Concrete Volume Calculator
Slabs, footings, columns, beams, and steps. Mix design with bag counts or ready-mix volumes.
10% is typical for slabs. Use 15% for irregular shapes, 5% for ready-mix where you can order exact m³.
Set individual quantities per section below.
Pour Sections
Mix Design
A 25 kg bag yields ~0.012 m³; a 40 kg bag yields ~0.019 m³ of finished concrete.
Site-mix proportions per m³ of finished concrete (approximate):
Job Costing (optional)
Results
Net Volume
-
m³
With Waste
-
m³ to order
Bags (pre-mix)
-
× 40 kg bags
Ready-mix
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m³ (order)
Pour Breakdown
| Section | Type | Qty | Net vol (m³) | With waste (m³) |
|---|