Calculate lintel concrete volume, materials, wastage, and procurement totals quickly. Review cost drivers before ordering. Build confident purchase plans using practical site-ready calculations today.
This calculator estimates concrete lintel volume for procurement. It starts with opening length, adds bearing on both sides, and builds the final lintel span. It then multiplies span, width, depth, and quantity to find total wet concrete volume.
Procurement rarely matches neat drawing values. Site waste, handling loss, overbreak, spillage, and small dimensional changes usually increase the required order. That is why the tool adds a waste allowance before moving to material planning.
For site mixing, the tool converts wet concrete volume into dry material volume using a dry volume factor. Then it splits that dry volume across the selected nominal mix ratio. From there, it estimates cement volume, cement weight, required cement bags, sand volume, and aggregate volume.
Procurement planning also needs money figures. This page lets you enter rates for cement bags, sand, aggregate, ready mix concrete, and other miscellaneous costs. It then shows a site mix total and a ready mix total, so you can compare options before purchase.
The result section is placed directly below the header and above the form after submission. That keeps the answer visible immediately. The graph also gives a quick visual check of major procurement volumes, which is useful for tender reviews, small residential jobs, and routine site ordering.
1. Effective lintel span
Effective Span = Opening Length + (2 × Bearing Each Side)
2. Volume of one lintel
Unit Volume = Effective Span × Width × Depth
3. Gross concrete volume
Gross Volume = Unit Volume × Quantity
4. Procurement volume
Procurement Volume = Gross Volume × (1 + Waste % / 100)
5. Dry material volume
Dry Volume = Procurement Volume × Dry Volume Factor
6. Material split by nominal mix
Material Volume = Dry Volume × (Individual Ratio / Total Ratio)
7. Cement mass and bags
Cement Mass = Cement Volume × Cement Density
Cement Bags = Cement Mass ÷ Bag Weight
8. Cost estimate
Site Mix Total = Cement Cost + Sand Cost + Aggregate Cost + Miscellaneous Cost
Ready Mix Total = (Procurement Volume × Ready Mix Rate) + Miscellaneous Cost
Enter the clear opening length in meters. Add the bearing length provided on each side in millimeters. Then enter lintel width and depth in millimeters.
Set the number of identical lintels. Add a waste allowance that matches your site conditions. Use a higher waste percentage for difficult access, many small pours, or uncertain dimensions.
Choose the dry volume factor and the nominal mix ratio used by your project. Common values often depend on local practice, method statements, and engineer approval.
Enter cement density, bag weight, and material rates. Submit the form. Review volume, bags, material quantities, and the site mix versus ready mix cost comparison.
Use the CSV button for spreadsheets. Use the PDF button for a quick saved summary. Confirm all procurement values against approved structural drawings and project specifications before ordering.
| Opening (m) | Bearing Each Side (mm) | Width (mm) | Depth (mm) | Qty | Waste % | Mix | Procurement Volume (m³) | Cement Bags |
|---|---|---|---|---|---|---|---|---|
| 1.80 | 150 | 200 | 225 | 4 | 5 | 1:2:4 | 0.3969 | 2.51 |
| 2.40 | 200 | 230 | 300 | 3 | 7 | 1:1.5:3 | 0.5526 | 4.08 |
| 1.20 | 150 | 150 | 200 | 6 | 4 | 1:2:4 | 0.2808 | 1.77 |
A lintel sits beyond the clear opening. The end bearing transfers load into the wall. Ignoring bearing usually underestimates total concrete volume and order quantities.
Waste covers spillage, over-ordering, uneven shuttering, dimensional tolerance, small overbreak, leftover concrete, and site handling loss. Difficult access often needs a higher allowance.
Site-mixed concrete materials are batched dry. Dry ingredients occupy more volume before mixing and compaction. The dry volume factor helps estimate cement, sand, and aggregate procurement.
No. Structural work should follow approved drawings, mix design, and engineer instructions. Use this calculator for procurement planning, then verify assumptions with project requirements.
Yes. Cement is purchased in whole bags. The calculator shows exact bags and also shows a rounded order quantity to support practical buying decisions.
Yes, for basic volume checks. However, precast procurement may also require reinforcement schedules, mold allowances, lifting details, curing losses, and supplier packaging rules.
The cheaper option is not always obvious. Small jobs may favor site mixing, while larger pours or tighter quality control may favor ready mix supply.
No. It focuses on concrete and concrete material procurement. Reinforcement should be measured separately from bar schedules, cover requirements, lap lengths, and bending details.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.