Inputs
AdvancedSwitching converts current values.
Room Segments
| # | Name | Length | Width | Thickness | Wedge? | Start | End | Openings | |
|---|---|---|---|---|---|---|---|---|---|
| m/ft | m/ft | mm/in | mm/in | mm/in | m²/ft² |
Mix Settings (Volume based)
:
Common: 1:3, 1:4, 1:5
Converts wet to loose dry volume
₨
Results
Enter inputs and click Calculate.
Example Data Table
| Segment | Length | Width | Uniform Thickness | Openings | Notes |
|---|---|---|---|---|---|
| Living | 5.0 m | 4.0 m | 40 mm | 0.00 m² | Flat |
| Kitchen | 3.2 m | 2.6 m | 45 mm | 0.50 m² | Deduct cabinets |
| Hall | 7.0 m | 1.3 m | 35–45 mm | 0.00 m² | Wedge slope |
Formula Used
Net Area = Length × Width − Openings.
Average Thickness = Uniform thickness, or (Start + End)/2 for wedge.
Wet Volume = Σ(Net Area × Thickness).
Loose Dry Volume = Wet Volume × Dry Volume Factor.
For ratio C:S, Total Parts = C + S.
Cement Volume = Loose Dry Volume × (C / Total Parts); Sand Volume = Loose Dry Volume × (S / Total Parts).
Cement Mass = Cement Volume × Cement Density; Sand Mass = Sand Volume × Sand Density.
Water (liters) ≈ Cement Mass × w/c ratio. Screed Mass ≈ Wet Volume × Screed Density.
Coverage Method: Bag Volume = Coverage Area × Thickness. Bags = Wet Volume / Bag Volume.
Apply Wastage: multiply required volumes by (1 + Wastage%).
How to Use
- Choose your units and method (volume mix or coverage-based).
- Add segments. Use “Wedge?” for sloped areas; enter start/end thickness.
- Set wastage, densities, mix ratio, and bag size or coverage.
- Click Calculate to see totals, bags, and estimated costs.
- Use Download CSV or Download PDF to export.
FAQs
Typical loose dry factor ranges 1.30–1.54. This calculator defaults to 1.33 for screed; adjust if your materials are fluffier or coarser.
Enable “Wedge?” on a segment and enter start and end thickness. The calculator uses the average thickness to compute volume accurately.
Yes. Switch Method to Coverage. Enter area covered per bag at a reference thickness, plus bag weight and cost to compute required bags and totals.
Defaults: cement 1440 kg/m³, sand 1600 kg/m³, wet screed 2000 kg/m³. You can override to match local materials or specifications.
Water is approximated as w/c × cement mass (liters). Actual site water depends on moisture in sand, admixtures, and performance requirements.