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Concrete Calculators
Screed Flooring Calculator (2026) – Precision Leveling Estimator
Expert Guide
Determine the exact volume of raw materials required to lay a professional floor screed. Handles both standard mortar for thin layers (<2") and fine concrete with chips for thicker leveling (>2").
🛠️ How It Works
The calculator determines the wet volume by multiplying Area and Thickness. For thin layer mortar (<2"), it applies a 1.33 dry factor. For structural screed (>2") with chips, it uses a 1.54 factor to account for stone and sand density. Punning is calculated as a separate 5mm 1:1 finishing coat.
- •Measure the floor area and determine the required thickness (standard is 40-75mm).
- •Select **1:2:4** for residential standard leveling or **1:1.5:3** for industrial durability.
- •The calculator applies the **1.54 Expansion Factor** to find the total dry volume of raw materials.
- •Materials are then split into Cement (bags), Sand (CFT), and 10mm Chips (CFT).
- •If **Punning** is selected, a 5mm 1:1 cement-sand coat is added to the total estimate.
📐 Calculation Formula
Wet Volume = Area × Thickness
Dry Volume (Mortar < 2") = Wet Volume × 1.33
Dry Volume (Concrete > 2") = Wet Volume × 1.54
Punning Coat = (Area × 0.0075m) × 1.33 (optional)
⚠️ Common Mistakes to Avoid
- ✕Using the 1.33 mortar factor for chips screeding, which leads to a severe shortage of materials.
- ✕Forgetting to properly clean and wet the base slab, causing the screed to "hollow" or peel.
- ✕Applying a punning coat that is too thick (>10mm), which often leads to hairline cracks (crazing).
- ✕Skipping the 7-day water curing period, which reduces the surface hardness of the finished floor.
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❓ Frequently Asked Questions
Punning is a 5-10mm thin layer of rich cement-sand (1:1) mortar applied over the leveled screed for a smooth, dust-free finish.
For a 100m² floor at 50mm using 1:2:4 ratio, you need approx 32 bags of cement. This tool helps you define the exact ratio for precise ordering.
Chips (fine concrete) provide better structural bonding and prevent long-term hollow sounds in the floor compared to pure sand-mortar.
Stop Guessing.
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- ✓Save up to 11% on materials with an accurate BOQ.
Worth NRs. 5,000
NRs. 999 🎯
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