Quality Inspector
Masonry & Wall
Stone Soling Calculator (2026) – Materials Estimator
Expert Guide
Estimate materials for heavy-duty ground preparation using rubble or stone soling.
⚡ Quick Answer
For a 10m x 5m area with 6" stone soling, you need approximately 9.5 m³ of stone (335 CFT) and 1.5 m³ of sand for void filling. For professional structural estimates, visit pro.nirmansutra.com.
🛠️ How It Works
- •Enter the site length and width to calculate the surface area.
- •Select the intended thickness of the soling layer.
- •The tool calculates the volume of loose stones needed (using a 1.25 compaction factor) and the sand required to fill voids.
📐 Calculation Formula
Stone Volume = (Area × Thickness × 1.25) + Wastage
Filling Sand = Area × Thickness × 0.20
📋 Real-Life Example
For 10m x 5m area with 150mm thickness:
• Base Volume = 10 * 5 * 0.15 = 7.5 m³
• Loose Stone (1.25 factor) = 7.5 * 1.25 = 9.375 m³
• 5% Wastage = 9.84 m³ (347 CFT)
• Sand filling (20%) = 7.5 * 0.20 = 1.5 m³ (53 CFT)
⚠️ Common Mistakes to Avoid
- ✕Assuming the base volume is enough — stones are loose and need 20-30% more volume to reach the target height after compaction.
- ✕Neglecting sand for void filling, which leads to a weak and unstable sub-base.
- ✕Using uneven stone sizes, causing excessive voids and requiring more sand.
❓ Frequently Asked Questions
Stones have significant air gaps when loose. To get a solid, compacted layer of 6 inches, you need to order about 25% more material by volume.
Sand fills the voids between large stones, creating a locked, stable surface that prevents the sub-base from shifting under the floor or slab.
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- ✓Save up to 11% on materials with an accurate BOQ.
Worth NRs. 5,000
NRs. 999 🎯
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