About the Civil BOM Estimator
What is the Civil BOM Estimator?
This construction material estimator uses standard thumb rules per square foot of built-up area to create a quick bill of materials for an RCC-framed building with brick walls.
Enter local rates for cement, steel, sand, aggregate and bricks to get the material cost and an approximate total construction cost.
How to use the Civil BOM Estimator
- Built-up Area (sq ft) (sample: 1,000)
- Cement (₹ per 50 kg bag) (sample: 400)
- TMT Steel (₹ per kg) (sample: 65)
- Sand (₹ per cft) (sample: 60)
- Aggregate (₹ per cft) (sample: 50)
- Bricks (₹ each) (sample: 9)
- Press Estimate Materials & Cost (results also refresh as you type). The result card shows the Material Cost, along with Material cost per sq ft, Approximate total construction cost (materials ≈ 60%) and Basis.
Formula used
Quantity = Built-up area × Thumb-rule factor
- Factors per sq ft = cement 0.4 bag, steel 4 kg, sand 1.816 cft, aggregate 1.35 cft, bricks 8
- Total cost = material cost ÷ 0.6 (materials are about 60% of cost)
Thumb rules are for early budgeting; a detailed estimate follows the drawings.
Worked example
These are the sample values already filled in the calculator above, and the result it returns for them:
| Input | Sample value |
|---|---|
| Built-up Area (sq ft) | 1,000 |
| Cement (₹ per 50 kg bag) | 400 |
| TMT Steel (₹ per kg) | 65 |
| Sand (₹ per cft) | 60 |
| Aggregate (₹ per cft) | 50 |
| Bricks (₹ each) | 9 |
| Result | Value |
|---|---|
| Material Cost | ₹6,68,460 |
| Material cost per sq ft | ₹668.46 |
| Approximate total construction cost (materials ≈ 60%) | ₹11,14,100 |
| Basis | Thumb-rule quantities for an RCC-framed building with brick walls |
Tips for using the Civil BOM Estimator
- Buy steel and cement in phases to manage price swings.
- Keep 10% contingency over the estimate.