Cement quantity: screed, render, slab
Area and thickness are all you need: here is the number of 35 kg cement bags and the sand to plan for. The mixes are the ones used on site: screed at 300 kg/m³, render at 350 kg/m³, concrete slab at 300 kg/m³.
| 📦 Mortar/concrete volume | |
| 🧱 Cement | |
| 🛍️ 35 kg bags | |
| 🏖️ Sand |
For a render, the total thickness includes all coats (scratch coat + main coat + finish ≈ 2 cm in total, generally). For a concrete slab, also plan the gravel: about 0.70 m³ per m³ of concrete.
Quick reference
| Work | Typical thickness | Cement per 10 m² |
|---|---|---|
| Screed | 5 cm | ≈ 150 kg — 5 bags |
| Render (2 coats) | 2 cm | ≈ 70 kg — 2 bags |
| Concrete slab | 12 cm | ≈ 360 kg — 11 bags |