Work out roughly how many parking bays will fit on your site before you commit to a layout, an order of thermoplastic markings, or a quote. Enter your plot size and bay type below for an instant estimate.
Calculate your layout
Suggested accessible bays: 0 (rule of thumb — see note below)
Area used: 0 m² of 0 m² available
How this calculator works
Car park bay sizes and aisle widths vary depending on the angle you park at. Tighter angles (45°/60°) need less manoeuvring space but fit fewer bays per metre of aisle, while 90° bays pack in the most bays per row but need a wider aisle to turn into them. This tool uses commonly used UK sizing guidance for each type:
| Bay type | Bay width | Bay depth | Aisle width |
|---|---|---|---|
| 90° standard | 2.4m | 4.8m | 6.0m |
| 60° angled | 2.7m | 5.3m | 4.6m |
| 45° angled | 3.0m | 5.0m | 3.7m |
| Parallel | 6.0m | 2.4m | 3.7m |
A double-loaded layout runs an aisle down the middle with bays on both sides — the most space-efficient option for larger plots. A single-loaded layout puts bays along one edge only, useful for narrow or oddly shaped sites.
Planning your car park: a few things to check
Accessible bays
Most UK guidance expects at least one accessible (disabled) bay for smaller car parks, rising roughly in line with total capacity — many local authorities use a rule of around 5% of total spaces as a starting point. Always confirm the exact requirement with your local planning authority or Building Regulations Part M, as it varies by site type and use.
Turning circles and fire access
Aisle widths above assume standard passenger vehicles. If HGVs, delivery vehicles, or emergency access routes need to use the same aisles, you'll usually need extra width — check with your site designer.
Line marking materials
Once your layout is confirmed, our thermoplastic line marking and line marking paint ranges cover both long-life heat-applied markings and cost-effective painted lines for every bay type above.
Frequently asked questions
Is this calculator accurate enough to submit for planning permission?
No — treat it as a starting point for budgeting and feasibility only. Planning submissions typically require a scaled, professionally drawn layout that accounts for your specific site boundary, gradients, drainage, and access points.
What if my plot isn't a simple rectangle?
The calculator assumes a rectangular plot. For irregular or sloped sites, use this tool for a rough capacity estimate and speak to a car park designer for the final layout.
Can I mix bay types in one car park?
Yes, many car parks combine standard bays with a smaller number of accessible, parent-and-child, or EV charging bays. Run the calculator separately for each zone of your site if you're mixing types.
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