 5.3 |
| 3 | 9 × 5.5 | 49.5 | 7.9 |
| 4 | 12 × 5.5 | 66 | 10.6 |
| 5 | 15 × 5.5 | 82.5 | 13.2 |
| 6 | 18 × 5.5 | 99 | 15.8 |
Gravel 10 cm deep.
Cars and driveway
Side by side. Slide the number of cars.
The plan shows each parked car.
How to size a driveway
Cars to area. Step through it.
Cars
How many.
Slope the driveway slightly away from the house so rain drains off.
Gravel, concrete or block paving
Surfaces. Compare them.
Cheapest.
Strong.
Neat.
Permeable surfaces let rain soak in and often avoid planning issues.
Before you build
Driveway checks. Tick each item.
Tick each item as you go.
A dropped kerb onto a public road usually needs council permission.
What you get
Driveway sizing. Each tile explains one result.
Width and length.
m² and sq ft.
Tonnes.
Tonnes.
Side or line.
Allow extra width if you need to open car doors beside a wall or fence.
Frequently Asked Questions
No question matches that search.
How big should a driveway be for two cars?
About six metres wide and five and a half metres long side by side.
How wide is a single driveway?
About three metres, or ten feet.
How much gravel do I need for a driveway?
About one point six tonnes per cubic metre, so a hundred millimetre layer needs about zero point one six tonnes per square metre.
How deep should driveway gravel be?
About ten centimetres on a compacted sub-base.
How thick should a concrete driveway be?
About ten centimetres for cars.
Do I need planning permission for a driveway?
Sometimes, especially for a new dropped kerb or a non-permeable surface.
How long should a driveway be?
About five and a half metres per car parked in line.
Room to park
Size the driveway for your cars and order the right amount of material, and the job goes in once.
More size calculators
Each one has its own calculator, worked examples and answers to common questions.