Paving Patio Calculator
Paving Patio Calculator (UK & USA)
```This calculator is designed to estimate the number of paving slabs needed for patios and garden projects. Whether you’re planning a small backyard patio in Manchester or a poolside space in Miami, this tool helps homeowners, landscapers, and DIYers accurately plan material quantities — accounting for gaps, cuts, and waste.
Project Suitability
- Garden patios, courtyards, walkways, and terraces
- Use for natural stone, concrete, or porcelain pavers
- Supports both metric and imperial units
Paver & Area Guidelines
- Measure total area (Length × Width) and paver size
- Allow 10mm or 3/8" for joint spacing
- Include 10–15% for cutting and waste
Common Slab Sizes
| Region | Size 1 | Size 2 | Size 3 |
|---|---|---|---|
| 🇬🇧 UK | 450mm x 450mm | 600mm x 600mm | 900mm x 600mm |
| 🇺🇸 USA | 18" x 18" | 24" x 24" | 36" x 24" |
Pro Tips
- Lay slabs dry first to test layout
- Use spacers or battens to keep joints even
- Don’t forget drainage fall (1:60 slope)
Avoid These Mistakes
- Not including joint gaps in layout
- Forgetting to order extra slabs
- Using different batch numbers (can cause colour mismatch)
FAQs
- How many slabs do I need for 10m²?
Depends on slab size – e.g. 600x600mm: ~28 slabs - Should I use sand or mortar?
Mortar for permanence, sharp sand for flexibility - What’s the best paver layout?
Stretcher bond or random patterns for aesthetic appeal
