Concrete Calculator
Fast, mobile‑friendly calculator for slabs, footings, and columns block.
Metric & Imperial
Waste factor
Bag presets
Slab
Rectangular
Cylinder
Total volume (with waste)
0.000 m³
Cubic yards
0.000 yd³
Cubic feet
0.000 ft³
Bags / Ready‑mix
Bag yield varies by brand. Adjust below or pick a preset.
Bags needed (rounded up)
0
Truck loads (if selected)
—
Waste included
10%
Quick tips
- Change Units to switch between Metric and Imperial inputs.
- Use Precision to show more decimal places.
- For columns, use Diameter not radius.
- Default bag yield is ~0.017 m³ (≈ 0.6 ft³) per 80 lb bag—adjust for your brand.
- Always verify local code requirements and add an appropriate waste factor.
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Summary
Slab
Enter dimensions and press Calculate.