How Much Gravel for a Patio?
Planning a gravel patio? Enter your measurements below to find out exactly how much material you need. Our calculator uses the recommended 40mm depth for patio areas and gives you results in tonnes, bags, and estimated cost.
Dimensions
About Patio Gravel
A gravel patio is a fantastic low-maintenance alternative to traditional paving. There’s no grouting to crack, no slabs to become uneven as the ground shifts, and no moss or algae to pressure-wash every spring. Gravel also costs a fraction of the price of quality paving and can be laid in a day rather than a week.
The biggest concern people have with gravel patios is furniture stability. The good news is that with the right preparation — a compacted sub-base, weed membrane, and 40mm of angular gravel — garden furniture sits surprisingly firmly. For dining sets, consider using paving slabs as pads under table and chair legs, creating a hybrid surface that combines the beauty of gravel with the practicality of hard standing where you need it.
Decorative stone opens up far more colour and texture options than paving slabs. You can choose from dark slate gravel, bright white polished pebbles, rich chocolate tones, or striking multicoloured stone. Many homeowners use different aggregates to define zones within a patio area — slate gravel in one section, polished pebbles in another.
Recommended Depth
40mm (4cm) is the recommended depth for a gravel patio. This provides a solid, level surface that fully conceals the membrane beneath and feels stable underfoot. For areas where you’ll place heavy furniture, ensure the sub-base is well-compacted so the gravel doesn’t develop dips over time.
UK Planning & Regulations
Unlike concrete or slab patios, a gravel patio is classed as a permeable surface and doesn’t count towards the 5m² impermeable surface threshold that triggers planning permission requirements. If your patio connects to a paved driveway, the combined area matters — but gravel sections don’t count. Some water companies, including United Utilities in the North West, even offer surface water drainage rebates for properties with permeable surfaces.
Tips for Your Patio Project
- Use paving slab “pads” under heavy furniture legs for extra stability. A few slabs set flush with the gravel surface give you the best of both worlds.
- Install a solid border around the patio edge — sleepers, brick, or stone setts — to create a clean boundary and prevent gravel from spreading.
- Choose lighter-coloured stone (like white polished pebbles or quartz) to make a small patio area feel larger and brighter.
- Compact the sub-base thoroughly with a plate compactor or heavy roller. A well-prepared base is the single biggest factor in how your patio looks and performs long-term.
Seasonal Buying Tip
Plan your patio project for a dry spell in spring or early autumn. The ground needs to be firm for proper sub-base compaction. Order gravel in winter for the best prices, but don’t lay it on frozen or waterlogged ground — wait for a dry week with temperatures above 5°C for the best results.
What type of gravel is best for a patio?
For patios, angular slate gravel gives a clean, modern look that compacts well. For a more luxurious feel, polished pebbles in white quartz, chocolate, or maroon catch the light beautifully — though lighter colours may need occasional washing to stay bright. You can also combine gravel and pebbles to create defined zones within the patio space.
Frequently Asked Questions
Is gravel cheaper than paving for a patio?
Can you put garden furniture on a gravel patio?
How do I maintain a gravel patio?
Do gravel patios drain well?
How do I stop weeds growing through a gravel patio?
Ready to order your patio gravel?
Browse quality aggregates delivered across the UK, or visualise how different stones will look in your space.