Slab and Paver Calculator –
Calculate How Many Slabs You Need
Instantly Calculate Paving Slabs for Patios, Driveways & Gardens
Looking for an easy way to calculate the number of slabs or pavers needed for your project?
Our Slab and Paver Calculator helps you determine the exact number of slabs required for your patio, driveway, or garden paving. Whether you’re working with 450x450mm slabs, 600x600mm slabs, or custom sizes, our tool simplifies the process and ensures you get an accurate estimate.
✔ Instant slab calculation for patios, driveways, and paths
✔ Supports UK & US measurements – switch between m² and ft²
✔ Cost estimator included – calculate total slab cost
✔ Perfect for DIY projects & professional landscapers
🚀 Try our Paving Slab Calculator now and get instant results!
How to Use the Paving Slab Calculator
Using our online slab calculator is simple:
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Select Slab Size – Choose from common paving slab sizes (e.g., 450x450mm, 600x600mm, or custom sizes).
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Enter Area – Input the total area in square meters (m²) or square feet (ft²).
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Enter Slab Price (Optional) – Calculate total cost based on slab price per unit.
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Click Calculate – Instantly see how many slabs you need and total cost.
Example: If you’re laying a patio with 600x600mm slabs and have an area of 10m², the calculator will tell you exactly how many paving slabs you need.
How Many Slabs Per m²?
Paving Slab Coverage Guide
If you're wondering, "How many slabs do I need per square meter?", here’s a quick reference guide:
✔ 450x450mm slabs → 4.94 slabs per m²
✔ 600x600mm slabs → 2.78 slabs per m²
✔ 300x300mm slabs → 11.11 slabs per m²
✔ 900x600mm slabs → 1.85 slabs per m²
💡 Tip: Always allow for extra slabs for cutting and adjustments.
Cost of Paving Slabs –
Driveway & Patio Estimator
How much does it cost to lay paving slabs? Use our calculator to estimate your total cost based on:
✔ Slab price per unit – Enter price per slab (e.g., £5 per 450x450 slab).
✔ Number of slabs required – Auto-calculated based on area.
✔ Total project cost – Instant total cost estimation.
Frequently Asked Questions –
Paving & Slab Calculator
How do you calculate slabs for a patio?
To calculate slabs for a patio, measure the total area (m² or ft²), choose slab size, and divide the total area by the slab area. Our slab calculator does this instantly!
How many 450 x 450 slabs per m²?
You need 4.94 slabs per m² when using 450x450mm paving slabs.
How many 600 x 600 slabs per square meter?
You need 2.78 slabs per m² when using 600x600mm paving slabs.
How many slabs do I need for my driveway?
Measure your driveway area and use our calculator to find out how many slabs are required.
Is it better to use larger or smaller paving slabs?
Larger slabs (e.g., 600 x 600mm) cover more area with fewer slabs, reducing installation time. Smaller slabs allow for more design flexibility.
Can I use this calculator for block paving?
Yes! You can use this calculator for block paving, patio paving, garden slabs, and driveway pavers.