Free & Instant
Concrete Calculator
Calculate the exact volume of concrete needed for your project in cubic meters, plus estimated cement bags required.
Concrete Calculator
Calculate concrete volume in cubic meters.
Concrete Volume
0.00 m³
0
Cement Bags (50kg)
0.00 m³
Sand
0.00 m³
Aggregate
What is a Concrete Calculator?
A concrete calculator helps you estimate exactly how much concrete you need for a slab, footing, driveway, or foundation, based on the length, width, and depth of the area you're pouring. It also breaks down the cement, sand, and aggregate quantities based on your chosen mix ratio, helping you avoid over-ordering or running short on-site.
Concrete Volume Formula
Concrete volume is calculated by multiplying the length, width, and depth of the area (all measurements converted to meters):
Volume (m³) = Length (m) × Width (m) × Depth (m)
Common Concrete Mix Ratios
| Mix Ratio | Cement : Sand : Aggregate | Typical Use |
|---|---|---|
| 1:1.5:3 | High cement content | Columns, beams, high-strength structures |
| 1:2:4 | Standard mix | Slabs, driveways, general RCC work |
| 1:3:6 | Lean mix | Footings, leveling courses |
| 1:4:8 | Low strength mix | Mass concrete, non-structural fill |
Frequently Asked Questions
How many bags of cement do I need per cubic meter?
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For a standard 1:2:4 mix, you typically need around 6 to 7 bags of 50kg cement per cubic meter of concrete, depending on the exact mix design and wastage allowance.
Should I add extra concrete for wastage?
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Yes, it's common practice to order 5–10% extra concrete to account for spillage, uneven subgrade, and formwork variations.
Can I use this calculator for circular or irregular areas?
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This calculator is designed for rectangular slabs and footings. For circular or irregular shapes, you'll need to calculate the area separately before multiplying by depth.